Mike Dolt Enterprises
Mike Dolt Enterprises
User: Npstewart, Location: Lockport, IL
Asked on: Tuesday, April 12, 2011 at 12:19 pm EDT
Answered on: Tuesday, May 14, 2024 at 4:05 am EDT
Question: Have the following set-up in a office (non required emergency power)A group of lights in office. They are typically going to be fed from a emergency panel and the panel is fed from a transfer switch. Normally the transfer switch will get the power from the utility obviously.I want the lights all to switch off via a timeclock or occ sensor, however I DONT want them to switch if the building on on the generator because I dont think its legal to switch emergency lights.I could either:Make a certain number of lights "night lights", that wont switch at all period so I always have (1) footcandle on the floor regardless.(Or)?Maybe pull two circuits to the lights with some type of relay??? Anyone see another solution rather than having several night lights burning all day? Im looking at a ice-cube relay.Please help.
Option 1: Separate Circuits for Emergency and Normal Lighting
Install two separate circuits: one for emergency lights and one for normal lights. The emergency light circuit would be connected to the emergency panel, while the normal light circuit would be connected to the non-emergency panel. This would ensure that the emergency lights remain on even when the building is on the generator.
Option 2: Interlock System
Install an interlock system that prevents the timeclock or occupancy sensor from switching off the lights when the building is on the generator. This can be achieved using a relay or a power monitor that detects the presence of generator power. When generator power is detected, the interlock system would block the timeclock or occupancy sensor signal, preventing the lights from switching off.
Option 3: Override Switch
Install an override switch that allows you to manually turn on the lights even when the building is on the generator. This switch would be located in a central location, such as the electrical room or the main office. In the event of a power outage, the override switch could be used to restore lighting, regardless of whether the lights were scheduled to be off or not.
Recommendation:
Option 1 or 2 is the most recommended approach as it provides the highest level of compliance and safety. Option 3 is a potential solution but may not meet all building codes and regulations. It is important to consult with a licensed electrician to determine the best solution for your specific application. Flag for review