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Registered
Join Date: Nov 2003
Location: Seattle
Posts: 1,247
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Attn Sparky: Need subpanel tips
I'm putting a 60amp sub in my garage and I've run the conduit and I'm about ready to pull 4 #6 leads. 2 hot, 1 neutral, 1 grounded to main.
Do I need to install a separate ground rod at the sub location or is gounding to the main enough? All leads are insulated. Should the ground be bare? There will be a hot water tank in the garage. Is there any reason why I cannot put the sub box near the H2O tank? - like within a foot or two. Any other suggestions on box location? Or things I should look out for? Thanks.
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03-25-2005, 12:33 PM
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Parrothead member
Join Date: Jul 2003
Location: Monmouth county, NJ USA
Posts: 13,829
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How far is the sub from the main? You shouldnt need a seperate grounding rod. Then again check your local codes also
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03-25-2005, 01:00 PM
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Registered
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Location: Seattle
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Sub is 40 feet from the main.
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03-25-2005, 01:12 PM
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Too big to fail
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When I built my garage, I had to run a ground wire X (I think 15) feet through the foundation, IIRC this is called "Ufer" (sp?) ground. You will also need a grounding bar in the sub panel. If the "ufer" ground isn't possible (ie existing structure) then I think you'd need to drive a rod. An electrician gave me an explanation of why this was necessary, and it sounded good, but I can't recall it with enough detail to repeat it.
In this picture, the larger of the two grounds goes into the foundation, the other goes to the main panel. 
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"You go to the track with the Porsche you have, not the Porsche you wish you had." '03 E46 M3 '57 356A Various VWs Last edited by widebody911; 03-25-2005 at 03:48 PM.. |
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03-25-2005, 03:35 PM
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