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christech
Running Feeds into Main Service Panel

Hello All,

I am running 17 feeds to my 200 AMP service panel in the basement. The panel is a 200 AMP Cutler-Hammer panel. There are several holes on the top of the panel for the cable clamps however there is not enough to support 17 feeds each having their own entrance hole. So my question is: Is it allowed to have more than one feed enter the box through the same hole/cable clamp?

Thanks,

Chris

NEC
Re: Running Feeds into Main Service Panel

Just check the listings on the clamps you want to use.

Ernie_Fergler
Re: Running Feeds into Main Service Panel
christech wrote:

Hello All,

I am running 17 feeds to my 200 AMP service panel in the basement. The panel is a 200 AMP Cutler-Hammer panel. There are several holes on the top of the panel for the cable clamps however there is not enough to support 17 feeds each having their own entrance hole. So my question is: Is it allowed to have more than one feed enter the box through the same hole/cable clamp?

Thanks,

Chris

An allowable practice to is use a 3/8 Romex connectors with two 12/2 feeds passing though.
I did think I read where in is not allowed in Canada, though.
Any thoughts on that?:confused:

christech
Re: Running Feeds into Main Service Panel

Ernie,

Thanks for the clear reply.

Also, thanks NEC, however I find myself scratching my head when I read some of your replies.

Regards,

Chris

NEC
Re: Running Feeds into Main Service Panel
christech wrote:

Ernie,

Thanks for the clear reply.

Also, thanks NEC, however I find myself scratching my head when I read some of your replies.

Regards,

Chris

Thanks!.........

Ernie_Fergler
Re: Running Feeds into Main Service Panel
NEC wrote:

Thanks!.........

I scratch my head when I proof read my replies. An analog man in a digital world.:rolleyes:

NEC
Re: Running Feeds into Main Service Panel
Ernie_Fergler wrote:

I scratch my head when I proof read my replies. An analog man in a digital world.:rolleyes:

You put it well.

Re: Running Feeds into Main Service Panel
NEC wrote:

Just check the listings on the clamps you want to use.

Way to make it confusing ... using words like check and clamp ... pffft

canuk
Re: Running Feeds into Main Service Panel
Ernie_Fergler wrote:

I scratch my head when I proof read my replies. An analog man in a digital world.:rolleyes:

NEC wrote:

You put it well.

Here .. Here ;)

christech
Re: Running Feeds into Main Service Panel
Lloyd wrote:

Way to make it confusing ... using words like check and clamp ... pffft

Lloyd,

What does one check for on the cable clamp? Does the cable clamp specify the number of wires allowable through the clamp? Overall, is there a limit to the number of wires that I should run through the hole in a 200 AMP box? For example, if I run a 3 wire 12/3 and a 12/2 will I get flagged by the inspector? What's your experience?

Thanks,

Chris

Re: Running Feeds into Main Service Panel
christech wrote:

Lloyd,

What does one check for on the cable clamp? Does the cable clamp specify the number of wires allowable through the clamp? Overall, is there a limit to the number of wires that I should run through the hole in a 200 AMP box? For example, if I run a 3 wire 12/3 and a 12/2 will I get flagged by the inspector? What's your experience?

Thanks,

Chris

The best answer is sometimes. I have seen inspectors say you cant , you shouldn't, its fine etc etc. In my opinion using 12 wire you can have 5 current carrying #12 conductors through one 3/8" steel nm connector but only 3 or 4 with 14. and yes a nuetral is a "current carrying conductor" You would probably be ok with a 12/3 and 12/2 in the same connector. I have certainly seen much much worse. Probably even ok with a 14/2 and a 14/3 under the same one, 2 12/3 or 14/3 would be excessive. You could get the fill specs from the manufacturer, but its really not that big of an issue. The fact that your using a steel or cast connector over plastic is IMO a sign that your trying to use the best method. I really think you will be fine but if want some reasurance post the number and size of all the wires going in and the number and size of knock outs and we can get more specific.

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