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30 amp 220V on 10/3 - need to split into 2 - 15 amp - 110v receptials in shed.

30 amp 220V on 10/3 - need to split into 2 - 15 amp - 110v receptials in shed.


Old 11-28-13, 01:37 PM
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Question 30 amp 220V on 10/3 - need to split into 2 - 15 amp - 110v receptials in shed.

I currently have a single 30 amp 220V circuit on 10/3 wire (3 plus Ground) that terminates out in my shed and I need to split it out into 2 - 15 Amp – 110v receptacles each having a GFI outlet.

The questions I have are:
1. Can I use the white/Neutral in the existing cabling for both GFI outlets and split out each leg of the power side (Red and Black) to the GFI’s?

2. or do I need to install a 2 breaker junction box then split it out?

If I look at the diagrams for a small junction box and doing it with out, they appear to be the same diagram.
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Old 11-28-13, 02:41 PM
PJmax's Avatar
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Welcome to the forums.

Yes...you will share the neutral between the receptacles but a 2 circuit breaker box would be the best way to handle the job. You'd put in two single 15A breakers.

You'd also need to pick up a small ground bar for that breaker box.
Old 11-28-13, 02:50 PM
ray2047's Avatar
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If you did it without a breaker box the breaker would have to be reduced to 20 amps because general purpose 120v circuits can not be greater then 20 amps.
Old 11-28-13, 04:13 PM
Join Date: Mar 2010
Location: USA
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I would suggest a 4 or 6 circuit breaker box (subpanel) out in the shed for future expansion capability. The breaker for the circuit back at the main panel would stay as 30 amps. You could install just two 15 or 20 amp breakers in the subpanel for now.
Old 11-28-13, 07:55 PM
Tolyn Ironhand's Avatar
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I agree with the others. Adding a small sub panel would be a good option and would only add $30 for a panel and a ground rod.

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