3.11 LIGHTING INSTALLATIONS
PART 1 GENERAL
3.11.1.1 DESCRIPTION OF WORK:
Indoor and outdoor lighting fixtures, connection to circuit wiring and to corresponding lighting control equipment.
3.11.1.2 FIXTURE DESIGN AND STANDARDS:
The Specification and the Drawings are a guide to the selection of lighting characteristics and lighting fixtures, giving general features of construction, materials, method of installation and conditions of operation. Unless otherwise specified, fixtures are to be manufacturer's standard series, designed and manufactured for the purpose and application required and generally in accordance with the Lighting Fixture Schedule and complying with IEC 598 and CISPR 15.
3.11.1.3 DESIGN LAYOUT:
Fixture layout has been determined from photometric data of specified fixtures to achieve desired level and uniformity of illumination. Check the detailed reflected ceiling plans to ensure exact positions of fixtures with respect to structural members, ducts, pipes, other installations and ceiling panels/tiles, where required. Certain fixtures are shown in provisional positions, pending preparation of final equipment layout drawings. Locate such fixtures in coordination with final equipment layout so that illumination is as intended by the design.
3.11.1.4 EQUIPMENT DATA:
Submit data including, but not limited to, the following: detailed literature on each fixture, lamp and control gear including manufacturer’s name, catalogue number, rating, material specification, overall dimensions, operating characteristics and principles details of changes to standard fixtures to adapt to condition of installation and to the Specification for lighting calculations including polar light distribution curves, coefficient of utilization, glare classification, efficiency, depreciation factors etc.
3.11.1.5 SHOP AND CONSTRUCTION DRAWINGS:
Submit drawings including, but not limited to, the following:
exact position of each fixture on reflected ceiling plans, with indication of ceiling panels/tiles, structural members, ducts, pipes and other fittings, as applicable installation details including suspension and mounting provisions purpose made fixtures or lighting assemblies with full details wiring details, circuit and panel board references, special lighting panel board arrangement etc.
3.11.1.6 SAMPLES:
Submit a fully equipped sample for each fixture type, modified if required. Submit color and texture samples of each fixture.
PART 2 COMPONENTS AND ACCESSORIES
3.11.2.1 LIGHTING FIXTURE CONSTRUCTION - GENERAL
GENERALLY:
Comply with the Regulations and Standards for construction and wiring of fixtures. Fixtures are to be fabricated, assembled and wired entirely at the factory. Manufacturer's name, factory inspection stamp and official quality label are to be fixed to each fixture supplied.
3.11.2.2 LIGHTING FIXTURES (LUMINAIRES):
To be manufacturer's standard, as given in Lighting Fixture Schedules shown on the Drawings, or equal.
3.11.2.3 HOUSINGS:
To be not less than 0.6 mm thick and thicker gauge when required by the Specification or the Standards.
3.11.2.4 SHEET STEEL REFLECTORS:
To be not less than 0.5mm thick.
3.11.2.5 ALUMINIUM REFLECTORS:
To be not less than 0.7 mm thick, unless otherwise approved.
3.11.2.6 FABRICATION
Metalwork is to be mitred, welded and ground smooth without tool marks or burrs. Flat metal parts are to be stiffened by forming grooves and edges during fabrication. Metal parts are to have finish free from irregularities.
3.11.2.7 RUST-PROOF FERROUS BASE:
Ferrous metal parts are to be bonderized (treated with corrosion resistant phosphate solution) and given an approved rust-inhibiting prime coat before application of final finishing.
3.11.2.8 NON-REFLECTING METAL SURFACES:
To be finished with approved baked enamel paint. Paint color on fixture frames and trims is to be as specified or as selected by the Engineer.
3.11.2.9 LIGHT REFLECTING SURFACES:
To be finished with white baked enamel paint having a reflection factor not less than 85%. Mirror reflectors where specified are to be highly polished, anodized aluminium with reflectances of not less than 97%.
3.11.2.10 RESISTANCE:
After finish has been applied on steel surfaces, and cured, it is to withstand a 6 mm radius bend without showing signs of cracking, peeling or loosening from the base metal.
3.11.2.11 RESISTANCE TO ULTRA-VIOLET:
Finish is to withstand 72hours exposure to an ultra-violet RS lamp placed 100 mm from surface without discoloration, hardening or warping, and is to retain the same reflection factor after exposure.
3.11.2.12 HEAT RESISTANCE:
Finishes, wires and components inside incandescent fixtures are to resist high temperatures encountered in the fixtures.
3.11 not less than 1.5 mm2, insulated for 240V application. Insulation is to be of acceptable characteristics to resist maximum temperatures inside the fixtures. Wiring is to be terminated on screw type, fixed insulating, terminal blocks.
3.11.2.14 HINGES:
Fixtures with visible frames and hinged diffusers are to have concealed hinges and catches and stainless steel retaining clips. Other alternative equally durable products are to be submitted for approval.
3.11.2.15 SUSPENSION ALIGNERS:
Are to be provided for pendant fixtures for the purpose of axial, vertical and horizontal alignment. Vertical adjustment is to be a minimum of 25mm.
3.11.2.16 FIXTURES:
Are being constructed to fit into suspended ceilings without distorting fixture or ceiling. Plaster rings are to be provided for plaster or concrete ceilings.
3.11.2.17 OUTDOOR FIXTURES:
Non-ferrous metal or specially moulded material for outdoor use.
3.11.2.18 REMOVAL OF PARTS:
For maintenance is to be possible without removing fixture housing.
PART 3 FLUORESCENT FIXTURES
3.3.11.1 LAMP HOLDERS GENERALLY:
Heavy duty moulded white plastic with non-corroding spring contacts, complying with IEC400.
3.3.11.2 LAMP HOLDERS FOR INDUSTRIAL FITTINGS:
Spring loaded turret type, heavy duty, dust protected.
3.3.3.11 BALLASTS GENERALLY:
Single or two lamp ballasts are to be used in any one fixture. Two lamp ballasts are to be lead-lag, series type. All equipment is to be enclosed in sheet steel casing with corrosion resistant finish. Ballasts are to comply with IEC 82.
3.3.11.4 BALLAST THERMOSETTING COMPOUND:
Is not to soften, liquify or support combustion under any operating condition or upon ballast failure and is to fill ballast enclosure and dampen vibrations. Coil temperature is not to exceed a maximum of 130 deg. C. Temperature rise under normal operating conditions is not to exceed 55 deg. C. over maximum ambient temperature.
3.3.11.5 PROTECTION:
Each ballast is to have a one-time external fuse and fuse holder rated in accordance with manufacturer's instructions.
3.3.11.6 BALLAST TYPE:
Switch start type, unless otherwise noted in Fixture Description shown on the Drawings, power factor corrected to above 0.9, having manufacturer's lowest case temperature. Sound rating is not to exceed level specified in the standards.
3.3.11.7 BALLAST RATING:
Ballast is to be manufactured for the specific lamp it controls and for operation from power supply with voltage and frequency equal to nominal voltage and frequency of distribution network.
3.3.11.8 CAPACITORS:
Are to comply with IEC 566, having snap-type connectors and fastning, bolt type M8, for fixing to fixture.
113.3.9 INCANDESCENT LAMP FIXTURES
INCANDESCENT LAMP SOCKETS:
Are to be high grade porcelain; E27 (ES) screw sockets for lamps not exceeding 200 W and E40 (GES) screw sockets for lamps 300 W and over, complying with IEC 61 and IEC238.
3.3.11.10 HIGH INTENSITY DISCHARGE LAMP FIXTURE TYPE:
Fixtures are to be complete units, including integral ballasts (and ignitors for HPS lamps where indicated) and are to include the number and type of lamps and have lighting distribution characteristics equivalent to model of manufacturer indicated in the FIXTURE DESCRIPTION.
ACCESSORIES:
Fixtures are to be provided with mounting accessories, such as suspension rods or chains, rails or brackets.
BALLASTS AND IGNITION DEVICES:
Are to be designed for operation at 220 V, 60 Hz, power factor compensated to at least 0.9 lagging. Ballasts and ignitors are to be type specially selected for lamp type and size used. Lamp is to start with at least -10% line voltage and continue in normal operation with dips attaining 20% for four seconds. Compensation is to ensure there is no great increase in operating current during starting and that gear losses do not exceed 10% of the normal wattage. RF suppression circuit is to be provided.
PART4 LAMPS
RATED VOLTAGE:
Of incandescent and PL lamps is to be equal to nominal voltage of distribution network. Lamps with different rated voltages are not acceptable.
INCANDESCENT LAMPS FOR GENERAL LIGHTING SERVICE (GLS).
To have screw base, type ES for lamps 200 W and below and type GES for lamps 300 W and above. Inside frosted (IF) lamps are to be used unless otherwise specified. Guaranteed rated life is to be above 800ýhours and luminous output above the following:
950 lumens for 75 W lamps
1350 lumens for 100 W lamps
2200 lumens for 150 W lamps
3100 lumens for 300 W lamps.
REFLECTOR LAMP (R):
For indoor and outdoor use, with silver reflector and prismatic lens. Light beam is to be narrow (spot), wide (flood) or extra-wide (wide flood) as described under FIXTURE DESCRIPTION
TUNGESTUN-HALOGEN LAMP:
Tubular, quartz, resistant to high temperatures. Guaranteed rated life is to be above 2000 hours and luminous output above the following:
9500 lumens for 500 W lamp
22000 lumens for 1000 W lamps
44000 lumens for 2000 W lamp
STRAIGHT TUBULAR FLUORESCENT LAMPS:
Unless otherwise specified, are to be switch start type, bi-pin, rated as described under fixture description and with improved fluorescent internal coating. Color of light is to be 'superb quality white' equal to Philips Nb
1300 lumens for 18 W lamps (600 mm long)
3200 lumens for 36 W lamps (1200 mm long)
5200 lumens for 58 W lamps (1500 mm long).
HIGH PRESSURE MERCURY VAPOUR LAMP:
To include quartz discharge tube in an internally coated ovoid outer tube. Coating is to be vanadate phosphur with color temperature of 3300 deg. K. Lamps are to comply with IEC 188. Guaranteed rated life’s to be above 8000 hours and luminous output above the following:
3800 lumens for 80 W lamps
6500 lumens for 125 W lamps
14000 lumens for 250 W lamps.
HIGH PRESSURE SODIUM LAMP:
Type SONT (tubular) with guaranteed average rated life (down to 80%ýoutput) above 10000 hours, having initial luminous output above the following:
5800 lumens for 70 w lamp
15000 lumens for 150 W lamps
25000 lumens for 250 W lamps
50000 lumens for 400 W lamp
135000 lumens for 1000 W lamp
PART 5 INSTALLATIONS
GENERALLY:
Install fixtures level, aligned and parallel or square to building lines and at uniform heights within one room or area as shown or approved by the Engineer. Make final height adjustment after installation.
FIXTURE SUPPORT:
Provide fixture and/or fixture outlet boxes with hangers, brackets and flanged bolted fittings, as necessary, to support weight of fixture. Submit detailed design of hangers etc. and method of fastening for approval. Rigidly secure fixtures mounted on outlet boxes to fixture studs. Install hooks or extension pieces, when required, for proper installation. Provide one point of support in addition to the outlet box fixture stud for individually mounted fixtures longer than 600 mm.
STEM HANGERS:
Provide two stem hangers for individually mounted pendant fixtures. Stems are to have suspension aligners and are to be of suitable length for suspending fixtures at required height.
SUSPENDED CEILINGS:
If ceiling construction is unable to support weight of fixtures without strain or deformation, suspend fixtures directly from building structure.
SOLID CEILINGS:
Coordinate dimensions of recesses in ceilings with exact fixture dimensions and structural elements.
CONTINUOUS ROWS:
Arrange fixtures so that individual fixtures can be removed without dismantling the remaining fixtures. Provide minimum spacing between fixtures.
COVER PLATES:
Install cover plates over fixture outlet box or opening in ceiling or structure when left unused.
FLUSH RECESSED FIXTURES:
Install to completely eliminate light leakage within fixture and between fixture and adjacent finished surface.
VENTILATION:
Keep ventilation channels free after fixture is installed, if required by the design of the fixture.
EARTH:
Metal frames of fixtures as required in Section 3.10 of the Specification.
TIGHTNESS:
Ensure that enclosed fixtures are reasonably insect/dust tight when installed, and completely weather-proof for installations subject to weather conditions.
LAMPS FOR PERMANENT INSTALLATION:
Place new lamps in fixtures immediately prior to take-over and when instructed by the Engineer. Lamps used for temporary service are not to be used for final lamping of fixtures.
PART 6 INSPECTION AND TESTS ON SITE
VISUAL INSPECTION:
Check neatness of installation, uniformity of equipment and nameplates etc.
ILLUMINATION MEASUREMENTS:
To be at selected locations, to determine level, uniformity and glare.
OPERATION:
Check lighting installations for operation including control and regulation equipment.
ELECTRICAL DATA:
Measure power factor, current and voltage at start for installations with discharge lamps.
End of this section
No comments:
Post a Comment