Electrical panel ground/neutral bus bar question


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Old 05-14-15, 03:52 PM
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Electrical panel ground/neutral bus bar question

In CH type panel CMBE4242B200BTS ( main bus is Copper) , I am trying to replace AL ground/neutral bus bar with copper bus.

The current Ground/Neutral bus in the panel is Tin plated Aluminum ( 6061-T6).
All my wiring is copper. Do you guys see any issues with this ?

Thanks
Diwakar
 
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Old 05-14-15, 04:10 PM
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Welcome to the forums.

Do you guys see any issues with this ?
Absolutely none. The panel was designed to be used with that type bar and copper wiring.

I've seen diecast bars but not copper ones in many years.
Are you sure the bars are aluminum..... I couldn't find any description or specs on them ?
 
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Old 05-14-15, 05:23 PM
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Thanks.

The part is ILSCO ( 8108-86), catalog (NBAE 0924-2).
http://www.ilsco.com/documents/PDF/T...wing/N8108.pdf
which is tin plated aluminum (6061-T6) for ground/neutral bar

I am planning to replace it with "ILSCO N174" which is copper only bar.

My concern is it's connection to panel and to clamp.
 
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Old 05-14-15, 07:27 PM
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I would leave it as is. There is no compelling reason to change it.
 
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Old 05-14-15, 07:52 PM
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Do you guys see any issues with this ?
None at all, I'd also leave it alone. Tin plated aluminum for neutral bus and ground bars is pretty much industry standard.

That's a nice looking piece of equipment. Sliver plated copper bus to accept the breakers is the best way to go in my opinion.
 
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Old 05-14-15, 10:51 PM
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Thanks for comments guys.
I am specifically looking to do it from audio perspective. It may not make any difference but I am trying to reduce the resistance in ground path ( Ground/neutral bar shorted)

This will be my main panel.
 
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Old 05-14-15, 10:56 PM
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That is a listed piece of equipment. Changing parts out violates the listing.
 
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Old 05-14-15, 11:49 PM
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I agree on that front. I will probably leave it as is.
Naive question though, from that perspective, how people buy/replace/use "off the shelf( from leading manufactures) " copper ground/bars since no panel these days are equipped it anyways ?
 
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Old 05-15-15, 06:48 AM
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Naive question though, from that perspective, how people buy/replace/use "off the shelf( from leading manufactures) " copper ground/bars since no panel these days are equipped it anyways ?
Not all panelboards come with a separate ground bar because they are usually not needed, but nearly all panelboards will accept a separate ground bar for the applications when a ground bar is required.

It may not make any difference but I am trying to reduce the resistance in ground path ( Ground/neutral bar shorted)
I doubt that the material the ground bar is made from will make any difference.
 
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Old 05-15-15, 07:58 AM
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I doubt it myself too, but it doesn't cost much to replace those bars anyways as long as it doesn't violate the UL listing of the panel.
By the way, 6061-T6 has about 45% conductivity of copper.
 
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Old 05-15-15, 01:00 PM
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When aluminum conductors are used they are larger than copper for the same ampacity to make up for the difference.
 
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Old 05-18-15, 08:51 AM
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My question

Hi,

Can I replace neutral/Ground (Tin plated aluminum) in
CMBE4242B200BTS panel with ILSCO copper bars ?

Thanks

Reply from Eaton

Since it’s a service entrance panel, the neutral/ground is bonded, so I don’t see any issue with changing to a different ground bar. However if any inspector noticed the difference and called you out on it, we don’t have anything official documentation to back you up in doing this. So I would suggest you hold onto the original neutral/ground in case the inspector says you can’t change it.
 
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Old 05-18-15, 03:04 PM
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Not for Ground/Neutral bar size.
 
 

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