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Old 01-30-2011, 05:02 PM   #1
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Need main panel advice


I'm buying a 1970 house. The main panel is 150 amps, with no ground bus and no main breaker. There is a 60 amp sub panel fed off a 60 amp breaker. Most of the circuits are ungrounded (two wire, no ground) but a few are grounded to the neutral.

Our current house has 150 amp service and it seems to be enough.

I have a friend who is a GC, but not an electrician, who tells me that installing a new panel is no big deal, and the two of us can easily do it (I get the impression he's done it before). I've done electrical things in the past, like outlets and new light fixtures, and even circuits, but a new main panel seems like a different level of skill. Any advice in that regard?

Also, is it a code violation to connect the existing ungrounded circuits to a new panel?

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Old 01-30-2011, 05:36 PM   #2
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Need main panel advice


I don't know whether you can do it. You friend seems to think he can.
It is not a violation to reconnect ungrounded circuits.

It is a very huge violation the ground a two wire circuit to a neutral.

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Old 01-30-2011, 10:20 PM   #3
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Need main panel advice


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It is a very huge violation the ground a two wire circuit to a neutral.
Yeah, that's why we need to replace the panel -- that, and the lack of a main breaker.
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Old 01-30-2011, 10:40 PM   #4
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Need main panel advice


Given the vintage of the house you might have a split-buss panel where the top 6 (or less) breakers act as the main to cut the power to the panel.
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Old 01-30-2011, 11:09 PM   #5
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Yeah, that's why we need to replace the panel -- that, and the lack of a main breaker.
I may have mis read what you meant by grounding the neutral to the ground. At the panel they are bonded together. More accurately at the first disconnect, which is normally the panel, they are bonded.
I thought you meant at the receptacles they were connecting the neutral and ground. That is wrong.
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