Chase Nipple

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jbolen

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I have metal box with 3/4 chase nipple between box and 3/4 lb. Does it require a lock nut also.....section please
 
As long as it makes up tight I don't think it is an issue. Nec uses the term conduit fitting not chase nipple. The white book appears to allow it as long as it is made up tight.
 
A box with a threaded hub with a chase nipple going into a threaded lb does not require lock nuts. Since the NEC is permissive, there would have to be a code section requiring lock nuts with threaded connections, and there isn't.

A chase nipple between panels or non threaded boxes requires lock nuts, although I do not have a code section at the ready for it.
 
JFletcher said:
A box with a threaded hub with a chase nipple going into a threaded lb does not require lock nuts. Since the NEC is permissive, there would have to be a code section requiring lock nuts with threaded connections, and there isn't.

A chase nipple between panels or non threaded boxes requires lock nuts, although I do not have a code section at the ready for it.
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I agree but I am pretty sure he will have threads on the 3/4" LB. :D
 
Chase nipple have straight threads and are not permitted in threaded LB's. Yes I know done every day. The correct installation is a close nipple with two locknuts.
 
JFletcher said:
A box with a threaded hub with a chase nipple going into a threaded lb does not require lock nuts. Since the NEC is permissive, there would have to be a code section requiring lock nuts with threaded connections, and there isn't.

A chase nipple between panels or non threaded boxes requires lock nuts, although I do not have a code section at the ready for it.
Click to expand...

How do you use a chase with a box hub and lb? Byclose yes, threads on both ends, chase has built in locknutish
 
I don't think that the OP mentioned a hub. I'm thinking that he has a 3/4" KO in a box with a chase nipple going into the treads on an LB conduit body.
 
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