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Old 01-22-2015, 06:25 AM   #1
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Default Is AC home run feeder or branch circuit?

Stupid random thought... If a feeder differs from a branch circuit in that it is between the main OCPD and downstream OCPD, would an AC condenser with its own disconnect be on a feeder?

I don't have a lot of experience wiring ACs but it seems like the disconnect is just a breaker, right?
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Old 01-22-2015, 06:31 AM   #2
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The disconnect is a disconnect, but even with an OCPD its function is still a disconnect... ok thinking about this you make a really valid question
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Old 01-22-2015, 06:52 AM   #3
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If the disconnect has OCP (not one of those breakers that does not have OCP), then by definition, the circuit from the panel to the disconnect is a feeder.
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Old 01-22-2015, 07:08 AM   #4
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From art 100>, it would appear your AC may qualify as 'Branch Circuit, Individual' Dielectric...

Quote:
Feeder. All circuit conductors between the service equip-
ment, the source of a separately derived system, or other
power supply source and the final branch-circuit overcur-
rent device.
Quote:
Branch Circuit. The circuit conductors between the final
overcurrent device protecting the circuit and the outlet(s).

Quote:
Branch Circuit, Appliance. A branch circuit that supplies
energy to one or more outlets to which appliances are to be
connected and that has no permanently connected lumi-
naires that are not a part of an appliance.
Quote:
Branch Circuit, General-Purpose. A branch circuit that
supplies two or more receptacles or outlets for lighting and
appliances.
Quote:
Branch Circuit, Individual. A branch circuit that supplies
only one utilization equipment.
Quote:
Branch Circuit, Multiwire. A branch circuit that consists
of two or more ungrounded conductors that have a voltage
between them, and a grounded conductor that has equal
voltage between it and each ungrounded conductor of the
circuit and that is connected to the neutral or grounded
conductor of the system.
~CS~
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Old 01-22-2015, 07:12 AM   #5
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Yes, I wote a proposal for this because it makes no sense that a circuit to an a/c is a feeder in one case and a branch circuit in another. We'll see what they say.

When I brought this up at our yearly state meeting in Raleigh the cmp member agreed that technically it was a feeder when overcurrent protective device is installed in the disconnect but it should be treated as a branch circuit. That, of course , is his opinion. I happen to agree
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Old 01-22-2015, 11:53 AM   #6
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Quote:
Originally Posted by Dennis Alwon View Post
Yes, I wote a proposal for this because it makes no sense that a circuit to an a/c is a feeder in one case and a branch circuit in another. We'll see what they say.

When I brought this up at our yearly state meeting in Raleigh the cmp member agreed that technically it was a feeder when overcurrent protective device is installed in the disconnect but it should be treated as a branch circuit. That, of course , is his opinion. I happen to agree
What is different if the conductor from the panel to disconnect is a "feeder" vs a "branch circuit"?
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Old 01-22-2015, 01:36 PM   #7
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Charlie said it well but I thought a feeder fed another panel and a branch circuit came from a panel to an outlet or other point of use like an a/c unit.
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Old 01-22-2015, 01:40 PM   #8
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Quote:
Originally Posted by bobelectric View Post
Charlie said it well but I thought a feeder fed another panel and a branch circuit came from a panel to an outlet or other point of use like an a/c unit.
"a feeder fed another panel"

Kinda true, but what defines a panel? An AC disconnect with an OCPD is essentially a 2 space panel.
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Old 01-22-2015, 04:38 PM   #9
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Quote:
Originally Posted by Stumped View Post
"a feeder fed another panel"

Kinda true, but what defines a panel? An AC disconnect with an OCPD is essentially a 2 space panel.
I don't agree on that one. I would call that a service disconnect fed by a branch circuit.
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Old 01-22-2015, 04:40 PM   #10
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It's not a panel, but if it's fused it is the "final branch-circuit overcurrent device." That makes it a feeder by the Article 100 definition CS posted above.
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Old 01-22-2015, 08:00 PM   #11
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Ok, I can see that but not at the residential level. If I run a 480 volt circuit to a 3 Ø 60 amp disconnect and fuse down for a compressor, I'd call that circuit a feeder. Same,but different.
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Old 01-22-2015, 08:08 PM   #12
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Which would you call a feeder? From the panel to the fused disconnect or from the disconnect to the compressor? The first is a feeder, the latter is a branch circuit. The definitions are the same for commercial and residential.
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Old 01-22-2015, 08:11 PM   #13
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Quote:
Originally Posted by bobelectric View Post
I don't agree on that one. I would call that a service disconnect fed by a branch circuit.
If it's got an OCPD in it, it's more than just a disconnect.

Would you agree with this:

If I take a 12-2 and run it to a junction box and splice 2 other 12-2 cables onto it, it's a branch circuit.

If I then replace that junction box with a 2-space panel or an AC disconnect with an OCPD, that 12-2 now becomes a feeder.
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