Subpanel box wiring

ibidibi411 · 2008-07-31T17:05:44+00:00

I've got a small Square D breaker box I am wiring for service to ashed that I am having problems wiring.The box will be supplied by 10/2 UF with ground coming from a 30 ampbreaker in my home's breaker box. I have 10/2 NM wire with groundthat is coming into the box. The box will power three circuits: onecircuit with 5 recepticles, one circuit with two recepticles (for asmall A/C and dorm fridge) and one circuit with some lights. Eachcircuit is run from a 20 amp breaker in the box using 12/2 with groundwire. The problem is that I'm not exactly sure how to wire-up thebox. I have a diagram of the box here:'s the way I think this should go:I have two connectors above each of the two breakers, so I assume Ishould pigtail the black wire coming from the feeder and connect thosewires to the connectors over the breakers. Then connect each of theblack wires going leaving the box for the three circuits to one of theconnectors actually on the breakers themselves.Then I would pigtail the white and ground for each circuit togetherand connect them to one of the four connectors on the center part ofthe bar to the right of the breakers. Then I would connect the whiteand ground wires coming from the feeder to each of the bigger posts onthe top and bottom of the bar to the right of the breakers.For the pigtail going to the circuit breakers I would use a red wirenut and 10 gauge black wire. For the pigtails going to the neutraland ground posts I would use a red wire nut and 12 gauge white wire.Here's what I think it would look like: I way off base here?? There is no separate ground bar in thisbreaker box, so I assume all the grounds go to the neutral bar on theright. Since there are only four connectors on that bar I seem tohave no choice but to connect the neutrals and grounds together.I have a qualified electrician checking my work, but he isn'tavailable for a few days and I don't want to make a mess. The circuitwill not be energized until the electrician checks it out and...

Jul 31, 2008 60 Replies

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ibidibi411 18 years ago

Hey thanks Steve! I may have to live in there if I keep working on it like this... My wife might exile me to it.

Seriously, I plan to build guitars in it. I've got a workbench built and have various saws and drills and such mounted on stands now. I've also thought about putting in a futon, dorm fridge, microwave, big screen TV... Run cable from the house... :)

John

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