Neutral lug kit thread dilemma

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Old 07-10-14, 04:46 AM
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Neutral lug kit thread dilemma

I've installed a Square D QO 70 amp sub panel off my old Cutler Hammer (CH) and because of the wire is 4awg copper it won't fit into the neutral bar of the CH. I went out and purchased an Eaton neutral lug kit made for both BR and CH, however my CH panel's neutral bar set screws are 5/16"-24 and not the smaller 1/4" that came with the kit. I see myself left with only two options, the first is getting a bolt on lug and a 5/16-24 bolt to attach it or a forked lug that fits into two neutral bar spaces. I can't get a forked lug that is specific for Cutler Hammer CH, but I did find one that fits. I also purchased a bolt on lug and a 5/16-24 bolt. Can someone tell me if one or the other is a better idea and can a zinc /yellow zinc coated bolt be used to bolt on the lug to the neutral bar? Thanks
 
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Old 07-10-14, 04:55 AM
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Normally #4 is the largest that will fit in the holes in the bus. CH might have different size holes in the bus instead of one size.
 
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Old 07-10-14, 02:30 PM
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Hi

Just had the exact problem two days ago.... Except the Sub is a Eaton BR.

I could not find a lug that would fit the CH panel. Found a bolt that would fit but it was too long.

I used two of these (one for ground and one for Neutral) for a #1 AL wire.

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Passed inspection last night. Had to get it at a electrical supply store - the ones at the big box didn't handle #1. I think they do handle #4 however.

M
 
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Old 07-11-14, 02:22 PM
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Thanks for the replies. I grabbed a couple different forked lugs and hopefully one will fit. I don't think the neutral bar can accept #4, but I will check again. Sadly the neutral will never carry more than 20-30 amps back, but I didn't want to undersize it.
 
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Old 07-11-14, 06:12 PM
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I don't think the neutral bar can accept #4, but I will check again.
If you check the fine print on the label inside the panel door, the wire sizes the neutral bar will accept might be mentioned.
 
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