Metal 4 x 4 square box on an extension cord.

[steve61]

I have an extension cord at work with a metal 4 " x 4" box with a receptacle in the box. It is a short extension cord from a 480 volt receptacle. Is this metal box alright, Or do I have to replace the box ?

 

[roger]

Assuming you are talking about a common 4"square the box is a no. It's an OSHA issue and fine.

 

[infinity]

I agree with Roger although I see this often typically in box box stores. You'll need a box with an integral hub not KO's like in a 1900 box.

 

[VirutalElectrician]

I agree with Roger although I see this often typically in box box stores. You'll need a box with an integral hub not KO's like in a 1900 box.

Something like this?

 

[roger]

Probably not. I think the rules are in OSHA 1926 sub part K

 

[g-and-h_electric]

I now have a question based upon the comments of the box needing a hub not ko's. Would either s "westherproof box, or s PVC box with appropriate cord grip NOT a romex or "take-all" connector be acceptable?

 

[roger]

I now have a question based upon the comments of the box needing a hub not ko's. Would either s "westherproof box, or s PVC box with appropriate cord grip NOT a romex or "take-all" connector be acceptable?

Researching the OSHA rules would be your best bet.

https://www.osha.gov/laws-regs/standardinterpretations/1992-03-03#:~:text=The cord set must be,and shall be electrically continuous.

1. The cord set must meet all applicable requirements of Subpart K. For example, the assembly must be marked appropriately (1926.403(g)); boxes intended for use in a permanent installation may not be used (1926.403(b)(1)(i)); cords must be connected to devices and fittings so as to provide strain relief (1926.405(g)(2)(iv)); cords passing through holes in enclosures must be protected by bushings or fittings designed for the purpose (1926.405(g)(2)(v) – fittings designed to fasten cables to metal boxes are not acceptable); and no grounded conductor shall be attached to any terminal or lead so as to reverse designated polarity (1926.404(a)(2)).