NCC Part J6 – Artificial Lighting and Power in Office Buildings (Class 5) Summary - 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) - - 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. - - - Performance Requirements - 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. - - Lighting - - - 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 - - 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. - 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. Page 1 of 5 14/01/2022 NCC Part J6 – Artificial Lighting and Power in Office Buildings (Class 5) APPENDIX 1 Tech Sheet # Page 2 of 5 14/01/2022 NCC Part J6 – Artificial Lighting and Power in Office Buildings (Class 5) APPENDIX 2 Tech Sheet # Page 3 of 5 14/01/2022 NCC Part J6 – Artificial Lighting and Power in Office Buildings (Class 5) APPENDIX 3 Tech Sheet # Page 4 of 5 14/01/2022 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). 02 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). 03 Lighting in a room or space to be individually operated by a switch, control device or a combination of both. 04 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. 06 Motion Sensor or Security Key Reader Control Devices used for 95% of lighting for area > 250m2 07 For Building area > 250m2, lighting in Naturally Lighted Zones to be controlled separately from other Lighting. 08 Natural light zone < 20 m2 or with < 4 luminaires or 70% luminaires within Natural Light Zone 09 Lighting in Fire isolated passageway, stairway, or ramp to be controlled by Motion Sensor. 10 Foyer, Corridor or Circulation Spaces Lighting with IPL > 250W and adjacent to Windows to be controlled by daylight sensors. 11 19 meters of travel in Carpark entry zone to be controlled by daylight sensors. 12 Interior decorative or display lighting to be controlled separately from other lighting by manual switch and if IPL exceeds 1kW by timer switch. 13 Window display lighting to be controlled separately from other display lighting. 14 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. 16 Chili Billi Power supplies to be controlled by Time Switch. 17 Lift Car Lighting and Ventilation to be programmed to turn OFF with 15 minutes inactivity. 18 Lifts to achieve energy performance level as per NCC Table 6.7a (Appendix 3). 19 Lifts to achieve Energy Efficiency Class as per NCC Table 6.7b (Appendix 3). 20 Goods Lifts to achieve Energy Efficiency Class D as per NCC Table 6.7b (Appendix 3). 21 Escalators and Travellators to slow down between 0.2m/s and 0.05m/s with 15 minutes of inactivity. Tech Sheet # Page 5 of 5 14/01/2022