TESTING AND COMMISSION
PART 1 - GENERAL
1.01 RELATED DOCUMENTS:
A. Drawings and general provisions of Contract, including General and special
Conditions (General requirements), apply to work of this section.
B. Division-16 "Basic Electrical Materials and Methods "and other sections
apply.
1.02 SUMMARY:
A. this section defines the tests and checks that shall be made on all electrical
equipment and wiring to ensure compliance with all applicable codes and
standards, and with the requirements of the contract documents.
1.03 DESCRIPTION OF WOR
K
A. The work covered by this section consists of providing all tools, labour,
equipment, and materials, and performing all operations in connection with
the final acceptance testing of electrical installations prior to handing over
and testing of existing installations as required for diagnosing faults and
preparation for repair or renewal.
B. (Commissioning testing is the responsibility of the contractor who must
satisfy himself that all equipment is installed properly and in good working
order before final acceptance tests are carried out in the presence of the
engineer).
1.04 REFERENCES:
1. Make inspections and tests in accordance with the applicable codes and
standards of the following agencies except as provided otherwise herein.
A. APPLICABLE STANDARDS.
When a new local standard is issued it automatically takes precedence over
any other standard or specification mentioned below.
B. INTERNATIONAL STANDARDS
ISO 8528 Reciprocating Internal Combustion Engine Driven
Alternating Current Generating Sets.
ISO 8528-6:93 part 6: Test Methods.
ISO 8528-8:96 part 8: Requirements and Tests for Low Power
Generating Sets.
ISO 8528-9:96 part 9: Measurement and Evaluation of Mechanical
Vibrations.
ISO 8528-12:98 part 12: Emergency Power Supply To Safety Devices
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C. INTERNATIONAL ELECTROTECHNICAL COMMISSION (IEC)
IEC 60076-3:80 part 3: Insulation Level And Dielectric Tests
IEC 60439 Low Voltage Switchgear And Control Gear
Assemblies
IEC 60439-1:92(96) Part 1: Type Tested And Partially Type Tested
Assemblies
IEC 60502-1:97 part 1: Cables For Rated Voltages of 1 kV.
IEC 60974 Low Voltage Switchgear And Control Gear
IEC 61117:92 A Method for assessing the Short-Circuit
Withstand Strength or Partially Type-Tested
Assemblies.
IEC 61180 High Voltage Test Techniques For Low Voltage
Equipment.
IEC 611801-1:92(94) Part 1: Definitions Test and Procedure Requirements.
IEC 61180-2:94 Part 2 : Test Equipment
IEC 61557 Electrical Safety in Low Voltage Distribution
Systems up to 1000V A.C. and 1500 V DC,
Equipment of Testing Measuring Or Monitoring of
Protective Measures.
IEC 61557-1:97 Part 1: General Requirements.
IEC 61557-2:97 Part 2: Insulation Resistance.
IEC 61557-3:97 Part 3: Loop Impedance First Edition
IEC 61557-4:97 Part 4: Resistance of Earth Connection and
Equipotential Bonding.
IEC 61557-5:97 Part 5: Resistance to Earth
IEC 61557-6:97 Part 6: Resistance Current Devices In TT TN Systems.
D. NATIONAL FIRE PROTECTION ASSOCIATION - NFPA
1. ANSI/NFPA 70: National Electrical Code.
2. ANSI/NFPA 70B: Recommended Practice for Electrical Equipment
Maintenance.
3. NFPA 70E : Electrical Safety Requirements For Employee Workplaces
PART 2 – PRODUCTS
2.01 TESTING COORDINATION
A. Coordinate activities and cooperate with others on the project to ensure that
systems are energized when required, when loads are applies and that other
requirements of this section of the specifications are carried out in a timely
coordinated basis.
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B. Conduct tests in the presence of the Electrical/Engineer and the
Construction Manager. Notify the Architect/Engineer and Construction
Manager seven calendar days or more in advance when any test is to be
performed, and do not start tests without the permission of the
Electrical/Engineer and construction Manager.
2.02 GENERAL
A. The engineer shall inspect and test at the makers works, during manufacture
and after completion, all or any particular manufactured material, apparatus
or equipment ordered by the contractor for incorporation in the works in
order to prove that the material apparatus or equipment meets the
requirements of this specification. The contactor shall notify the engineer in
advance of all such inspections and tests.
B. The engineer must arrange on his expenses for works tests to be attended by
the Engineer for all tests specified on different sections of specifications.
C. The Contractor shall submit to the Engineer, at the time of issue three
copies of each and every for bought in material, apparatus and equipment
intended for incorporation in the works.
Each such order shall clearly state whether the item(s) which it covers is or
are subject to inspection or test before dispatch to site.
D. Upon completion of manufacture, or before despatch in the case of stock
items, all material, apparatus and equipment intended for incorporation in
the works shall be subjected, to the tests specified in the relevant National
Standard or elsewhere in this specification together with such additional
tests as may be required in order to prove compliance with this
specification. When this specification. When no relevant British Standard
exists, or the appropriate National Standard fails to specify tests, the
Contractor shall submit his proposals for the tests he requires to provide
compliance with the specification.
E. The results of each test carried out in accordance with the provisions of this
specification shall be accurately and comprehensively recorded on a form of
test certificate signed by the person in charge of the testing procedure and
countersigned by the contractor and four copies of every such test certificate
shall be submitted to the Engineer.
F. Every test certificate shall include, in addition to all other requirements the
fate and time of the test, the ambient conditions, a fully detailed description
of the test(s) carried out, the results obtained, and any relevant performance
curves.
G. The Contractor shall be responsible for ensuring that the Engineer is
advised in wiring whenever material, apparatus or equipment is ready for
inspection or test at his own or his suppliers'. At least seven days notice
shall be given, and due allowance shall be made for this period of notice in
drawing up the program of works.
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H. In Cases where the manufacturer or material, apparatus or equipment relies
upon type tests to prove, either wholly or in part, the suitability of his
product(s) then the Contractor shall arrange for triplicate copies of
certificates giving the results of such type tests to be submitted to the
Engineer at the time the order is placed.
I No material, apparatus or equipment, from whatever source, shall be
despatched to site until the Engineer has had the opportunity to inspect it or
has given written authorization for despatch.
J No inspection or testing by the Engineer nor the witnessing of satisfactory
tests nor the authorizing of despatch to site shall in any way relieve the
contractor of any of his obligations under this contract, nor shall it in any
way limit the right of the Engineer to reject such items after delivery to site
if they subsequently prove to be defective or unsatisfactory or unsuitable for
their intended purpose.
K When the contractor has ordered equipment from a manufacturer who, in
turn, has bought-in major components from a secondary supplier, the
Engineer shall have the right to elect to inspect such components at the
works of the secondary supplier, and the contractor shall ensure, when
placing his orders, that such rights are secured.
For the purposed of this clause, inter-departmental orders within the same
organization shall be treated in the same manner as orders involving
separate organizations.
L The engineer shall have the right to waive, at his sole discretion, the
requirements relating to his inspection of materials, apparatus and
equipment at the makers works. The exercise by the Engineer of this right
shall not in any way relieve the contractor of his obligation to carry out the
prescribed tests and to submit test certificates.
M No work shall be painted or otherwise prepared for despatch until it has
been inspected by the engineer, or inspection has been waived and despatch
has been authorized.
N When one or more of the Contractor's purchase orders covers the supply of
a number of like components or items of equipment, the Engineer shall
have the right to select that one item or component of each type and rating
be subjected to type tests as described only to routing tests.
PART 3 – EXECUTION:
3.01 GENERAL
A. Test all equipment.
B. Whenever possible, all checks and tests shall be made just prior to
energizing the equipment or circuits, and shall be coordinated with the field
schedule and field conditions.
C. Before testing and energizing a system, all necessary precautions shall be
taken to ensure the safety or personnel and equipment. All conductors and
all electrical equipment shall be properly insulated and enclosed. All
enclosure for conductors and equipment shall be properly insulated and
enclosed. All enclosures for conductors and equipment shall be properly
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grounded. Insulation resistance measurements must have been made and
approved on all conductors and energized parts of electrical equipment.
3.02 SITE TESTS:
A. The Contractor shall carry out all necessary checks and tests to prove that
the completed installations fully comply with specified requirements.
B. Upon completion of the electrical installation, or any substantial section
thereof, the installation, or any substantial section thereof, the installation
or that section and all of the associated electrical equipment shall be
subjected to the tests specified in the relevant National Standards and in the
IEE Wiring Regulations, together with such other tests as may be specified
in order to prove compliance with the Specification.
C. All of the required checks and tests shall be carried out in accordance with
a program to be agreed with the Engineer, and facilities shall be made
available for the Engineer to be present at all such checks and tests if he so
desires.
D. Test not carried out in the presence of the Engineer shall not be regarded as
valid for the purpose of the Contract, unless the Owner's Authorized
Representative shall not be regarded as valid for the purpose of the
Contract, unless the Engineer shall have authorized the Contractor to
proceed with the testing process in his absence.
E. Every test certificate shall include, in addition to all other requirements, the
date and time of the test, the ambient conditions, a fully detailed description
of the test(s) carried out, the result obtained, and any relevant performance
curves.
F. No material, apparatus, equipment, or installation shall be covered or
otherwise permanently concealed from view instil the Engineer has had the
opportunity to inspect it, given written authorization for covering to
proceed.
G. No work shall have a final paint finish until it has been inspected the
Engineer or painting has been authorized, unless the final paint finish is
necessary to provide the necessary climatic protection.
H. No apparatus. Equipments, plant, or installations will be recognized as
complete until all of the specified inspections and tests have been
satisfactorily carried out.
I. The Engineer shall have the right to waive , at his sole discretion, the
requirements relating to his inspection of materials, apparatus equipment
and installations and the witnessing of tests thereon. The exercise by the
Owner's Authorized Representative of this right shall not in any way relieve
the Contractor of his obligations to carry out the prescribed tests and to
submit test certificates.
J. Check and test all switchboards, transformers, panel boards, feeders, power
and control cables, communication system devices and wiring, and all
connections to all equipment.
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K. After wires and cables are in place are in place and connected to devices
and equipment, the system shall be tested for short circuits, improper
grounds, and other faults. If fault condition is present, the trouble shall be
rectified and the wiring system shall be retested.
L. Phase conductors if shorted, grounded or at fault shall be removed, shall be
replaced and the wiring system shall be retested.
M. A voltage test shall be made at each lighting panel, distribution panel and at
the last outlet on each circuit. If drop in potential exceeds one percent,
correct the condition by locating the ground or high resistance splice or
connection and retest.
N. Any wiring device, electrical apparatus, or lighting fixture grounded or
shorted on any integral "live" part, shall be removed and the trouble
rectified by replacing the defective parts or materials.
O. Upon completion of the work, place the entire installation in operation, test
proper function, and show systems and equipment to be free of defects.
P. All final tests shall be witnessed by the Electrical/Engineer and
Construction Manger and three copies of the verified test results shall be
given to the Electrical/Engineer and Construction Manager promptly upon
completion of a test.
Q. Provide assistance to the various equipment manufacturers field engineers
as required in the testing and adjusting of the electrical power and control
equipment. Cooperation shall be such that a minimum of time is required
for equipment testing.
R. A log shall be maintained for all tests. This log shall be certified before
completion of the project, both as to test value and date to test. All major
equipment such as the switchboard and panel boards shall be energized
initially in the presence of the Electrical/Engineer and Construction
Manager.
S. Any faults in the work performed or in materials or in materials or
equipment furnished shall be corrected or replaced promptly. Any faults in
materials or equipment furnished, which are the result of careless,
incompetent or improper handing or installation, shall be corrected or
replaced promptly at no cost to the board of education.
T. Include all costs for labor, material and test equipment as part of the
various unit line items in the Base Bid certification of the tests shall be
submitted to the Electrical/Engineer and construction manager. If any
failures occur during the tests repair or replace the defective item at the
discretion of the Electrical/Engineer, whose decision shall be final and
binding
U. All tests shall be recorded on the following forms:
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FORM NUMBER DESCRIPTION
16452-1 MULTIPLE CONDUCTOR CABLE
MEGGER TEST
300 Volts & Less
16452-2 SINGLE & MULTIPLE CONDUCTOR
POWER CABLE MEGGER TEST, 600V
AND LESS
Form 16452-1
MULTIPLE CONDUCTOR CABLE MEGGER TEST, 300 VOLTS & LESS
WIRING – SIGNAL & COMMUNICATION CABLE
Testing shall be performed before connecting the cables to the terminals at either end.
Continuity of each conductor shall be checked at this time.
Each conductor shall be checked with a 500 volt megger to ground, with all other
conductors in the cable and shield, grounded. The minimum acceptable megger
resistance shall be 50 megohms for each conductor to ground.
PROJECT NAME ___________________________________________________
FEEDER NUMBER _______________________ LOCATION___________________
CABLE SIZE _______________________ CABLE LENGTH______________
NO. OF INSULATION TYPE___________
CONDUCTORS ________________________ _________________
MANUFACTURER ________________________ LINE VOLTAGE _____________
TEMPERATURE ________________________ HUMIDITY _________________
MEGGER TYPE ________________________ SERIAL NUMBER ___________
TEST VOLTAGE ________________________ MULTIPLIER ________________
REMARKS ____________________________________________________
CONDUCTOR
NO.
MEGOHMS CONTINUITE CONDUCTOR
NO.
MEGOHMS CONTINUITE
C/C C/S PASS FALL C/C C/S PASS FALL
TEST PERFORMED ________________________ _________________
BY: Signature Date
TEST WITNESSED _______________________ _________________
BY: Signature Date
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Form 16452-2
SINGLE & MULTIPLE CONDUCTOR POWER CABLE MEGGER TEST, 600V
AND LESS
WIRING – FEEDER CIRCUITS
Testing shall be performed before connecting the cable to the terminals at either end.
Continuity of each conductor shall be checked at this time.
Each conductor shall be checked with a 500 volt megger to ground, with all other
conductors in the cable and shield, grounded. The minimum acceptable megger
resistance shall be 50 megohms for each conductor to ground.
PROJECT NAME ___________________________________________________
FEEDER NUMBER _______________________ LOCATION___________________
CABLE SIZE _______________________ CABLE LENGTH______________
NO. OF INSULATION TYPE___________
CONDUCTORS ________________________ _________________
MANUFACTURER ________________________ LINE VOLTAGE _____________
TEMPERATURE ________________________ HUMIDITY _________________
MEGGER TYPE ________________________ SERIAL NUMBER ___________
TEST VOLTAGE ________________________ MULTIPLIER ________________
REMARKS ____________________________________________________
If Applicable, All shields Must Be Properly Grounded prior to Testing.
Cable No. MEGOHMS
phase A
MEGOHMS
phase B
MEGOHMS
phase C
TEST PERFORMED ________________________ _________________
BY: Signature Date
TEST WITNESSED _______________________ _________________
BY: Signature Date
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3.03 TEST INSTRUMENTS:
A. MULTI-METERS
Multi-meters shall be professional quality, with electronic measuring
circuits fully protected against over voltage, digital readout and true R.M.S
indication. They shall be equipped with sufficient scales to enable any
reading to be at least 60% of maximum scale reading, and accuracy shall be
not less than +/- 5% of full scale.
B. INSULATION TESTERS
Insulation testers shall conform to IEC 61557-2.
C. CABLE FAULT LOCATION SETS
Cable fault location test sets shall measure distance to fault by measuring
time of reflection of test impulse voltage or other method of comparable
accuracy.
D. EARTH CONTINUITY TESTERS
Earth continuity shall be measured according to IEC 61557-3 and IEC
61557-4 by injecting current (generally 25 amperes ) into the circuit to be
tested and measuring voltage drop at accessible points. The use of relatively
high current is required to locate loose or poor connections that would fail
during an earth fault but might not be detected during a low current test
such as using an ohmmeter.
E. EARTHING ELECTRODE OR SYSTEM RESISTANCE TEST SET.
Equipment for Measuring Earth Electrode resistance shall conform with
two test earth electrodes and injecting a current between earth electrode and
a test electrode at a distance from the main earth. A potential electrode is
then inserted and volt drop measured between the ground and the main
earth electrode from which the earth resistance can be measured.
F. TESTING RESIDUAL CURRENT DEVICES
Equipment for testing residual current de4vices shall conform to IEC
61557-6.
G. LUX METER
Utilising a photoelectric cell to measure incident light. The meter shall have
a calibrating light circuit and shall have an accuracy of at least +/-5%.
3.04 TEST INSTRUMENT STANDARDS :
1. Use only equipment for testing and calibration procedures that has the following
characteristics.
A. Maintained in good visual and mechanical condition.
B. Maintained in safe operating condition.
2. Use test equipment having operating accuracy equal to or better than the
following limits:
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A. Portable multimeters: true RMS measuring.
B. Multimeters shall have the following accuracy limits, or better:
1) AC voltage ranges:75% ±3 last single digits@50 Hz.
2) AC current ranges: 90% ± 3 last single digits @ 50Hz, including
adapters, transducers.
3) DC voltage ranges: 25%± 1 last single digit.
4) DC current ranges: 75% ± 1 last single digit.
5) Resistance Ranges: 50% ± 1 last single digit
6) Frequency Ranges: 10% ± 1 last single digit @ 50 Hz
C. Clamp-on ammeters: AC current ± 3% of range ± 1 last single digit @
50Hz.
D. Dissipation/power factor field equipment.
1. ± 0.1% power factor for power factor values up to 2.0%.
2. 5% of the reading for power factor values above 2.0%.
E. Low-range DC resistance equipment 1.0% of reading ± 2 last dingle digits.
F. Transformer turns-ratio test equipment 0.5% or better @ 50 Hz.
G. Ground electrode test equipment ± 2% of range.
H. Insulation Test Sets: 0-1000V DC ± 20% of reading at mid-scale.
I. Electrical load survey equipment:
1. ± 5% total error, including sensors.
2. 1% resolution.
3. Current transformers ± 2% of range @ 50 Hz.
4. Voltage transformers ± 0.5% of range @ 50 Hz.
J. Liquid dielectric strength test equipment ± 2% of scale.
K. Infrared scanning equipment: sensitivity of 2C.
L. Phase Shifting equipment: ± 1.0 over entire range.
M. High-current test equipment: ± 2% of range
N. DC high potential test equipment . ±2% of full scale.
O. AC high potential test equipment (50 Hz): ±2% of full scale
3.05 TEST
A. LOW-VOLTAGE CABLES AND WIRES
The connection between the neutral and the earth busbar of LV
switchboards and panelboards shall be removed, if any, and all motors and
other loads shall be disconnected, except lighting fixtures, which shall be
connected during the test but with lamps removed.
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The test voltage shall be applied between all normally live conductors (L1-
L2,L1-L3, L2-L3), between normally live conductors and the neutral
conductor (L1-N,L2-N,L3-N), between normally live conductors and
protective conductor (L1-PE,L2-PE,L3-PE), and between neutral conductor
and protective conductor (N-PE).
The test is satisfactory if the insulation resistance is equal or greater than
1000 Ohm per volt operating voltage E.g. for a 220/127 V system:
Between phases 220.000 Ohm.
Between phases and neutral or earth 127.000 Ohm.
Between neutral and earth 127.000 Ohm
For a 380/220 V system:
Between phases 380.000 Ohm.
Between phases and neutral or earth 220.000 Ohm.
Between neutral and earth 220.000 Ohm
An insulation test shall be performed on direct buried cables before and
after backfilling of trenches and before the installation is put into service.
B. LOW-VOLTAGE SWITCHBOARDS, DISTRIBUTION BOARDS
AND PANELBOARDS
Low-voltage switchboards, distribution boards and panel boards shall be
type-tested and routing-tested according to IEC 60439-1, IEC 60890,
IEC60947, IEC 61117 and IEC 61180-1 in the factory. Only type-tested and
partially type-tested LV switchboards and panelboards shall be accepted for
building installations.
Before handing-over the insulation resistance between phases, phases and
neutral, phased and earth and neutral and earth shall be measured and
recorded.
Functional tests of all switching devices and protection relays, including
manual and motor operation of switchgear, shall be preformed.
The phasing sequence and phase colours/numbers, switchgear labelling,
earthing and bonding shall be checked.
Control voltage for switchgear and protection relays shall be measured.
Cable terminations and connections, setting and correct tripping of
protection and time relays, contactors and alarms, push-button stations,
rating of fuse links, phase balance, correct indication of measuring devices
shall be checked.
C. LIGHTING
Lighting fixtures shall be identified by a safety mark showing the internal
protection (IP) of the luminaries. The mark is shown in the type plate of the
luminary. A type test in an approved test institute shall establish the
protection requirements of an IP class.
After installation of the lighting fixture on site, the following shall be
checked:
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- Operation of lighting fixture, fitted with lamps of correct
wattage, type and colour.
- Circuit numbering fuse or circuit breaker rating in distribution
panels.
- Luminary earthing
- Light switches.
Lighting levels shall be checked and recorded for all internal areas. Tests
shall be carried out with all external lighting excluded. Maximum, minimum
and average illumination levels shall be measured for all rooms. Measured
values shall be multiplies by 0.7, to allow for depreciation in light output
due to age and soiling. (This factor may be increased to 0.8 if it can be
shown that the lamps have been burning for at least 100hours prior to the
test) Any illumination levels more than 10% below those recommended by
the illuminating Engineering Society shall be brought to the attention of the
engineer.
D. SWITCHES AND SOCKETS
Beside the insulation resistance test of lighting and socket circuits described
above, light switches shall be checked for proper function.
The correct connection and functioning of the protective earthing conductors
of sockets and the tripping of residual-current operated protective devices
(fault –current circuit breakers) of socket circuits in the distribution panel
shall be checked by means of socket testers.
Furthermore the number of socket-outlets per socket circuit shall be counted
and listed
E. POTENTIAL EQUALISATION AND EARTHING
Potential equalisation and earthing in buildings shall be realised and tested
according to IEC 60364-5-54.
For verification of protective measures against indirect contact the earthing
resistance of individual earth electrodes or extended earthing systems for
building earthing shall be measured and recorded.
The test shall be performed at the main earth busbar of the building, with the
earthing connections to the earth electrodes or earthing grid disconnected
from the main earth bar.
The connections of transformer neutrals and transformer rails and
switchgear enclosures to earth shall be inspected for tightness.
The continuity and conductivity of all protective, equipotential and earthbonding
conductors in the building, including socket-earthing contacts shall
be measured and recorded.
The earthing of all exposed and extraneous metallic parts in the building,
clearance distances in bathrooms, ;and proper marking of protective
conductor connections in transformer, switchgear and generator rooms and
in distribution panels shall be checked.
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F. BUILDING CONTROL SYSTEMS
Control systems in buildings shall be tested according to the manufacturer's
instructions and functional tests shall be performed according to
recommendations given by relevant IEC standards for the
G. COMMUNICATION SYSTEMS
Communication systems in buildings shall be tested according to the
manufacturer's instructions.
Functional tests shall be performed, failure and alarm conditions simulated
and all data and alarm indications recorded
All systems involving electronic private branch exchanges (EPABX) shall
be tested on site sand put in operation by the manufacturer's representative.
PART 4– CCOMMISSIONING:
A. Following the satisfactory conclusion of inspections and tests on complete
sections of the works, the Contractor shall duly commission each section of
the electrical installation and leave it in full working order. The term
Commissioning shall be deemed to include:
i. The energizing of electrical distribution circuits and circuits and
equipments which have previously been inspected, tested, found to be
satisfactory and capable of being energize with complete safety.
ii. The setting to electrical protective devices and systems, where relevant,
in accordance with the directions of the Engineer or failing such
directions, in accordance with sound electrical engineering practice.
iii. The starting up of all electrically powered plant and equipment.
iv. The verification of the performance of all such plant and equipment by
the carrying out, where required, of further tests and the making of all
necessary adjustments so as to obtain optimum performance.
B. Compliance with the requirements of this section of the Specification shall
not by itself in any way relieve the Contractor of any of his obligations under
the Contact.
C. The contractor shall ensure that tall connections and adjustments are made
correctly and that the installations and equipment are in a completely safe
and satisfactory condition.
D. All activities carries out by the Contractor in pursuance of the requirements
of this section of the specification shall be carried out, or continuously
supervised, by a competent and experienced commissioning engineer.
E. If considered necessary, the Engineer will set up a commissioning panel to
oversee all activities relating to commissioning of installations, of the panel
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to act in an advisory capacity assisting the Engineer in all matters relating to
the commissioning process.
F. The Engineer shall have power to appoint and independent commissioning
Engineer to act on his behalf in the control of all activities relating to the
commissioning process, and in such matters the said commissioning
Engineer shall be deemed to be and authorized representative of the
Engineer.
G. The Contractor shall be wholly responsible for ensuring that all switching
operations and all work on electrical circuits and equipment which have
once been energized are carried out in a thoroughly safe manner and shall
operate, and rigidly adhere to an approved permit-to-work system. For this
purpose the Contractor shall appoint an authorized person as defined in the
Electricity (Factories Act) Special Regulations and shall communicate the
name of such person in writing to the Engineer.
H. In appropriate cases the Contractor shall nominate a particular employee as
Switchgear Operator and shall ensure that all switchgear operations are
carried out by the nominated person and that such person is always available
for this duty when required.
I. The Contractor shall prepare a commissioning schedule detailing the plant to
be commissioned, the operations to be carried out, the time scale, with exact
dates for specific operations, details of requirements for water and power
services, and attendance or provisions by others. This commissioning
schedule, in draft from shall be submitted not less than four weeks in
advance of the date on which commissioning is to commence.
J. If required by the Engineer, the Contractor shall present the information
from the commissioning schedule in the from of a flodiagram or a PERT
(Critical Path) chart.
K. The procedures to be followed by the Contractor for commissioning the
electrical equipment and installations shall be as directed by the Engineer or
in the absence of such directions, shall be proposed by the Contractor and
submitted to the Owner's Authorized Representative for approval.
L. No connections or adjustments shall be made to plant or equipment which
has already been commissioned and set to work except with the prior
consent of the Engineer.
M. No plant or equipment shall be charged, energized or operated without the
prior agreement of the Owner's Authorized Representative. All applicable
test certificates shall have been first submitted to the Engineer.
N. All commissioning procedures shall be carried out in a safe and satisfactory
manner and in accordance with the provisions of the Factory Acts, the
Health and Safety at work etc. Act, and the Electricity Regulations.
O. Following completion of commissioning each item or equipment or where
several items of equipment are interdependent, the complete plant shall
operate continuously and satisfactorily under normal operating conditions
for a period of 72 hours without defect of any kind. In the event of any
defect or mal-operation becoming apparent during this period the Contractor
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shall forthwith determine the cause and rectify it by means of repair,
replacement, adjustment or modification and the reliability run shall be recommenced.
All materials, equipment and labour required to locate and
rectify any such defect shall be provided by the Contractor at his own
expense.
P. No plant, equipment or installation will be considered as complete until the
prescribed commissioning procedures have been satisfactorily carried out
and the reliability run has been completed without untoward incident.
Q. The Engineer shall have power to require that the hole of the plant,
equipment and installations or selected parts thereof, be re-inspected and if
necessary re-tested immediately before the end or the contractual
arrangements with the Owner.
END OF SECTION 16950
PART 1 - GENERAL
1.01 RELATED DOCUMENTS:
A. Drawings and general provisions of Contract, including General and special
Conditions (General requirements), apply to work of this section.
B. Division-16 "Basic Electrical Materials and Methods "and other sections
apply.
1.02 SUMMARY:
A. this section defines the tests and checks that shall be made on all electrical
equipment and wiring to ensure compliance with all applicable codes and
standards, and with the requirements of the contract documents.
1.03 DESCRIPTION OF WOR
K
A. The work covered by this section consists of providing all tools, labour,
equipment, and materials, and performing all operations in connection with
the final acceptance testing of electrical installations prior to handing over
and testing of existing installations as required for diagnosing faults and
preparation for repair or renewal.
B. (Commissioning testing is the responsibility of the contractor who must
satisfy himself that all equipment is installed properly and in good working
order before final acceptance tests are carried out in the presence of the
engineer).
1.04 REFERENCES:
1. Make inspections and tests in accordance with the applicable codes and
standards of the following agencies except as provided otherwise herein.
A. APPLICABLE STANDARDS.
When a new local standard is issued it automatically takes precedence over
any other standard or specification mentioned below.
B. INTERNATIONAL STANDARDS
ISO 8528 Reciprocating Internal Combustion Engine Driven
Alternating Current Generating Sets.
ISO 8528-6:93 part 6: Test Methods.
ISO 8528-8:96 part 8: Requirements and Tests for Low Power
Generating Sets.
ISO 8528-9:96 part 9: Measurement and Evaluation of Mechanical
Vibrations.
ISO 8528-12:98 part 12: Emergency Power Supply To Safety Devices
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C. INTERNATIONAL ELECTROTECHNICAL COMMISSION (IEC)
IEC 60076-3:80 part 3: Insulation Level And Dielectric Tests
IEC 60439 Low Voltage Switchgear And Control Gear
Assemblies
IEC 60439-1:92(96) Part 1: Type Tested And Partially Type Tested
Assemblies
IEC 60502-1:97 part 1: Cables For Rated Voltages of 1 kV.
IEC 60974 Low Voltage Switchgear And Control Gear
IEC 61117:92 A Method for assessing the Short-Circuit
Withstand Strength or Partially Type-Tested
Assemblies.
IEC 61180 High Voltage Test Techniques For Low Voltage
Equipment.
IEC 611801-1:92(94) Part 1: Definitions Test and Procedure Requirements.
IEC 61180-2:94 Part 2 : Test Equipment
IEC 61557 Electrical Safety in Low Voltage Distribution
Systems up to 1000V A.C. and 1500 V DC,
Equipment of Testing Measuring Or Monitoring of
Protective Measures.
IEC 61557-1:97 Part 1: General Requirements.
IEC 61557-2:97 Part 2: Insulation Resistance.
IEC 61557-3:97 Part 3: Loop Impedance First Edition
IEC 61557-4:97 Part 4: Resistance of Earth Connection and
Equipotential Bonding.
IEC 61557-5:97 Part 5: Resistance to Earth
IEC 61557-6:97 Part 6: Resistance Current Devices In TT TN Systems.
D. NATIONAL FIRE PROTECTION ASSOCIATION - NFPA
1. ANSI/NFPA 70: National Electrical Code.
2. ANSI/NFPA 70B: Recommended Practice for Electrical Equipment
Maintenance.
3. NFPA 70E : Electrical Safety Requirements For Employee Workplaces
PART 2 – PRODUCTS
2.01 TESTING COORDINATION
A. Coordinate activities and cooperate with others on the project to ensure that
systems are energized when required, when loads are applies and that other
requirements of this section of the specifications are carried out in a timely
coordinated basis.
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B. Conduct tests in the presence of the Electrical/Engineer and the
Construction Manager. Notify the Architect/Engineer and Construction
Manager seven calendar days or more in advance when any test is to be
performed, and do not start tests without the permission of the
Electrical/Engineer and construction Manager.
2.02 GENERAL
A. The engineer shall inspect and test at the makers works, during manufacture
and after completion, all or any particular manufactured material, apparatus
or equipment ordered by the contractor for incorporation in the works in
order to prove that the material apparatus or equipment meets the
requirements of this specification. The contactor shall notify the engineer in
advance of all such inspections and tests.
B. The engineer must arrange on his expenses for works tests to be attended by
the Engineer for all tests specified on different sections of specifications.
C. The Contractor shall submit to the Engineer, at the time of issue three
copies of each and every for bought in material, apparatus and equipment
intended for incorporation in the works.
Each such order shall clearly state whether the item(s) which it covers is or
are subject to inspection or test before dispatch to site.
D. Upon completion of manufacture, or before despatch in the case of stock
items, all material, apparatus and equipment intended for incorporation in
the works shall be subjected, to the tests specified in the relevant National
Standard or elsewhere in this specification together with such additional
tests as may be required in order to prove compliance with this
specification. When this specification. When no relevant British Standard
exists, or the appropriate National Standard fails to specify tests, the
Contractor shall submit his proposals for the tests he requires to provide
compliance with the specification.
E. The results of each test carried out in accordance with the provisions of this
specification shall be accurately and comprehensively recorded on a form of
test certificate signed by the person in charge of the testing procedure and
countersigned by the contractor and four copies of every such test certificate
shall be submitted to the Engineer.
F. Every test certificate shall include, in addition to all other requirements the
fate and time of the test, the ambient conditions, a fully detailed description
of the test(s) carried out, the results obtained, and any relevant performance
curves.
G. The Contractor shall be responsible for ensuring that the Engineer is
advised in wiring whenever material, apparatus or equipment is ready for
inspection or test at his own or his suppliers'. At least seven days notice
shall be given, and due allowance shall be made for this period of notice in
drawing up the program of works.
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H. In Cases where the manufacturer or material, apparatus or equipment relies
upon type tests to prove, either wholly or in part, the suitability of his
product(s) then the Contractor shall arrange for triplicate copies of
certificates giving the results of such type tests to be submitted to the
Engineer at the time the order is placed.
I No material, apparatus or equipment, from whatever source, shall be
despatched to site until the Engineer has had the opportunity to inspect it or
has given written authorization for despatch.
J No inspection or testing by the Engineer nor the witnessing of satisfactory
tests nor the authorizing of despatch to site shall in any way relieve the
contractor of any of his obligations under this contract, nor shall it in any
way limit the right of the Engineer to reject such items after delivery to site
if they subsequently prove to be defective or unsatisfactory or unsuitable for
their intended purpose.
K When the contractor has ordered equipment from a manufacturer who, in
turn, has bought-in major components from a secondary supplier, the
Engineer shall have the right to elect to inspect such components at the
works of the secondary supplier, and the contractor shall ensure, when
placing his orders, that such rights are secured.
For the purposed of this clause, inter-departmental orders within the same
organization shall be treated in the same manner as orders involving
separate organizations.
L The engineer shall have the right to waive, at his sole discretion, the
requirements relating to his inspection of materials, apparatus and
equipment at the makers works. The exercise by the Engineer of this right
shall not in any way relieve the contractor of his obligation to carry out the
prescribed tests and to submit test certificates.
M No work shall be painted or otherwise prepared for despatch until it has
been inspected by the engineer, or inspection has been waived and despatch
has been authorized.
N When one or more of the Contractor's purchase orders covers the supply of
a number of like components or items of equipment, the Engineer shall
have the right to select that one item or component of each type and rating
be subjected to type tests as described only to routing tests.
PART 3 – EXECUTION:
3.01 GENERAL
A. Test all equipment.
B. Whenever possible, all checks and tests shall be made just prior to
energizing the equipment or circuits, and shall be coordinated with the field
schedule and field conditions.
C. Before testing and energizing a system, all necessary precautions shall be
taken to ensure the safety or personnel and equipment. All conductors and
all electrical equipment shall be properly insulated and enclosed. All
enclosure for conductors and equipment shall be properly insulated and
enclosed. All enclosures for conductors and equipment shall be properly
5
grounded. Insulation resistance measurements must have been made and
approved on all conductors and energized parts of electrical equipment.
3.02 SITE TESTS:
A. The Contractor shall carry out all necessary checks and tests to prove that
the completed installations fully comply with specified requirements.
B. Upon completion of the electrical installation, or any substantial section
thereof, the installation, or any substantial section thereof, the installation
or that section and all of the associated electrical equipment shall be
subjected to the tests specified in the relevant National Standards and in the
IEE Wiring Regulations, together with such other tests as may be specified
in order to prove compliance with the Specification.
C. All of the required checks and tests shall be carried out in accordance with
a program to be agreed with the Engineer, and facilities shall be made
available for the Engineer to be present at all such checks and tests if he so
desires.
D. Test not carried out in the presence of the Engineer shall not be regarded as
valid for the purpose of the Contract, unless the Owner's Authorized
Representative shall not be regarded as valid for the purpose of the
Contract, unless the Engineer shall have authorized the Contractor to
proceed with the testing process in his absence.
E. Every test certificate shall include, in addition to all other requirements, the
date and time of the test, the ambient conditions, a fully detailed description
of the test(s) carried out, the result obtained, and any relevant performance
curves.
F. No material, apparatus, equipment, or installation shall be covered or
otherwise permanently concealed from view instil the Engineer has had the
opportunity to inspect it, given written authorization for covering to
proceed.
G. No work shall have a final paint finish until it has been inspected the
Engineer or painting has been authorized, unless the final paint finish is
necessary to provide the necessary climatic protection.
H. No apparatus. Equipments, plant, or installations will be recognized as
complete until all of the specified inspections and tests have been
satisfactorily carried out.
I. The Engineer shall have the right to waive , at his sole discretion, the
requirements relating to his inspection of materials, apparatus equipment
and installations and the witnessing of tests thereon. The exercise by the
Owner's Authorized Representative of this right shall not in any way relieve
the Contractor of his obligations to carry out the prescribed tests and to
submit test certificates.
J. Check and test all switchboards, transformers, panel boards, feeders, power
and control cables, communication system devices and wiring, and all
connections to all equipment.
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K. After wires and cables are in place are in place and connected to devices
and equipment, the system shall be tested for short circuits, improper
grounds, and other faults. If fault condition is present, the trouble shall be
rectified and the wiring system shall be retested.
L. Phase conductors if shorted, grounded or at fault shall be removed, shall be
replaced and the wiring system shall be retested.
M. A voltage test shall be made at each lighting panel, distribution panel and at
the last outlet on each circuit. If drop in potential exceeds one percent,
correct the condition by locating the ground or high resistance splice or
connection and retest.
N. Any wiring device, electrical apparatus, or lighting fixture grounded or
shorted on any integral "live" part, shall be removed and the trouble
rectified by replacing the defective parts or materials.
O. Upon completion of the work, place the entire installation in operation, test
proper function, and show systems and equipment to be free of defects.
P. All final tests shall be witnessed by the Electrical/Engineer and
Construction Manger and three copies of the verified test results shall be
given to the Electrical/Engineer and Construction Manager promptly upon
completion of a test.
Q. Provide assistance to the various equipment manufacturers field engineers
as required in the testing and adjusting of the electrical power and control
equipment. Cooperation shall be such that a minimum of time is required
for equipment testing.
R. A log shall be maintained for all tests. This log shall be certified before
completion of the project, both as to test value and date to test. All major
equipment such as the switchboard and panel boards shall be energized
initially in the presence of the Electrical/Engineer and Construction
Manager.
S. Any faults in the work performed or in materials or in materials or
equipment furnished shall be corrected or replaced promptly. Any faults in
materials or equipment furnished, which are the result of careless,
incompetent or improper handing or installation, shall be corrected or
replaced promptly at no cost to the board of education.
T. Include all costs for labor, material and test equipment as part of the
various unit line items in the Base Bid certification of the tests shall be
submitted to the Electrical/Engineer and construction manager. If any
failures occur during the tests repair or replace the defective item at the
discretion of the Electrical/Engineer, whose decision shall be final and
binding
U. All tests shall be recorded on the following forms:
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FORM NUMBER DESCRIPTION
16452-1 MULTIPLE CONDUCTOR CABLE
MEGGER TEST
300 Volts & Less
16452-2 SINGLE & MULTIPLE CONDUCTOR
POWER CABLE MEGGER TEST, 600V
AND LESS
Form 16452-1
MULTIPLE CONDUCTOR CABLE MEGGER TEST, 300 VOLTS & LESS
WIRING – SIGNAL & COMMUNICATION CABLE
Testing shall be performed before connecting the cables to the terminals at either end.
Continuity of each conductor shall be checked at this time.
Each conductor shall be checked with a 500 volt megger to ground, with all other
conductors in the cable and shield, grounded. The minimum acceptable megger
resistance shall be 50 megohms for each conductor to ground.
PROJECT NAME ___________________________________________________
FEEDER NUMBER _______________________ LOCATION___________________
CABLE SIZE _______________________ CABLE LENGTH______________
NO. OF INSULATION TYPE___________
CONDUCTORS ________________________ _________________
MANUFACTURER ________________________ LINE VOLTAGE _____________
TEMPERATURE ________________________ HUMIDITY _________________
MEGGER TYPE ________________________ SERIAL NUMBER ___________
TEST VOLTAGE ________________________ MULTIPLIER ________________
REMARKS ____________________________________________________
CONDUCTOR
NO.
MEGOHMS CONTINUITE CONDUCTOR
NO.
MEGOHMS CONTINUITE
C/C C/S PASS FALL C/C C/S PASS FALL
TEST PERFORMED ________________________ _________________
BY: Signature Date
TEST WITNESSED _______________________ _________________
BY: Signature Date
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Form 16452-2
SINGLE & MULTIPLE CONDUCTOR POWER CABLE MEGGER TEST, 600V
AND LESS
WIRING – FEEDER CIRCUITS
Testing shall be performed before connecting the cable to the terminals at either end.
Continuity of each conductor shall be checked at this time.
Each conductor shall be checked with a 500 volt megger to ground, with all other
conductors in the cable and shield, grounded. The minimum acceptable megger
resistance shall be 50 megohms for each conductor to ground.
PROJECT NAME ___________________________________________________
FEEDER NUMBER _______________________ LOCATION___________________
CABLE SIZE _______________________ CABLE LENGTH______________
NO. OF INSULATION TYPE___________
CONDUCTORS ________________________ _________________
MANUFACTURER ________________________ LINE VOLTAGE _____________
TEMPERATURE ________________________ HUMIDITY _________________
MEGGER TYPE ________________________ SERIAL NUMBER ___________
TEST VOLTAGE ________________________ MULTIPLIER ________________
REMARKS ____________________________________________________
If Applicable, All shields Must Be Properly Grounded prior to Testing.
Cable No. MEGOHMS
phase A
MEGOHMS
phase B
MEGOHMS
phase C
TEST PERFORMED ________________________ _________________
BY: Signature Date
TEST WITNESSED _______________________ _________________
BY: Signature Date
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3.03 TEST INSTRUMENTS:
A. MULTI-METERS
Multi-meters shall be professional quality, with electronic measuring
circuits fully protected against over voltage, digital readout and true R.M.S
indication. They shall be equipped with sufficient scales to enable any
reading to be at least 60% of maximum scale reading, and accuracy shall be
not less than +/- 5% of full scale.
B. INSULATION TESTERS
Insulation testers shall conform to IEC 61557-2.
C. CABLE FAULT LOCATION SETS
Cable fault location test sets shall measure distance to fault by measuring
time of reflection of test impulse voltage or other method of comparable
accuracy.
D. EARTH CONTINUITY TESTERS
Earth continuity shall be measured according to IEC 61557-3 and IEC
61557-4 by injecting current (generally 25 amperes ) into the circuit to be
tested and measuring voltage drop at accessible points. The use of relatively
high current is required to locate loose or poor connections that would fail
during an earth fault but might not be detected during a low current test
such as using an ohmmeter.
E. EARTHING ELECTRODE OR SYSTEM RESISTANCE TEST SET.
Equipment for Measuring Earth Electrode resistance shall conform with
two test earth electrodes and injecting a current between earth electrode and
a test electrode at a distance from the main earth. A potential electrode is
then inserted and volt drop measured between the ground and the main
earth electrode from which the earth resistance can be measured.
F. TESTING RESIDUAL CURRENT DEVICES
Equipment for testing residual current de4vices shall conform to IEC
61557-6.
G. LUX METER
Utilising a photoelectric cell to measure incident light. The meter shall have
a calibrating light circuit and shall have an accuracy of at least +/-5%.
3.04 TEST INSTRUMENT STANDARDS :
1. Use only equipment for testing and calibration procedures that has the following
characteristics.
A. Maintained in good visual and mechanical condition.
B. Maintained in safe operating condition.
2. Use test equipment having operating accuracy equal to or better than the
following limits:
10
A. Portable multimeters: true RMS measuring.
B. Multimeters shall have the following accuracy limits, or better:
1) AC voltage ranges:75% ±3 last single digits@50 Hz.
2) AC current ranges: 90% ± 3 last single digits @ 50Hz, including
adapters, transducers.
3) DC voltage ranges: 25%± 1 last single digit.
4) DC current ranges: 75% ± 1 last single digit.
5) Resistance Ranges: 50% ± 1 last single digit
6) Frequency Ranges: 10% ± 1 last single digit @ 50 Hz
C. Clamp-on ammeters: AC current ± 3% of range ± 1 last single digit @
50Hz.
D. Dissipation/power factor field equipment.
1. ± 0.1% power factor for power factor values up to 2.0%.
2. 5% of the reading for power factor values above 2.0%.
E. Low-range DC resistance equipment 1.0% of reading ± 2 last dingle digits.
F. Transformer turns-ratio test equipment 0.5% or better @ 50 Hz.
G. Ground electrode test equipment ± 2% of range.
H. Insulation Test Sets: 0-1000V DC ± 20% of reading at mid-scale.
I. Electrical load survey equipment:
1. ± 5% total error, including sensors.
2. 1% resolution.
3. Current transformers ± 2% of range @ 50 Hz.
4. Voltage transformers ± 0.5% of range @ 50 Hz.
J. Liquid dielectric strength test equipment ± 2% of scale.
K. Infrared scanning equipment: sensitivity of 2C.
L. Phase Shifting equipment: ± 1.0 over entire range.
M. High-current test equipment: ± 2% of range
N. DC high potential test equipment . ±2% of full scale.
O. AC high potential test equipment (50 Hz): ±2% of full scale
3.05 TEST
A. LOW-VOLTAGE CABLES AND WIRES
The connection between the neutral and the earth busbar of LV
switchboards and panelboards shall be removed, if any, and all motors and
other loads shall be disconnected, except lighting fixtures, which shall be
connected during the test but with lamps removed.
11
The test voltage shall be applied between all normally live conductors (L1-
L2,L1-L3, L2-L3), between normally live conductors and the neutral
conductor (L1-N,L2-N,L3-N), between normally live conductors and
protective conductor (L1-PE,L2-PE,L3-PE), and between neutral conductor
and protective conductor (N-PE).
The test is satisfactory if the insulation resistance is equal or greater than
1000 Ohm per volt operating voltage E.g. for a 220/127 V system:
Between phases 220.000 Ohm.
Between phases and neutral or earth 127.000 Ohm.
Between neutral and earth 127.000 Ohm
For a 380/220 V system:
Between phases 380.000 Ohm.
Between phases and neutral or earth 220.000 Ohm.
Between neutral and earth 220.000 Ohm
An insulation test shall be performed on direct buried cables before and
after backfilling of trenches and before the installation is put into service.
B. LOW-VOLTAGE SWITCHBOARDS, DISTRIBUTION BOARDS
AND PANELBOARDS
Low-voltage switchboards, distribution boards and panel boards shall be
type-tested and routing-tested according to IEC 60439-1, IEC 60890,
IEC60947, IEC 61117 and IEC 61180-1 in the factory. Only type-tested and
partially type-tested LV switchboards and panelboards shall be accepted for
building installations.
Before handing-over the insulation resistance between phases, phases and
neutral, phased and earth and neutral and earth shall be measured and
recorded.
Functional tests of all switching devices and protection relays, including
manual and motor operation of switchgear, shall be preformed.
The phasing sequence and phase colours/numbers, switchgear labelling,
earthing and bonding shall be checked.
Control voltage for switchgear and protection relays shall be measured.
Cable terminations and connections, setting and correct tripping of
protection and time relays, contactors and alarms, push-button stations,
rating of fuse links, phase balance, correct indication of measuring devices
shall be checked.
C. LIGHTING
Lighting fixtures shall be identified by a safety mark showing the internal
protection (IP) of the luminaries. The mark is shown in the type plate of the
luminary. A type test in an approved test institute shall establish the
protection requirements of an IP class.
After installation of the lighting fixture on site, the following shall be
checked:
12
- Operation of lighting fixture, fitted with lamps of correct
wattage, type and colour.
- Circuit numbering fuse or circuit breaker rating in distribution
panels.
- Luminary earthing
- Light switches.
Lighting levels shall be checked and recorded for all internal areas. Tests
shall be carried out with all external lighting excluded. Maximum, minimum
and average illumination levels shall be measured for all rooms. Measured
values shall be multiplies by 0.7, to allow for depreciation in light output
due to age and soiling. (This factor may be increased to 0.8 if it can be
shown that the lamps have been burning for at least 100hours prior to the
test) Any illumination levels more than 10% below those recommended by
the illuminating Engineering Society shall be brought to the attention of the
engineer.
D. SWITCHES AND SOCKETS
Beside the insulation resistance test of lighting and socket circuits described
above, light switches shall be checked for proper function.
The correct connection and functioning of the protective earthing conductors
of sockets and the tripping of residual-current operated protective devices
(fault –current circuit breakers) of socket circuits in the distribution panel
shall be checked by means of socket testers.
Furthermore the number of socket-outlets per socket circuit shall be counted
and listed
E. POTENTIAL EQUALISATION AND EARTHING
Potential equalisation and earthing in buildings shall be realised and tested
according to IEC 60364-5-54.
For verification of protective measures against indirect contact the earthing
resistance of individual earth electrodes or extended earthing systems for
building earthing shall be measured and recorded.
The test shall be performed at the main earth busbar of the building, with the
earthing connections to the earth electrodes or earthing grid disconnected
from the main earth bar.
The connections of transformer neutrals and transformer rails and
switchgear enclosures to earth shall be inspected for tightness.
The continuity and conductivity of all protective, equipotential and earthbonding
conductors in the building, including socket-earthing contacts shall
be measured and recorded.
The earthing of all exposed and extraneous metallic parts in the building,
clearance distances in bathrooms, ;and proper marking of protective
conductor connections in transformer, switchgear and generator rooms and
in distribution panels shall be checked.
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F. BUILDING CONTROL SYSTEMS
Control systems in buildings shall be tested according to the manufacturer's
instructions and functional tests shall be performed according to
recommendations given by relevant IEC standards for the
G. COMMUNICATION SYSTEMS
Communication systems in buildings shall be tested according to the
manufacturer's instructions.
Functional tests shall be performed, failure and alarm conditions simulated
and all data and alarm indications recorded
All systems involving electronic private branch exchanges (EPABX) shall
be tested on site sand put in operation by the manufacturer's representative.
PART 4– CCOMMISSIONING:
A. Following the satisfactory conclusion of inspections and tests on complete
sections of the works, the Contractor shall duly commission each section of
the electrical installation and leave it in full working order. The term
Commissioning shall be deemed to include:
i. The energizing of electrical distribution circuits and circuits and
equipments which have previously been inspected, tested, found to be
satisfactory and capable of being energize with complete safety.
ii. The setting to electrical protective devices and systems, where relevant,
in accordance with the directions of the Engineer or failing such
directions, in accordance with sound electrical engineering practice.
iii. The starting up of all electrically powered plant and equipment.
iv. The verification of the performance of all such plant and equipment by
the carrying out, where required, of further tests and the making of all
necessary adjustments so as to obtain optimum performance.
B. Compliance with the requirements of this section of the Specification shall
not by itself in any way relieve the Contractor of any of his obligations under
the Contact.
C. The contractor shall ensure that tall connections and adjustments are made
correctly and that the installations and equipment are in a completely safe
and satisfactory condition.
D. All activities carries out by the Contractor in pursuance of the requirements
of this section of the specification shall be carried out, or continuously
supervised, by a competent and experienced commissioning engineer.
E. If considered necessary, the Engineer will set up a commissioning panel to
oversee all activities relating to commissioning of installations, of the panel
14
to act in an advisory capacity assisting the Engineer in all matters relating to
the commissioning process.
F. The Engineer shall have power to appoint and independent commissioning
Engineer to act on his behalf in the control of all activities relating to the
commissioning process, and in such matters the said commissioning
Engineer shall be deemed to be and authorized representative of the
Engineer.
G. The Contractor shall be wholly responsible for ensuring that all switching
operations and all work on electrical circuits and equipment which have
once been energized are carried out in a thoroughly safe manner and shall
operate, and rigidly adhere to an approved permit-to-work system. For this
purpose the Contractor shall appoint an authorized person as defined in the
Electricity (Factories Act) Special Regulations and shall communicate the
name of such person in writing to the Engineer.
H. In appropriate cases the Contractor shall nominate a particular employee as
Switchgear Operator and shall ensure that all switchgear operations are
carried out by the nominated person and that such person is always available
for this duty when required.
I. The Contractor shall prepare a commissioning schedule detailing the plant to
be commissioned, the operations to be carried out, the time scale, with exact
dates for specific operations, details of requirements for water and power
services, and attendance or provisions by others. This commissioning
schedule, in draft from shall be submitted not less than four weeks in
advance of the date on which commissioning is to commence.
J. If required by the Engineer, the Contractor shall present the information
from the commissioning schedule in the from of a flodiagram or a PERT
(Critical Path) chart.
K. The procedures to be followed by the Contractor for commissioning the
electrical equipment and installations shall be as directed by the Engineer or
in the absence of such directions, shall be proposed by the Contractor and
submitted to the Owner's Authorized Representative for approval.
L. No connections or adjustments shall be made to plant or equipment which
has already been commissioned and set to work except with the prior
consent of the Engineer.
M. No plant or equipment shall be charged, energized or operated without the
prior agreement of the Owner's Authorized Representative. All applicable
test certificates shall have been first submitted to the Engineer.
N. All commissioning procedures shall be carried out in a safe and satisfactory
manner and in accordance with the provisions of the Factory Acts, the
Health and Safety at work etc. Act, and the Electricity Regulations.
O. Following completion of commissioning each item or equipment or where
several items of equipment are interdependent, the complete plant shall
operate continuously and satisfactorily under normal operating conditions
for a period of 72 hours without defect of any kind. In the event of any
defect or mal-operation becoming apparent during this period the Contractor
15
shall forthwith determine the cause and rectify it by means of repair,
replacement, adjustment or modification and the reliability run shall be recommenced.
All materials, equipment and labour required to locate and
rectify any such defect shall be provided by the Contractor at his own
expense.
P. No plant, equipment or installation will be considered as complete until the
prescribed commissioning procedures have been satisfactorily carried out
and the reliability run has been completed without untoward incident.
Q. The Engineer shall have power to require that the hole of the plant,
equipment and installations or selected parts thereof, be re-inspected and if
necessary re-tested immediately before the end or the contractual
arrangements with the Owner.
END OF SECTION 16950
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