Change from 1" to 1 1/4" conduit in middle of run

[Dennis Alwon]

My point was assuming metal conduit you could not insert a 1" conduit into a 1 1/4" conduit without a fitting if you are using the raceway as a complete system for line voltage wiring. Obviously if we are using this conduit as a sleeve that is something else.

I also have used a bell end of pvc and inserted it into a larger conduit. It works fine but the op wasn't clear on what was being done. IMO

 

[iwire]

But, isn't the designed inside diameter maintained?

Not the ones I am thinking of.

http://www.aifittings.com/whnew108.htm

 

[iwire]

My point was assuming metal conduit you could not insert a 1" conduit into a 1 1/4" conduit without a fitting if you are using the raceway as a complete system for line voltage wiring.

Why is that obvious?

Other than 110.3(B) do you have something in mind?

 

[Dennis Alwon]

Why is that obvious?

Other than 110.3(B) do you have something in mind?

What are we playing the circle game today. I already stated what I had in mind art. 300.10

 

[LarryFine]

Not the ones I am thinking of.

http://www.aifittings.com/whnew108.htm

In those, the 2" ID is maintained by the inner pipe and the locknut end. Granted, when extended, there is a portion with 2.5" ID, but it's never smaller than 2".

 

[iwire]

In those, the 2" ID is maintained by the inner pipe and the locknut end. Granted, when extended, there is a portion with 2.5" ID, but it's never smaller than 2".

Yes no kidding. :grin:

And in the OPs they changed from 1" to 1.25" that is never smaller than 1"

 

[iwire]

What are we playing the circle game today. I already stated what I had in mind art. 300.10

Assuming metal conduit I will agree with you.

But really, that does not address the OPs concern now does it? The OP seems to be concerned with the size change.

 

[plumb bob]

Personally I have changed from 3/4" to 1" under a slab when we ran out of 3/4" The bell end of 3/4" fits perfectly into the bell end of 1" and glues up tight.

it's good to see there's a little hack in all of us

 

[iwire]

it's good to see there's a little hack in all of us

LOL. :grin:

It was before 'iwire'

 

[LarryFine]

Yes no kidding. :grin:

Captain Obvious strikes again!

And in the OPs they changed from 1" to 1.25" that is never smaller than 1"

That's fine if you know ahead of time, but, there's still that pesky edge to get over.

 

[LarryFine]

It was before 'iwire'

uwire? :grin:

 

[cowboyjwc]

uwire? :grin:

Probably "rewire".:grin: