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#63060 - 03/05/06 08:08 PM how to keep rope from cutting thru pvc 90's  
lite bulb  Offline
Member
Joined: Feb 2006
Posts: 78
wilm,de.
on long runs of say 4/0 with alot of tension how do you keep the rope from burning thru the pvc 90's, one 90 the rope burn't all the way thru, had loads of lube on the wire. this can't be good to have the pipe split open. the run is 400' with 3- 90's and 3" pvc. is this common.


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#63061 - 03/05/06 08:18 PM Re: how to keep rope from cutting thru pvc 90's  
venture  Offline
Member
Joined: Jan 2006
Posts: 38
San Diego Ca USA
use a braided pull rope. Yellow nylon rope cuts the PVC as you noted. A pull rope is braided polyester (I think) that is softer and will go thru 90's smoothly. Rod http://www.greenlee.textron.com/cat_docs/Fish_CablePull_MaterialHandle.pdf
page 34

[This message has been edited by venture (edited 03-05-2006).]


#63062 - 03/05/06 08:29 PM Re: how to keep rope from cutting thru pvc 90's  
georgestolz  Offline
Member
Joined: Jun 2005
Posts: 91
Fort Collins, CO, US
Use EMT 90°s. [Linked Image]


-George

#63063 - 03/05/06 08:44 PM Re: how to keep rope from cutting thru pvc 90's  
Surfinsparky  Offline
Member
Joined: Jul 2005
Posts: 73
merritt island fl usa
Most jobs I have done ridgid 90 was the spec with the bitchmastic coating.How about lots of soap pull a snot rag thru the conduit or blow a bunch of soap in it.


#63064 - 03/05/06 08:49 PM Re: how to keep rope from cutting thru pvc 90's  
lite bulb  Offline
Member
Joined: Feb 2006
Posts: 78
wilm,de.
the rope is braided like a clothes line rope material but very high tension maybe the rope is to thin it's maybe 5/8. all but one 90 is underground .


#63065 - 03/05/06 09:11 PM Re: how to keep rope from cutting thru pvc 90's  
bot540  Offline
Member
Joined: Sep 2004
Posts: 174
Vernon Hills, IL
Those braided polyester ropes aren't cheap. Especially in lengths 400' long(if they make them that long). If you used rigid 90's they would have to be 18" or deeper. Is there a way to bond a rigid 90 in a pvc run above ground?


Jesus may have been a capenter,but God was an electrician.Genesis1:3

#63066 - 03/05/06 10:11 PM Re: how to keep rope from cutting thru pvc 90's  
Tesla  Offline
Member
Joined: Jun 2004
Posts: 1,273
Sacramento, CA
Greenlee does sell such bull ropes.

If the feeder pull is going to be a challenge: slurry the nineties; use sweeps in the horizontal turns.

Truly get the pipe clean of mud, debris....
Pull in a snot rag.

Push the wire in as much as is practical: each pound of force here triggers a multiple of force reduction at the tugger.

Use a nice exit sheave: pull straight up over a pulley.

When allowed, aluminum conductors will pull easier and cost less than copper.


Tesla

#63067 - 03/06/06 08:17 AM Re: how to keep rope from cutting thru pvc 90's  
XtheEdgeX  Offline
Member
Joined: Apr 2005
Posts: 116
Florida
I agree with the rigid 90*'s. I won't use pvc 90*'s underground. Of course that won't help if you've already installed it. If so, you'll have to use a different type of pull rope as suggested.


#63068 - 03/06/06 04:08 PM Re: how to keep rope from cutting thru pvc 90's  
Surfinsparky  Offline
Member
Joined: Jul 2005
Posts: 73
merritt island fl usa
You bond your metal 90 when you take metal all the way up thru the pour and put a meg bushing on it.


#63069 - 03/06/06 07:39 PM Re: how to keep rope from cutting thru pvc 90's  
resqcapt19  Offline
Member
Joined: Nov 2000
Posts: 2,148
IL
All round ropes will cut through the PVC. The braided rope is an improvement over the twisted rope, but it will still cut under high tension and long pulls. Also the use of the twisted rope with tuggers is a safety issue. It has too much stretch and can cause injury or damage. The braided rope is a more "static" rope and does not have as much stretch.

Some use "mule" tape to pull in PVC. It is flat and reduces the cut through.
Don


Don(resqcapt19)

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