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#55811 - 09/06/05 11:58 PM The sweet sound of insulation scraping off as you pull in wires  
Peter  Offline
Member
Joined: Jun 2004
Posts: 92
San Diego
Folks,
I ran into a situation today which you may symphasize with. I was pulling wires through a L E Mason, Red Dot condulet and there is a sharp cornerinside the LB and it was scraping insulation from my wires. Two white wires ended up with bare copper showing. I don't know why tthe company buys this junk and why Thomas & Betts produces it. [They also have the obsolete straight slotted screws.]
Has anyone else experienced this problem?
~Peter


Work Gear for Electricians and the Trades

#55812 - 09/07/05 12:17 AM Re: The sweet sound of insulation scraping off as you pull in wires  
Tiger  Offline
Member
Joined: May 2005
Posts: 706
Crystal Lake, IL USA
I'm sure your company is very proud of your workmanship and helping them see a profit.

Dave


#55813 - 09/07/05 12:23 AM Re: The sweet sound of insulation scraping off as you pull in wires  
SolarPowered  Offline
Member
Joined: Jul 2004
Posts: 625
Palo Alto, CA, USA
Does your buyer in fact know that it's junk? Generally, all he knows is what the catalog says about it, and what the price quote is. I've never seen a catalog page that says, "This stuff is junk." If nobody tells him that it's no good, he'll just keep buying it, assuming that it's OK.


#55814 - 09/07/05 08:52 PM Re: The sweet sound of insulation scraping off as you pull in wires  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,223
SI,New Zealand
S/Powered,
Quote
I've never seen a catalog page that says, "This stuff is junk."

Can't say I have either, but I'm all for honesty when it comes to product descriptions.
[Linked Image]


#55815 - 09/07/05 10:26 PM Re: The sweet sound of insulation scraping off as you pull in wires  
falcondfb  Offline
Member
Joined: Sep 2002
Posts: 37
Jersey, USA
yep, 300 foot pull of twin sets 3/0 copper, 8 wires total, pulled both directions from center point by hand through multiple bend, lb, trough, anything on the shelf. last 40' skinned 2 wires like mad. 4 rolls of 33+ later and some white tape to make them neutrals and we were done. NOT my idea


#55816 - 09/08/05 03:45 AM Re: The sweet sound of insulation scraping off as you pull in wires  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,223
SI,New Zealand
Regardless of the length of pull,
I'd recommend the prolific use of Lube.
Cable lube is a wholly under-stated thing, sure it will not help with sharp edges, but it will help with a long pull.
As an Electrician, I check all of the surfaces, (mainly bends) that I will be pulling through, for smoothness.
Anything that has a sharp or even coarse edge, gets the file treatment.
Having cables or wires blow out within a conduit, because of poor installation here is looked upon as very bad practice.
I expect it is the same in the US?.


#55817 - 09/08/05 04:55 AM Re: The sweet sound of insulation scraping off as you pull in wires  
tkb  Offline
Member
Joined: Dec 2004
Posts: 94
Massachusetts
What size conduit?
What was the max size and nuumber of conductors marked on the LB?


#55818 - 09/08/05 05:57 AM Re: The sweet sound of insulation scraping off as you pull in wires  
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Quote
What was the max size and number of conductors marked on the LB?


That is a real consideration.

A typical LB can not hold the same number of conductors as the raceway it is connect to.

A typical problem I run into is 225 amp feeders. We can run four 4/0 in 2" EMT but the 2" EMT LB is labeled as three - 4/0s max.

By the way TKB, how is BU I hear you have been a great help there and other places. [Linked Image]

Bob


Bob Badger
Construction & Maintenance Electrician
Massachusetts

#55819 - 09/08/05 05:26 PM Re: The sweet sound of insulation scraping off as you pull in wires  
tkb  Offline
Member
Joined: Dec 2004
Posts: 94
Massachusetts
Bob,
I think BU is finished, but the S&S nights were tough.
I like being on my own, but sometimes I miss the big machine.
Like they say, They always come back. I'mmm baaack. [Linked Image]
Hope to help more in the future.

[This message has been edited by tkb (edited 09-08-2005).]


#55820 - 09/08/05 05:33 PM Re: The sweet sound of insulation scraping off as you pull in wires  
tkb  Offline
Member
Joined: Dec 2004
Posts: 94
Massachusetts
Quote
A typical LB can not hold the same number of conductors as the raceway it is connect to.


Wouldn't it be nice if the manufactures and the NEC would get on the same page with this?
I think that all LB's should allow the same fill as the conduits that connect to them. If this means redesign of the LB's then so be it.


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