Metalic Junction Boxes Used in Extension Cord Make-up

[TVH]

Is it acceptable practicce to use UL listed metalic wall junction boxes[ in the fabrication of extension cords if fabricared by qualifed electrical personnel using UL listed components? If not please identify the specific NEC code violation. Info appreciated.

 

[infinity]

I'm pretty sure that it's an OSHA issue unless the box has a threaded hub. Someone may chime in with the particulars.

 

[roger]

It's not an NEC issue, search OSHA.

 

[don_resqcapt19]

For the application of the NEC, I see that as a pendant supported box, and for that application the code requires the box to have a threaded hub.

 

[LarryFine]

The knock-outs are also weak spots, easily pushed in.

 

[hbiss]

I'm pretty sure that it's an OSHA issue

Me too. I'm pretty sure that OSHA doesn't allow "DIY" extension cords, distribution boxes and extension cords that have been repaired.

-Hal

 

[suemarkp]

OSHA, and the State of WA (and many others) requires all electrical items to be NRTL listed. You can make them, but would need to submit them to a Field Evaluation Body to get it OK'd. That would cost much more than just buying one no matter how much you over pay.

 

[norcal]

I developed quite a dislike for 4X4 boxes combined with a raised device cover, on a extension cord, users would drop them carelessly deforming the cover mounting screws.

 

[electrofelon]

IMO extension cords are not covered by the NEC. As others have said, OSHA has something to say about them however.