Mixing wire gauges/circuits in same box
#1
06-26-14, 03:16 PM
Mixing wire gauges/circuits in same box
I have a junction box in the basement that contains wires from 3 circuits. a 15a,20a and a 30a. Is it bad practice to have mixed gauges (or multiple circuits for that matter) in the same junction box?
Last edited by pcboss; 06-26-14 at 03:44 PM.
In commercial jobs we have installed j-boxes, and seen others installed, that have 30+ circuits in them.
#3
06-26-14, 03:52 PM
Forum Topic Moderator
Mixed circuits are fine in the same junction box. All the grounds need to be spliced together.
#4
06-26-14, 11:39 PM
Member
Not a problem. Just yesterday I had a J-Box with 4/0 Aluminum on a 200A breaker all the way down to #12 copper on a 20A breaker all in 1 box.
