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trekketoo 04-20-2012 02:12 PM

Wire in conduit
 
Just curious which is the prefered way to get the electrical cable through the conduit, and why?

I see some pull a rope through as they glue the conduit and pull the wire when done.

Others feed the cable through each individual piece of conduit as they go along.

Thanks in advance for your answers.

joed 04-20-2012 02:16 PM

Feeding the wire as you go is against code. The glue could damage the wires.
Feeding the rope as you go or after is your choice. Most electricians will feed the rope after.

itsnotrequired 04-20-2012 02:17 PM

Quote:

Originally Posted by trekketoo (Post 903158)
Just curious which is the prefered way to get the electrical cable through the conduit, and why?

I see some pull a rope through as they glue the conduit and pull the wire when done.

Others feed the cable through each individual piece of conduit as they go along.

Thanks in advance for your answers.

the proper method is to pull it through but for short runs, pushing it is okay as well. all depends on the conductor size, conduit diameter, where the bends are (it is often easier to pull from A to B than B to A), etc.

trekketoo 04-20-2012 02:29 PM

A cowork said the rural electric company instructed them to feed the wire as they go. That surprised me.

itsnotrequired 04-20-2012 02:34 PM

Quote:

Originally Posted by trekketoo (Post 903172)
A cowork said the rural electric company instructed them to feed the wire as they go. That surprised me.

electric utilities aren't bound by the nec.

darren 04-20-2012 04:45 PM

Quote:

Originally Posted by trekketoo (Post 903158)
Just curious which is the prefered way to get the electrical cable through the conduit, and why?

Get the apprentice to do it.



I usually use a metal fish tape.

goosebarry 04-20-2012 05:17 PM

Quote:

Originally Posted by darren (Post 903248)
Get the apprentice to do it.



I usually use a metal fish tape.

Tie a string to a mouse. Put mouse in one end and food at the other. use string to pull cable.

I find pushing cable is usually harder than pulling.

Jeeps 04-20-2012 07:17 PM

Quote:

Originally Posted by trekketoo (Post 903158)
Just curious which is the prefered way to get the electrical cable through the conduit, and why?

I see some pull a rope through as they glue the conduit and pull the wire when done.

Others feed the cable through each individual piece of conduit as they go along.

Thanks in advance for your answers.


Usually when you see them put the conductors in as they lay the pipe will mean the run of pipe is too long to put a fish tape in, or blow a jetline in to later. Not a good wiring practice really but it works, especially for POCO long lateral services where they cannot put pull boxes in. .

brgmgb 04-20-2012 07:19 PM

A few methods I have used with success are:
  1. Metal fish tape. Push the fish tape through the conduit. Assuming you need to pull three wires - black, white, and green - wrap and tape one wire (e.g., green) around the fish tape. Then an inch or two down, tape another wire (e.g., white). Then another inch or two down, tape the last wire. It works best to have one person pull while another squeezes the wires together where they enter the conduit.
  2. Twine. I like using masonry twine because it seems stronger. You could pull it through while putting the conduit together. Another method that works well is to cut a plastic bag into a square and using some twine, create a little parachute. At the other end of the run, use your shop vac to pull the twine through the conduit. You can either use the twine to pull the fish tape or the wires through the conduit.

rrolleston 04-21-2012 07:45 AM

Quote:

Originally Posted by trekketoo (Post 903158)
Just curious which is the prefered way to get the electrical cable through the conduit, and why?

I see some pull a rope through as they glue the conduit and pull the wire when done.

Others feed the cable through each individual piece of conduit as they go along.

Thanks in advance for your answers.

If this is for your 200 amp service to the future cabin and temp rv power. How far are you going and what size conductors and conduit are you using.

The pull rope method is much easier. Than trying to get that wire through as you go if you use wire lube and it dries before you finish your run it will get harder as you go. And from what I hear getting glue on the wires is not a good idea. I have been meaning to put some on a URD cable and post what happens.

darren 04-21-2012 08:00 AM

Quote:

Originally Posted by brgmgb (Post 903361)
Assuming you need to pull three wires - black, white, and green - wrap and tape one wire (e.g., green) around the fish tape. Then an inch or two down, tape another wire (e.g., white). Then another inch or two down, tape the last wire.

This works great for short distances but if it is a long pull I would strip the 3 wires and twist them together. Leave one long and make a hook with it and put it on the fish tape and tape it up. Doing it this way there is very little chance of the wires coming off, in the first method there is chance when your pulling that you will start only pulling the one wire that is attached to the fish tape.

J. V. 04-21-2012 12:37 PM

Install the conduit system completely first, then pull in the wires. This is how its done. This is how professionals do it. I have never seen one decent/real electrician do it in sections or any other way. Besides the NEC says its the right way.

ddawg16 04-22-2012 03:21 AM

As noted above....wire goes in 'after' the conduit is done....

For short runs...you can usually push the wire through....but they need to be pretty straight....if you have more than 1 90....forget it...your going to have to pull.

2 ways to pull wire through...

1. Fish tape.

2. Vacuum.....take a wad of cloth...tie a string around it..drop it in the conduit...use a shop vac at the other end...suck the wad through...use string to pull wire through.

Once you understand that any short cuts taken usually end up not working....you resign yourself to just doing it right in the first place....

ddawg16 04-22-2012 03:26 AM

double post

nicko 04-24-2012 08:30 AM

I'm in the process of laying 140' of 2" conduit. Working by myself, do you see any issue with pulling 4 wires one at a time? Thinking that pulling all 4 at once could be a chore for that distance.


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