Repairing NEMA 4x Penetrations
Repairing NEMA 4x Penetrations
(OP)
I'm trying to find the best way to patch a hole in a NEMA 4x panel box. In order to mount a temp stat sensor onto the box we were required to run the wires into the box. The Stat sensor is an open device and a gasket behind the stat would not properly shield the hole from the outside environment. What would be the best way to seal the hole to maintain the NEMA 4x rating?





RE: Repairing NEMA 4x Penetrations
As an example, looks like this:
Interesting side note, spell check seems to think that "gromment" is not a word, yet I have seen it spelled that way my entire career, although I guess I have not had to type that word since the advent of spell checkers...
"If I had eight hours to chop down a tree, I'd spend six sharpening my axe." -- Abraham Lincoln
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies
RE: Repairing NEMA 4x Penetrations
Dan - Owner

http://www.Hi-TecDesigns.com
RE: Repairing NEMA 4x Penetrations
"If I had eight hours to chop down a tree, I'd spend six sharpening my axe." -- Abraham Lincoln
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies
RE: Repairing NEMA 4x Penetrations
Cable must be connected through a liquid tight conduit fitting using the appropriate conduit type to maintain the NEMA 4X rating.
That means in order to maintain NEMA 4X rating one has to connect the cable by means of a flexible liquid tight conduit or galvanized rigid steel conduit c/w suitable fitting.
See:
http://www.o-zgedney.com
There are more other suppliers as Thomas&Betts, Crouse Hinds and others.
RE: Repairing NEMA 4x Penetrations
What jraef showed you are "cable glands". You could specify for explosion proof cable/ deluge proof glands to solve your NEMA 4X-related penetrations.
My 2¢
RE: Repairing NEMA 4x Penetrations
There are lots of cable glands that are NEMA 4X. NEMA 4 isn't that hard.
First example:
http://www.mcmelectronics.com/product/28-8650
Keith Cress
kcress - http://www.flaminsystems.com
RE: Repairing NEMA 4x Penetrations
"The Stat sensor is an open device and a gasket behind the stat would not properly shield the hole from the outside environment"
I am not quite sure of your question, but are you trying to "fix/patch/repair" a NEMA 4X rated panel box?
RE: Repairing NEMA 4x Penetrations