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Wiring to hook up irrigation pump

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05-22-12, 02:55 PM

tonyvol

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Wiring to hook up irrigation pump

Hi. I'm new to this forum and was wondering if someone could help me out with an electrical question. I have 220 volt pump that calls for a 20 amp breaker and want to hook it up to the disconnect panel box on my house that is fed by the meter. The disconnect on the house is a 200 amp breaker and I was thinking I could install a 60 amp breaker in that disconnect and then have another disconnect at the lake with a 20 amp breaker. I've already run the wire which is 500 ft of aluminum underground AL 2-2-2-4 (two hots, 1 common, 1 ground) from the disconnect on the house to a disconnect I want down by the pump. From the disconnect down at the lake, I want to run 12-2 underground from there to the pump. The question I have is in the disconnect box on the house there is only one bar which has a ground connected to it.(Please see picture). Do I connect the common and ground to this bar or do I need to install another bar, or would I connect the ground wire from the disconnect at the lake to the ground rod at the house? At the house there is a ground rod in the ground which the disconnect on the house is grounded too.

Thanks,
Tony

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05-23-12, 07:38 PM

Zorfdt

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Do I connect the common and ground to this bar or do I need to install another bar, or would I connect the ground wire from the disconnect at the lake to the ground rod at the house?

Yes, the main panel only has one ground/neutral bar. All grounds and neutrals connect to that bar.

At the subpanel, you need two bars, the ground bar bonded to the panel and the neutral bar insulated

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Now that I look at this more closely, I'm not certain you can put a 60A breaker in this panel. You could end up pulling 260A from your feeders, which they likely aren't rated for. Also, I'm not sure why you have a 4-pole 200A breaker...

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