Wire Nuts with Stainless Coils Required?

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Are there circumstances where stainless coils in wire nuts are required by code in the USA?

I can see the definite advantage in damp environments. Are they required there or elsewhere?

FWIW, it doesn't look like the markings on the end indicate damp or not... perhaps that's implied in some other spec?
 
Never seen SS wire nuts. The idea is to keep moisture out to begin with. There are damp location wire nuts that have a grease in them that are used in those locations such as lawn sprinkler valve boxes. Otherwise, there are encapsulation kits that you put the splice in, and it gets filled with an epoxy or other compound to make it waterproof such as direct burial.

Regular wire nuts are for use in dry locations only.

-Hal
 
ptonsparky said:
And the proof...somewhere in his service truck was evidence of spilled Scotckote after their 1st use.
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Yep. Been there and done that. Can got stuck to the shelf.
I gave up on scotchkote and started using drycon wire nuts. Easier to use and can reuse
 
I'm pretty sure that stainless steel and copper (and aluminum) are dissimilar enough metals and galvanic corrosion is likely to take place.
 
hbiss said:
Never seen SS wire nuts. The idea is to keep moisture out to begin with. There are damp location wire nuts that have a grease in them that are used in those locations such as lawn sprinkler valve boxes. Otherwise, there are encapsulation kits that you put the splice in, and it gets filled with an epoxy or other compound to make it waterproof such as direct burial.

Regular wire nuts are for use in dry locations only.

-Hal
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Not a stainless-steel wire nut. The spring or coil INSIDE the wire nut.
 
hbiss said:
Ummm, I assumed the OP was talking about the spring (I hope). He made that clear in his title.

-Hal
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Sorry, I took your reply to mean you thought he meant the shell of the wire nut was stainless steel. My bad.
 
I worked at a large slaughter house then a halve million square foot candy plant that both had night high pressure wash downs. Like to have a dollar every time I opened up a motor pecker head, micro switch , NEMA 4 boxes that were halve filled with water. We only used common Ideal company wire nuts with top of nut facing up and several wraps of quality tape down one inch on the insulation. We always took the extra step to pre twist wires with heavy side cutters then again on the wire nuts. Came back 5 to 10 years later and inside of most wire nuts had none to very little rust and always provided a reliable connection even on vibrating screens, compressors, hammer mills & centrifuges.
 
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