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#23907 - 03/30/03 01:28 PM THW wire  
CTwireman  Offline
Joined: Feb 2002
Posts: 840
Connecticut, USA
I have 2 old spools of THW wire. Is is permissible to use this anymore?

I am thinking about using it feed a tool shed through 3/4 pvc.

If not, I will be taking a run to the scrap yard.



Work Gear for Electricians and the Trades

#23908 - 03/30/03 01:35 PM Re: THW wire  
iwire  Offline
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
It is listed in 310.13 as OK for dry and wet locations, there is no reason not to use it.

Remember if you run out more than 1 circuit you will need a ground rod out there.

Bob Badger
Construction & Maintenance Electrician

#23909 - 03/30/03 01:41 PM Re: THW wire  
CTwireman  Offline
Joined: Feb 2002
Posts: 840
Connecticut, USA
Thanks Bob. It's for a single circuit, so I don't have to worry about the ground rod.


#23910 - 03/30/03 05:41 PM Re: THW wire  
Ron  Offline
Joined: Mar 2002
Posts: 582
White Plains, NY
THW is a great conductor as its insulation is more durable (thicker) during a pull through conduit. It is rated for wet environment, as underground installation must be considered.

[This message has been edited by Ron (edited 03-30-2003).]


#23911 - 03/30/03 05:43 PM Re: THW wire  
NJwirenut  Offline
Joined: Sep 2001
Posts: 806
Bergen County, NJ
Doesn't "THW" signify THermoplastic, Wet location?

#23912 - 03/30/03 08:13 PM Re: THW wire  
Bjarney  Offline
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
The H in THW probably designates it as 75°C insulation, versus TW being 60°C. In a number of areas, it was the default industrial building wire before THWN/THHN was popular. Earlier, THW aced out RHW with improved ease of handling.

[No hepcat electrician would use solid TW if he could get stranded THW.] At one time, TW was available in solid up to 6AWG.

[This message has been edited by Bjarney (edited 03-30-2003).]

#23913 - 03/31/03 01:25 PM Re: THW wire  
kale  Offline
Joined: Nov 2002
Posts: 174
"THW----PVC insulated building wire. Flame-retardant, moisture and heat-resistant, 75deg C. Dry and wet locations."

From Essex Wire&Cable Reference Guide 1997.

[This message has been edited by kale (edited 03-31-2003).]

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