NCC Part J6 – Artificial Lighting and Power in Office Buildings (Class 5)
Summary
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Guidelines to verify the design of Lighting & Power
installations for an Office Building to meet the NCC
requirements.
Lighting, Illumination Power Density, Illumination Loads
Decorative, Display, Exterior and Façade Lighting
Lighting Control Devices and Uses
Naturally Lit Spaces
Multiple Lighting Systems
Boiled / Chilled Water Storage
Lifts, Escalators and Travellators.
Excluded Lighting installations and locations.
National Construction Code (NCC)
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Control
A building, including its services, must have features that
facilitate the efficient use of energy. Of particular interest
for this document is Part J6, which outlines the minimum
requirements for the Artificial Lighting and Power Energy
Efficiency.
Control equipment to be 1-way & 2-way switches, Presence
& Absence Motion Detectors, Daylight sensors, Dynamic
control devices such as DALI, Dynalite, DMX etc.
Control requirements do not apply for areas where 24-hour
occupancy is needed such as airport control towers.
Overview
Use of these Guidelines are recommended for design of
Lighting and Power within Class 5 Buildings (Offices), to
conform to Part J6 NCC Requirements. The Illumination
Power Density (IPD) is a Lighting parameter of reference
that is used for conformance. Control equipment, extend of
their control and location also govern conformity to the
requirement as is shown in the following sections. The NCC
Part J6 requirements are not applicable to Emergency
Lighting installations, Heaters also serving as Lighting
(within Bathrooms), Plant Grow Wall Lighting and Lighting
in Detention Centers.
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Performance Requirements
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The performance requirements for energy efficient
installation of lighting and power within buildings are
shown in sections that follow which are based on the
Service & Control thereof.
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Lighting
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Decorative / Display Lighting IPL above 1kW to be
controlled by time switch.
Window Display lighting to be separately controlled
from other Display lighting.
External Artificial lighting (IPL < 100W), attached to or
directed at the building façade must be controlled by
daylight sensor or time switch with varied
programmable capabilities for hours and days of
switching.
External Artificial lighting for (IPL > 100W), 90% of
lighting load to be of LED luminaires or controlled by
motion sensors or separate time switch if used for
decorative purposes like façade lighting.
The aggregate sum of the Illumination power Loads (IPL)
of all areas within the building must be less than the
total sum of individual areas multiplied by the maximum
allowable IPD for each area as shown in Table J6.2a
(Appendix 1).
Maximum allowable IPD for each area (from Table
J6.2a) can be adjusted as per adjustment factors
available from Table J6.2b (Appendix 2) and Table J6.2c
(Appendix 3)
Areas with Multiple Lighting systems to include IPL of all
systems.
If the Control devices for Multiple lighting systems
allows only one lighting system to work use formula for
IPL: IPLMULTIPLE=[HxT/2+Px(100–T/2)]/100 where H: Largest IPL,
Artificial Lighting in all rooms within the Office building
to be controlled by a switch or other control devices,
located in a visible and accessible location within the
room or in an adjacent room with 90% visibility of the
switched lights.
Control to be limited to artificial lighting within an area
of less than 250m2. Not applicable in Plant room or lift
motor room or workshop where power tools are used.
Artificial lighting serving area more than 250m2 must be
controlled by time switch or security key card reader or
a motion sensor. Not applicable in Plant room or lift
motor room or workshop where power tools are used.
Artificial lighting for fire isolated stairway, passageway,
or ramp to be controlled by motion sensor.
Artificial lighting adjacent to windows in a Foyer,
Corridor and other circulation spaces with IPL more that
250W to be controlled by daylight sensor and dynamic
lighting control device.
Artificial lighting for the first 19m of travel in a carpark
park entry zone must be controlled by day light sensors.
Lifts, Escalators and Travellators
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Lifts to be configured such that artificial lighting and
ventilation within the lift car to be turned off when
unused for 15 minutes
Lifts to achieve idle and standby energy performance
level as per Table 6.7a (Appendix 3).
Lifts to achieve energy efficiency as per Table 6.7b
(Appendix 3)
Dedicated goods lifts to achieve energy efficiency
within Class D as per Table 6.7b.
Escalators and Travellators to have abilities to slow
down between 0.2m/s and 0.05m/s when unused for
more than 15 minutes.
T: time (in percentage) for Max IPL occurrence, P: predominant IPL.
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Decorative / Display lighting for areas such as foyer
mural or art display to be controlled separate to other
artificial lighting by manual switch for each display area
(combined if lighting operation times are the same).
Tech Sheet #
Boiling / Chilled Water Storage Power supply
- Boiling and Chilled Water Storage Power supplies to be
controlled by time switch.
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NCC Part J6 – Artificial Lighting and Power in Office Buildings (Class 5)
APPENDIX 1
Tech Sheet #
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NCC Part J6 – Artificial Lighting and Power in Office Buildings (Class 5)
APPENDIX 2
Tech Sheet #
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NCC Part J6 – Artificial Lighting and Power in Office Buildings (Class 5)
APPENDIX 3
Tech Sheet #
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NCC Part J6 – Artificial Lighting and Power in Office Buildings (Class 5)
APPENDIX 4
CHECKLIST FOR VERIFICATION OF COMFORMITY (CLASS 5 – OFFICE BUILDING)
01
Aggregate of Illumination Power loads (IPL) for all areas in the building not to exceed the total of areas multiplied by
individual maximum IPDs required for that area as per Table J6.2a (Appendix 2).
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For Multiple lighting systems IPL should include all lighting systems. For a system operation at a time, use the largest
IPL of the two lighting systems. IPL for multiple systems may be determined by formula (see tech sheet).
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Lighting in a room or space to be individually operated by a switch, control device or a combination of both.
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Control Devices to be present within the room or utmost adjacent room only if 90% lighting visible from within the
adjacent room.
05
Control Devices to operate lighting for only area < 250m2.
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Motion Sensor or Security Key Reader Control Devices used for 95% of lighting for area > 250m2
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For Building area > 250m2, lighting in Naturally Lighted Zones to be controlled separately from other Lighting.
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Natural light zone < 20 m2 or with < 4 luminaires or 70% luminaires within Natural Light Zone
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Lighting in Fire isolated passageway, stairway, or ramp to be controlled by Motion Sensor.
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Foyer, Corridor or Circulation Spaces Lighting with IPL > 250W and adjacent to Windows to be controlled by daylight
sensors.
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19 meters of travel in Carpark entry zone to be controlled by daylight sensors.
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Interior decorative or display lighting to be controlled separately from other lighting by manual switch and if IPL
exceeds 1kW by timer switch.
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Window display lighting to be controlled separately from other display lighting.
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External Lighting (with IPL<100W) controlled by daylight sensor or time switch.
15
External Lighting (with IPL>100W) to have 90% LED luminaires or be Motion Sensor / Time switch controlled.
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Chili Billi Power supplies to be controlled by Time Switch.
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Lift Car Lighting and Ventilation to be programmed to turn OFF with 15 minutes inactivity.
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Lifts to achieve energy performance level as per NCC Table 6.7a (Appendix 3).
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Lifts to achieve Energy Efficiency Class as per NCC Table 6.7b (Appendix 3).
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Goods Lifts to achieve Energy Efficiency Class D as per NCC Table 6.7b (Appendix 3).
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Escalators and Travellators to slow down between 0.2m/s and 0.05m/s with 15 minutes of inactivity.
Tech Sheet #
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