subelect

So, today the boss and I were planning on installing a long stretch (140') of IMC horizontal across a cement wall. He mentioned that because the length is over 100', a pull box is required by the Code.
Now, I realize that you can't exceed 360 degrees between boxes and it probably is a smart idea to install a pull box on this job, but where in the Code does it require a pull box based solely on length of the run?
Thanks.

JohnJ0906

No. Ask him to show you where it is - he won't be able to.

That said, on a long pull, you should do a pulling calculation - you might have to apply too much pressure to install the conductors, and damage the insulation.

Also, a pull box can make it easier. It just isn't required.

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John from Baltimore
"One day at a Time"
All responses based on the '08 NEC
It's not my fault, it's not my problem, I'm not your solution.

480sparky

No. You're limited only by the length of wire you can pull in.

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nap

don't know of one myself and have never been tagged for 2 or 300 foot runs.

I did work for one guy once that did this simply because he didn;t have a fish tape long enough to run a 200 foot pull and apparently had no faith in his vacuum to suck a line.

140' ain't nothin'

Losrod

I don't think there is anything in the code book that say's you have to have a pull box at that length. I would always use as a rule of thumb a 200' long run i would set a j-box, because if i had to run a fish tape to pull wire. The fish tape is normally 200' long. But i guess it all depends on the size of conduit. Or the size of conduit that you are working on. I don't think you would want to put j-box for a feeders.

JohnJ0906

A bucket of jet-line is 6000', I think.

Don't know if I have a vacuum that would suck that much distance though. Or a rope that long. Or if the wire could take it.....

Done 400' once though.

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John from Baltimore
"One day at a Time"
All responses based on the '08 NEC
It's not my fault, it's not my problem, I'm not your solution.

Speedy Petey

This is yet another an old electricians tale. I had someone tell me the same thing many years ago.

I love it when guys tell you stuff like this, yet they can never back it up. What kills me is that they actually say "It's in the code book". You'd think they'd try to look it up at least once themselves.

randomkiller

There was this polish girl I met in Wisconsin, oops wrong forum

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nap

Oshkosh by chance?

randomkiller

Nope, closer to Green Bay

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nap

apparently a different girl

subelect

Thanks for the info, even from you Jarheads.
No, I have no problem following the boss's orders, I just like to know exactly what the Code says and requires.
It is very easy to get used to the mechanics of doing the work (bending EMT, punching the knockouts, is LTFMC cheaper than a short pc. of IMC w/ a coupler...etc) and to forget the Code reasons/rules behind what we do everyday.
Thank you again.

HighWirey

No NEC stipulations on the maximum length of a pull.
We used to do a bit of telcom work manhole to manhole. Must be some sort of telcom standard, however our spacing was about 400 lf, 4" ducts.
Now with the advent of interstate fiber optic connections, I see quarter to half mile 2" PVC connections, PB to PB.

RK,

Following your lead, I used to work with a JW who could pull almost a 29" vacuum on a piece of 1/2" EMT, especially when talking to the boss . . . (but then, haven't we all worked with this guy?)

Work'in For That Free Tee . . .

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jrclen

She moved over near Westfield after her divorce. Nice girl.

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John

randomkiller

Not much of a looker but boy can she vacuum.

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A Veteran - whether active duty, retired, guard or reserve - is someone who, at one point in his life, wrote a blank check made payable to "The United States of America," for an amount of "up to and including my life."

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480sparky

I've gone back through all my old Code books (back to '37) and cannot find even an old rule that has been taken out. This is one of those electricians mysteries (no splicing in panels, why '3-way' switches, etc) that defies explanation, let alone an origin.

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