Raceway Reduction

[aviatorbill]

OK guys here it is....

We may be wrong but everyone here swears that the NEC states that you cannot reduce the size of a Raceway in the middle of a run without using a conduit body, box, etc. however we can't find it?! Are we wrong and if not where is it?

 

[iwire]

Re: Raceway Reduction

This has come up before and there is nothing in the NEC that would specifically prevent this.

I have had to do this on a PVC run under ground, I needed a 3/4" run but ran out of 3/4" and switched to 1" PVC to finish.

I did it by putting a 1" PVC coupling onto the 3/4" bell end.

So in my case an inspector might say 352.6 PVC fittings to be listed.

They where listed fittings but are they listed to do what I did?

 

[iwire]

Re: Raceway Reduction

By the way I do not mean to say I think this is a great idea and thank you for posting.

 

[tom baker]

Re: Raceway Reduction

As long as the small section of the raceway meets raceway fill requirements increasing the size is OK. But the reducing bushings are hard to push a fish tape through, and the increased size at an end may mislead someone as to the actual size of the raceway.

 

[frenchelectrican]

Re: Raceway Reduction

i agree with you tom but here is the catch about using reducing conducts on the larger conducts where it will be termated i marked down the small size so that way it is given a quick warning like what bob say useing 3/4 conduct but ran out then have to use 1 inch conduct to finish off but what i will genrally do is marked near the box or termation area so that be well aware about smaller conduct at some point so advoid code volitaions with sizing conducts

merci marc