NEC 2014 240.83(D)

[hhsting]

NEC 240.83(D) circuit breakers used as switches. I have emergency battery backup unit on branch circuit with more than three normal lights not multiwire branch circuit and per NEC 700.12(F)(2)(3) says branch circuit feeding unit equipment shall be the same branch circuit as that serving the normal lighting in the area and connected ahead of any local switches. My local switch would be the circuit breaker. I would imagine the lights can be interrupted if the branch circuit breaker to the light trips. If circuit breakers are used as switches then how can 700.12(F)(2)(3) apply?

 

[david luchini]

NEC 240.83(D) circuit breakers used as switches. I have emergency battery backup unit on branch circuit with more than three normal lights not multiwire branch circuit and per NEC 700.12(F)(2)(3) says branch circuit feeding unit equipment shall be the same branch circuit as that serving the normal lighting in the area and connected ahead of any local switches. My local switch would be the circuit breaker. I would imagine the lights can be interrupted if the branch circuit breaker to the light trips. If circuit breakers are used as switches then how can 700.12(F)(2)(3) apply?

The circuit breaker cannot be used as the switch in the application you have described.

 

[LarryFine]

The simplest cure would be switches next to the panel, or contactor(s) controlled by a single switch.

 

[david]

NEC 240.83(D) circuit breakers used as switches. I have emergency battery backup unit on branch circuit with more than three normal lights not multiwire branch circuit and per NEC 700.12(F)(2)(3) says branch circuit feeding unit equipment shall be the same branch circuit as that serving the normal lighting in the area and connected ahead of any local switches. My local switch would be the circuit breaker. I would imagine the lights can be interrupted if the branch circuit breaker to the light trips. If circuit breakers are used as switches then how can 700.12(F)(2)(3) apply?

NEC 240.83(D) I have emergency battery backup unit on branch circuit with more than three normal lights not multiwire branch circuit and per NEC 700.12(F)

Are you saying you have at least three normal lighting branch circuits in an area, or are you saying you have more than three lights in an area, when you say not multiwire branch circuits seems to indicate you are talking about more than three normal lighting branch circuits in an area.

NEC 240.83(D) circuit breakers used as switches. I have emergency battery backup unit on branch circuit with more than three normal lights

 

[hhsting]

Are you saying you have at least three normal lighting branch circuits in an area, or are you saying you have more than three lights in an area, when you say not multiwire branch circuits seems to indicate you are talking about more than three normal lighting branch circuits in an area.

I have one branch circuit supply power to lights in restaurant dinning area , the branch circuit is not multiwire branch circuit and has more than three normal lights.

 

[david]

I have one branch circuit supply power to lights in restaurant dinning area , the branch circuit is not multiwire branch circuit and has more than three normal lights.

Than the exception cannot apply here as others said you must keep power to the unit equipment 24/7 and the unit equipment must be on a lighting branch circuit serving your dinning area

 

[hhsting]

Nightlight can be still be on while the light switch is turned off correct? Instead of wall mounted battery backup, a night light is provided?

 

[LarryFine]

Nightlight can be still be on while the light switch is turned off correct?

Yes. That takes supplying the night-light ahead of any switching.

Instead of wall mounted battery backup, a night light is provided?

No. You still need egress-pathway illumination during a power outage.

The night-light and egress lighting can be supplied by the same conductors.

 

[GoldDigger]

The way unit equipment (internal/local battery backup) is often supplied is with two feeds from the (a) local lighting circuit:
One feed is switched and operates the normal light function. The other is unswitched power from the same circuit.
The unswitched power has two functions, to keep the battery charged and to indicate when lighting power has been lost regardless of whether the local lighting is currently switched on.
If the unit equipment does not have an ordinary lighting function, only the second (unswitched) feed is needed.

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[lordofthisworld]

NEC 240.83(D) circuit breakers used as switches. I have emergency battery backup unit on branch circuit with more than three normal lights not multiwire branch circuit and per NEC 700.12(F)(2)(3) says branch circuit feeding unit equipment shall be the same branch circuit as that serving the normal lighting in the area and connected ahead of any local switches. My local switch would be the circuit breaker. I would imagine the lights can be interrupted if the branch circuit breaker to the light trips. If circuit breakers are used as switches then how can 700.12(F)(2)(3) apply?

So you are saying your lights stay on constant or are controlled by a motion sensor? What it means by stating has to be fed before switch, EBU’s need a constant feed and can’t be on the load side of the switch. Is the breaker listed to be used as a switch, and marked with SWD or HID?

 

[lordofthisworld]

Nightlight can be still be on while the light switch is turned off correct? Instead of wall mounted battery backup, a night light is provided?

A nightlight and EBU are two different things.

“Nightlight can be still be on while the light switch is turned off correct?” Yes but if you lose power the nightlight will also go out, which will leave everyone in darkness, an EBU is battery back up where if power goes out, the EBU will activate and illuminate the area.

An EBU is used for emergency incidents.

 

[lordofthisworld]

Nightlight can be still be on while the light switch is turned off correct? Instead of wall mounted battery backup, a night light is provided?

That would fail according to building code, there should be some kind of emergency lighting if the establishment loses power, where a nightlight just stays on constant but during power failure the nightlight will also lose power, in which with a EBU or an emergency light (light with a iodine ballast) will stay on during power failure giving the area some type of illumination.

 

[hhsting]

That would fail according to building code, there should be some kind of emergency lighting if the establishment loses power, where a nightlight just stays on constant but during power failure the nightlight will also lose power, in which with a EBU or an emergency light (light with a iodine ballast) will stay on during power failure giving the area some type of illumination.

I thought manufacturers of nightlight say it comes with internal battery. Nightlight do not come with internal battery in case of loss of power?

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[lordofthisworld]

I thought manufacturers of nightlight say it comes with internal battery. Nightlight do not come with internal battery in case of loss of power?

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You can make any light a night light but it will not be an emergency light if there isn’t no bodine ballast. But if the lights you are buying states it has an internal battery and the fixture comes with some type of test button then it has a battery and can be used as an emergency fixture.