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Old 03-27-2011, 12:16 AM   #1
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commerical "EM" circuits

guys im a little confused on the basic premise of a EM circuit, as Ive always thought that they were generically called "nightlight" (always hot) circuits... whats the difference?



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Old 03-27-2011, 12:24 AM   #2
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commerical "EM" circuits

do you have an NEC? It defines the use of the term in there. It is covered by section 700.


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Old 03-27-2011, 09:50 AM   #3
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commerical "EM" circuits

Nightlights are for kids...

Emergency circuits are typically normal power circuits that are backed up by either batteries or a generator. Refrigerator/freezers, life safety (fire alarm/smoke det., exit signs, elevators), computer/server rooms, critical-care areas, hospitals all use vast types of back up power systems.
There's a lot more to it than "always on".
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Old 03-27-2011, 10:04 AM   #4
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commerical "EM" circuits

Nightlight circuits are typically circuits with several individual lights on it also with the exit/emergency lights. This circuit stays on all the time. This is typical in a commercial space.
These circuits are quite different from EM circuits.

I get the impression you are an apprentice or something like that. You might be better off discussing this with your boss, j-man and foreman.
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