Graybeard Outdoors banner

1 - 9 of 9 Posts

·
Registered
Joined
·
897 Posts
Discussion Starter #1
Tie a cotton ball on some builders' string. Stick that end in the conduit and put a vacume cleaner on the other end.
 

·
Registered
Joined
·
398 Posts
Re: Fishing Wires Through Conduit

A coworker and I were getting ready to pull some fiber optic line through about 515' of "fresh" conduit. Tied a piece of plastic, a sandwich bag I believe, to a length of regular plastic pull string and sucked it through in about 25-30 seconds, maybe less with the aid of a fairly large shop vac. I had never seen it done before and I was amazed at the speed the string peeled out of the box and how fast I was told over the radio to turn the vacuum off because the plastic and the start of the string had been "swallowed" by the vacuum cleaner on the far end. We didn't install any pull boxes for the string to go through because we had pretty much a straight shot from start to finish.

I was impressed.
 

·
Registered
Joined
·
64 Posts
I'm a retired electrician, and have used that method for a long time (since 1962). The thing we used was called a "rat", made out of plastic foam, with a stiff wire through it. If there is a burr inside the conduit, a cotton ball would either get stuck or shed some material, losing vacuum. I have had to take a lot of conduit down to clear stoppages because of foreign material in the way.
 

·
Registered
Joined
·
4,450 Posts
Thanks for this great information guys. I am currently working on a project, and couldn't figure out how to do this.

Mannyrock
 

·
Registered
Joined
·
3,322 Posts
mannyrock said:
Thanks for this great information guys. I am currently working on a project, and couldn't figure out how to do this.

Mannyrock
How about a fish tape? I've used the air method with conduit up to 200' long and 4" in diameter. Used a baggie and a compressor.
 

·
Registered
Joined
·
28,628 Posts
Around here they use a thing made to fit each size pipe that has a thin string in it that come somewhat like what a bow hunter attaches to his arrows. Or they use the foam plug with an eye bolt in it with some poly twine.
 
1 - 9 of 9 Posts
Top