panel swap

suemarkp

Senior Member
Location
Kent, WA
Occupation
Retired Engineer
Most likely yes. The cable clamp is listed for certain combinations of cables. You're probably not going to find one rated for more than 2 cables. There is a very specific method where you can have a large pipe stub coming out of the panel top. But it is very fussy and specific for how you do it and I can't find that section in the code book. It just seems easier to run 2 cables through each knockout using a clamp rated to hold 2 cables of that size.

If this is residential and the cables are NM, it gets more confusing as older NM cable is fatter than newer NM-B. The clamps and staples don't always differentiate which cable type they are talking about.
 
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