Mike Dolt Enterprises
Mike Dolt Enterprises
User: shockingdave, Location: Dayton, TN
Asked on: Monday, March 28, 2011 at 11:37 am EDT
Answered on: Tuesday, May 14, 2024 at 3:23 am EDT
Question: I am remodeling a small private school and nursing home. I wanted to verify what I was told. I was told that MC is to be used for the emergency lighting exit signage to connect the power from an existing wall outlet, thus replacing the small whip cords presently being used. Is this correct? and where do I find the rule concerning this?
Correctness of Information
Yes, the information you received is correct. According to the National Electrical Code (NEC), emergency lighting exit signs must be connected to a branch circuit that is powered from the normal power source and a separate branch circuit that is powered by an emergency power source. The connection from the normal power source can be made using metal-clad (MC) cable.
NEC Reference
Article 700.12(B) of the NEC states:> "Emergency luminaires shall be connected to a branch circuit that is powered from the normal source and a separate branch circuit that is powered by an emergency power source. The emergency source shall be capable of supplying all emergency luminaires for a period of at least 1-1/2 hours in the event of failure of normal power supply."Additional Information MC cable is a type of armored cable that provides mechanical protection for the conductors inside. The emergency power source can be a battery, generator, or other approved alternative energy source. The emergency lighting exit signs must be clearly visible and easily recognizable. The emergency lighting system should be tested regularly to ensure it is functioning properly. Flag for review