Hey guys got a job to install power for block heaters for diesel trucks. I have 2 inch rigid underground coming to each of the 5 areas . I'm going to mount a jbox and use the rigid as its supports. The question i have is can I then mount a light or receptacles or an additional j box on top of the 1 that has the pipe supports. So its a 12x12x6 j box mounted to 2 runs of 2inch rigid . I would like to mount right of this j box but not sure if it allowed not really understanding the codes on this. Thanks in advanced
J boxes and mounting receptacles or light fixtures from them.
- Thread starter 2xcheck
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texie
Senior Member
- Location
- Fort Collins, Colorado
- Occupation
- Electrician, Contractor, Inspector
What you are proposing is not code compliant even without the extra light and/or box. See 314.23 (F). Also wondering how many conductors are in that 2" conduit as it sounds like derating may be required.
Post 3 raised some additional red flags. Depending on your conduit entries with a #4 conductor a 12x12 box may not meet the requirements of 314.28. Once you broach those problems it sounds s if you will need to mount individual overcurrent protection panel and receptacle boxes to your larger j box. To assure the install meets Code you might want to get help from a professional.
- Location
- Illinois
- Occupation
- retired electrician
That still may not be big enough, many apply the 2nd to the last paragraph in 314.28(A)(2) even where the conductors are being spliced.
Note that the code language is not really clear, as it is not really the same physical conductor if the conductor is spliced.
As far as the original question, provide independent support for the box, install a power distribution block, and branch circuit fuses in the box, cut the receptacles into the box cover and install bubble covers.
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