EM Wiring

[Alwayslearningelec]

So I know this but doubting myself for some reason.

Light fixture with an EM battery pack on a normal circuit would need a 12/3 MC cable? Unswitched Hot, Neutral and switch leg?

Light fixture WITHOUT EM battery pack on a normal circuit would need a 12/2 MC cable? Neutral and switch leg?

 

[Knightryder12]

Sounds correct to me. Yes you need the extra "uncontrolled" conductor for the em ballast for charging of the em ballast.

 

[hillbilly1]

So I know this but doubting myself for some reason.

Light fixture with an EM battery pack on a normal circuit would need a 12/3 MC cable? Unswitched Hot, Neutral and switch leg?

Light fixture WITHOUT EM battery pack on a normal circuit would need a 12/2 MC cable? Neutral and switch leg?

Unless it is a 24 hour night light, then 12-2 would be fine.

 

[Alwayslearningelec]

Unless it is a 24 hour night light, then 12-2 would be fine.

Why would 12/3 not be required for EM battery pack fixture?

 

[hillbilly1]

Why would 12/3 not be required for EM battery pack fixture?

Because if it’s a night light (24 hour), it’s charging all the time. If the fixture is switched, then it needs a 24 hour hot to charge the battery. Not all EM fixtures are switched.

 

[hillbilly1]

Unless it is a 24 hour night light, then 12-2 would be fine.

I may have worded this wrong, if it IS a 24 hour night light, then 12-2 is sufficient.

 

[Alwayslearningelec]

I may have worded this wrong, if it IS a 24 hour night light, then 12-2 is sufficient.

Right but if it is a switched em light with battery pack the. 12/3???

 

[hillbilly1]

Right but if it is a switched em light with battery pack the. 12/3???

Correct

 

[Seven-Delta-FortyOne]

Depends on how you run it. If you run to the fixture first, then you just run 12-2 to the fixture box, and a 12-2 switch leg.

If you run to the switch box first, then yes, you will need a 12-3 for the constant hot for the battery.