Feeder/Branch circuits

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Feeder/Branch circuits

#50407 04/01/05 04:19 PM

Joined: Dec 2004

Posts: 1,064

nowhere usa

D

Dnkldorf

OP

Member

Are all circuits leaving a panel board, protected by breakers considered branch circuits only?

Or Feeders also?

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Re: Feeder/Branch circuits

#50408 04/01/05 04:27 PM

Joined: Jan 2003

Posts: 4,391

North Attleboro, MA USA

I

iwire

Moderator

Circuits leaving a panel can be either branch circuits or feeders.

Quote

Branch Circuit. The circuit conductors between the final overcurrent device protecting the circuit and the outlet(s).

Quote

Feeder. All circuit conductors between the service equipment, the source of a separately derived system, or other power supply source and the final branch-circuit overcurrent device.

Bob Badger
Construction & Maintenance Electrician
Massachusetts

Re: Feeder/Branch circuits

#50409 04/01/05 06:22 PM

Joined: Oct 2004

Posts: 135

Newfane, N.Y USA

B

BobH

Member

So if a main panel houses a 60a breaker feeding a main lug sub, the conductors between the 60a breaker and the sub-panel are feeders.

Re: Feeder/Branch circuits

#50410 04/01/05 06:40 PM

Joined: Jul 2004

Posts: 625

Palo Alto, CA, USA

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But, it's not necessarily a "feeder" for purposes of Table 310.15(B)(6).

YMMV.

Re: Feeder/Branch circuits

#50411 04/01/05 07:18 PM

Joined: Oct 2004

Posts: 135

Newfane, N.Y USA

B

BobH

Member

Why would it not necessarily be a feeder? Are you saying it would be a service conductor(s) if this was a separate building? Please elaborate.

Re: Feeder/Branch circuits

#50412 04/01/05 07:49 PM

Joined: Jul 2004

Posts: 625

Palo Alto, CA, USA

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I'll refer you to this discussion about 310:15(B)(6):
https://www.electrical-contractor.net/ubb/Forum2/HTML/001450.html

Re: Feeder/Branch circuits

#50413 04/01/05 08:30 PM

Joined: Oct 2004

Posts: 135

Newfane, N.Y USA

B

BobH

Member

Thanks, that was exhausting but I guess I asked for it.

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ECN Forum Forums General Topics of the Trade General Discussion Area Feeder/Branch circuits