Yet another wiring - subpanel Q

Secret Squirrel · 2004-02-25T16:18:55+00:00

I have a wiring question that is probably simple but I just want to make sure I do this right. I have a subpanel in my shop that was installed by a professional. He ran #8 AWG from a 60 A breaker in the main panel to another 60 A cutoff breaker in the subpanel. This was my request as he stated that it wasn't necesarry and it probably isn't.Anyway he tied the neutral and the ground together at the ground bar. Is this correct? When adding 110 circuits would I then do the same, place the neutral and the ground both in the ground bar? This just seems counterintuitive somehow. Second but related question: If I do this I will probably run out of spaces on this bar. Can I add a second bar or should I just pigtail a a bunch of the grounds together (which seems like a bad idea) or,...? If I add a second bar how do I secure it in the panel? Any suggestions , in particular what the correct way to do this so it meets code, from those with actual knowledge of the code and relevant material would be greatly appreciated.Thanks

Feb 25, 2004 25 Replies

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Greg 22 years ago

PS use a fixed width font, like courier 10

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Doug Winterburn 22 years ago

It does, NEC 310-16 through 310-19

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Greg 22 years ago

310.16 is the one you use for virtually all building wiring. The 75c column can only be used if the wire is 75c rated and the terminals are also 75c rated. The 90c column is only used for derating purposes. Romex must be used with the 60c column and there is a footnote that limits "small" sizes of any conductor type. That is #14 (15a) #12 (20a) and #10 (30a) unless otherwise permitted.

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Bob Davis 22 years ago

Also, change to fixed width font (Courier New is good).

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Secret Squirrel 22 years ago

"Swingman" wrote in news: snipped-for-privacy@giganews.com:

Thats exactly the piece of info I was missing.. And you're right the ground bar was like $4.50 for a 20 slot bar. I'll get it set up this weekend.

Thanks

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Swingman 22 years ago

You're most welcome. Don't forget that the green/bare ground wire from your feed from the main panel needs to be attached to the new ground bus bar.

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