Long underground pipe pulls

[zcanyonboltz]

Electricamagician

 

[Carultch]

I doubt there were electrical conduits before string was invented.

Wow pretty interesting stuff here! I just meant how'd they get the string through the conduit.

I would guess that you would loosely lay out the conduits, and send the string through every 10 feet of conduit, stick-by-stick. Maybe by tying a knot at one end, and dropping it through. Then you'd drop the conduits in the trench with the string inside, apply the glue, and put them together.

 

[macmikeman]

You revived an old thread by posting a new topic within it. You really should start a new thread with your new topic.

Too late now, cause macmikeman is going to start talking about those awesome fun CO2 canisters with string attached , we used to shoot thru the conduits that would come rocketing out the other end and bounce around the room a few times before they finally ran out of fuel............ An apprentice reward for being a good worker was to let him fire the gun off where I worked.......


I bet that if we revived them, there would be increased interest in our trade by the young fella's

 

[Johnnybob]

They must have been magic.

Still is to some people lol

 

[Cow]

I would guess that you would loosely lay out the conduits, and send the string through every 10 feet of conduit, stick-by-stick. Maybe by tying a knot at one end, and dropping it through. Then you'd drop the conduits in the trench with the string inside, apply the glue, and put them together.

I can tell you from experience that installing string in conduit that is freshly glued, especially a long run with a lot of glue joints will ultimately result in a string that ends up glued in at several joints. Of course, this isn't discovered until you come back later when the glue is good and dried and you try to get the pull string out to get the rope/cable in. In our instance, it was a 1000' run. That was a lot of glue joints, it wasn't pretty.

Now I give it some time before I install string in long runs of conduit.

 

[GoldDigger]

Just put wire lube on the string if you can't wait?

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[Cow]

Just put wire lube on the string if you can't wait?

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I don't know anyone who has the patience or man hours to lube string. If you don't coat every inch, then it's a moot point, and nobody has time to coat 12,000 inches on a 1000' run. Not too mention, that string is going to drag so hard with lube on it, the vacuum will most likely never get it to the end.

If I needed a wire measurement so quickly that I couldn't wait, I'd simply run a measuring wheel on the ground beside the ditch, add some fudge factor and order wire.

 

[ptonsparky]

I can tell you from experience that installing string in conduit that is freshly glued, especially a long run with a lot of glue joints will ultimately result in a string that ends up glued in at several joints. Of course, this isn't discovered until you come back later when the glue is good and dried and you try to get the pull string out to get the rope/cable in. In our instance, it was a 1000' run. That was a lot of glue joints, it wasn't pretty.

Now I give it some time before I install string in long runs of conduit.

It only took me one of those.

 

[Cow]

It only took me one of those.

Same here.

 

[growler]

We pulled in some underground today about a 250 yard underground pull. I was wondering how they used to get the wire through the pipe before shop vacs and pull string were invented? Push a fish tape that far? Also what'd they do before tuggers?

I would guess that you would loosely lay out the conduits, and send the string through every 10 feet of conduit, stick-by-stick. Maybe by tying a knot at one end, and dropping it through. Then you'd drop the conduits in the trench with the string inside, apply the glue, and put them together.

Way back in the good old days you would not have been dealing with PVC conduit for underground it would have been rigid. PVC is post world war twice.

In the early days conduit was ran by plumbers and I'm pretty sure they would not have helped out the sparkies by pulling in a string.

It's just a guess but since compressed air and string were around before conduit (electrical type) I doubt it took very long for them to figure out how to get a rope in the conduit.

Before tuggers there was a contest called a tug-of-wire and I wonder how that got started.

 

[Rampage_Rick]

In the early days conduit was ran by plumbers and I'm pretty sure they would not have helped out the sparkies by pulling in a string.

Waaaayy back they would have needed carpenters, since the conduit was made from wood:


http://searcharchives.vancouver.ca/b-c-telephone-work-on-georgia-street

Now, where'd I leave my ferret?