THREAD TAPERS
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Posted by: EdKnox ®

05/11/2006, 18:06:04
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I teach the 1st and 2nd year curricula at the Denver Joint Electrical Apprenticeship Training Program. My students would like to know definitively whether or not differences exist between the appropriate thread pitches for threaded conduit and threaded plumbing pipes. For instance, we know that the National Electrical Code requires ¾" taper per foot for rigid conduit. We are told by some experts that plumbing installations using threaded pipe also require ¾" taper per foot. That would certainly indicate that the same dies could be used for all same-size piping needs on any given job, unless there are differences in the pitch. Is it appropriate and correct to thread both with the SAME SET OF DIES??






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Re: THREAD TAPERS
Re: THREAD TAPERS -- EdKnox Post Reply Top of thread Forum
Posted by: devitg ®
Bart
05/14/2006, 22:44:17
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As far as I know , when NEC talk about a 3/4" taper per foot thread , it talk about the same pipe used by plumbers normally the NTPT standard .
NTPT stand for
National
Thread
Pipe
Taper
It is used mainly at Explosión proof system.









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Re: Re: THREAD TAPERS
Re: Re: THREAD TAPERS -- devitg Post Reply Top of thread Forum
Posted by: luvz2flyalot ®

06/04/2006, 18:50:39
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Machinery's Handbook is an excellent reference for thread specs.

R. McCullough








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