220 Ground Wire Size. - Electrical - DIY Chatroom Home Improvement Forum

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Old 01-30-2010, 08:01 PM   #1
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220 Ground wire size.

I plan to run single conductor #6 to another part of my garage. It will power a small 220 welder and a few other tools. I have enough #6 to supply the two line supplies and enough #8 for the ground.
Will this be OK?
I ask this because I have seen a lot of romex type cable with the ground being a smaller gauge.
What is the ruling and what needs to be considered conserning the size of the ground in a 220 circuit?
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Old 01-30-2010, 08:11 PM   #2
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Does all of the equipment use the same receptacle as the welder.
If you have enough wire, run 3 #6, and a #8, using the third #6 as a neutral, and insatll a 4 circuit subpanel.
You can then run a couple of different size circuit for the equipment.
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Old 01-30-2010, 08:22 PM   #3
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The ground size is based on the breaker size, not the wire.

A #10 ground is good for any circuit up to 60 amps, #8 is 100 amps.

You can go larger, but not smaller.

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