Limited Number of Knock-Outs on Panel

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  #1  
Old 05-17-20, 11:06 AM
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Limited Number of Knock-Outs on Panel

My breaker panel has a limited number of knock-outs on the right-hand side.
Can I use a larger connector for 4 new NM circuits through a bigger knock-out?
 
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Old 05-17-20, 11:23 AM
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A connector is designed for a certain amount of cables.
You can't put more cables in a larger connector just because they can fit.
In your application you can use twin cable connectors. Two cables in one KO.

Duplex connectors
 
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Old 05-17-20, 12:31 PM
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You can also drill your own 1/2" KO's using a hole saw.

I recomend a carbide hole saw like this: https://www.amazon.com/EZARC-Carbide...s%2C189&sr=8-2
 
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Old 05-17-20, 12:34 PM
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Good point Tolyn.

If you do decide to drill your own holes...... do that first and save existing ko's or a few for future wiring. It can be hard to drill holes once cables are in the panel.
 
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Old 05-17-20, 02:52 PM
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Hi, these may be a good choice, not need to mess with locknuts, also good for 2 cables.
https://www.homedepot.com/p/3-8-in-N...7515/100197570
Geo
 
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Old 05-17-20, 05:03 PM
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The connectors that Geo posted are my least favorite connectors as they are VERY difficult to remove. These are my go to: https://www.homedepot.com/p/Arlingto...-100/202245823 They will also take 2 cables each and also come in 3/4' if needed.
 
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Old 05-18-20, 06:28 AM
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Other options for making holes in the panel are step drills and hole punches. Hole punches create the least amount of metal chips requiring cleanup.
 
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Old 05-18-20, 08:49 AM
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A standard 3/8" NM connectors (aka Romex connectors) can take 2 NM cables. (up to 12 AWG)
The one PJmax suggested is required if using AC or MC cables.

Plastic ones works too, but I like metal ones better for easier removal later.
 
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Old 05-18-20, 09:06 AM
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Greenlee hole punches work great, with low mess. Iím done using mine. hint..hint.
 
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Old 05-18-20, 07:08 PM
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I agree about the connectors linked by Geo. Absolutely one of the least user friendly connectors made.
 
 

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