conduit

[enote]

what is max. lenght of conduit run before u have to put j-box in

 

[iwire]

I would imagine about 24,859 miles because at that point you will likely have reached 360 degrees of bend.

 

[augie47]

as far as the NEC is concerned, unlimited. As far as your pull rope, string, etc will allow and as long as your pulling tension won't damage the conductors.

stepped on Bob.,,, his answer is better

 

[Barndog]

as far as the NEC is concerned, unlimited. As far as your pull rope, string, etc will allow and as long as your pulling tension won't damage the conductors.

stepped on Bob.,,, his answer is better

Just remember if you only have a 200 foot snake i wouldnt go over 180 because you might end up short if you hang 200 feet of pipe after its bent. it happend to me once. and had to break couplings apart. Not fun

 

[Jim W in Tampa]

Perfect answer Bob.
I have been on a few over 500 feet. They can go easy or hard depending on pipe fill,size,lube, number of bends and most of all how head was made and who is feeding it..
Just keep in mind you got to be able to pull it in.

 

[mkgrady]

I would imagine about 24,859 miles because at that point you will likely have reached 360 degrees of bend.

Don'r forget to include box offsets when counting those bends!

 

[xformer]

Don'r forget to include box offsets when counting those bends!

good point

 

[LarryFine]

E, welcome to the forum!

what is max. lenght of conduit run before u have to put j-box in

It used to be 100 feet back when we had 110/220 volts and the high leg was 190 volts.

Now that we have 120/240 volts and the high leg is 208 volts, there is no defined limit.

 

[480sparky]

................
It used to be 100 feet back when we had 110/220 volts and the high leg was 190 volts. ............

Was that an NEC requirement?

 

[LarryFine]

Was that an NEC requirement?

I don't know, but the guys with the antique NEC's should be able to tell us.

I can say that I was taught those back when I was a helper: there was a 100' limit between pull-points, and the high leg was called 190v.

Also, the neutral was referred to as the identified conductor, by white color and/or other methods, such as ribs on or threads in lamp cord.

 

[Jim W in Tampa]

System was the same 110/220 was simply increased 10% so now its 208

 

[jap]

I would imagine about 24,859 miles because at that point you will likely have reached 360 degrees of bend.

That's funny right there and also good thinking.

 

[Jim W in Tampa]

I would imagine about 24,859 miles because at that point you will likely have reached 360 degrees of bend.

Must make for a hell of a voltage drop.

 

[jusme123]

I would imagine about 24,859 miles because at that point you will likely have reached 360 degrees of bend.

Perfect answer Bob.
I have been on a few over 500 feet. They can go easy or hard depending on pipe fill,size,lube, number of bends and most of all how head was made and who is feeding it..
Just keep in mind you got to be able to pull it in.

Vertical risers need conductor supports, so you may be limited to 35 feet before a jb is required

 

[roger]

Vertical risers need conductor supports, so you may be limited to 35 feet before a jb is required

That would depend on the size and material of the conductors.

Roger

 

[480sparky]

Vertical risers need conductor supports, so you may be limited to 35 feet before a jb is required

But not for splices or junctions.... just support of the conductors.

 

[jusme123]

But not for splices or junctions.... just support of the conductors.

I could run a 400' vertical riser with 500 mcm, 4" rigid conduit, without a junction box, and be code compliant (it depends what material you use, job specs aside)

 

[220/221]

As long as the conduit is about 12" shorter than the wire, you can run as much as you want.

 

[captain kilowatt]

how long is your fish tape? realy someone told me 300 ft. years ago

 

[mbeatty]

I would imagine about 24,859 miles because at that point you will likely have reached 360 degrees of bend.

Great one iwire! :grin: