The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Correct rotation, wrong sequence
by Potseal
Today at 03:14 PM
Industrail Control Panel bonding per 409.108
by sparkyinak
Yesterday at 06:29 PM
Calling all Non-US members!! (Non-US only)
by aussie240
12/07/16 02:39 AM
Photo Upload Tutorial
by DanK
12/06/16 11:35 PM
Sprinklered equipment 26-008
by bigpapa
12/02/16 04:24 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 11
HotLine1 10
Potseal 9
sparkyinak 8
Texas_Ranger 7
Who's Online
0 registered (), 218 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#76793 - 03/21/01 05:29 PM URD Cable
Tim M Offline
Junior Member

Registered: 03/01/01
Posts: 4
I have spoke to supply houses who use the term URD for a direct burial type of cable similar to triplex. What is this found under in the NEC and UL Whitebook? Is it USE?

Top
2014 / 2011 NEC & Related Books and Study Guides
#76794 - 03/22/01 03:16 AM Re: URD Cable
sparky Offline
Member

Registered: 10/18/00
Posts: 5545
it comes marked USE/URD


Top
#76795 - 03/22/01 12:41 PM Re: URD Cable
Bennie R. Palmer Offline
Member

Registered: 11/09/00
Posts: 72
Loc: Milwaukie, OR 97267 USA
Sparky must be in a hurry This question appears often, and is asked quite frequently in the field. I have heard of inspectors not allowing cable assemblies identified as URD, for the reasons you state. The inability to locate any approval in publications, is the general reason.
URD, or underground residential distribution cable, can be USE, underground service entrance cable. When it is service entrance cable it is commonly, 3 conductors of Aluminum XHHW, with one conductor identified.
URD identified distribution cable can be medium voltage cable, in the range of 4.16 KV, to 34.5 KV. Of course this will not be marked as USE.

Top
#76796 - 03/22/01 04:27 PM Re: URD Cable
Tim M Offline
Junior Member

Registered: 03/01/01
Posts: 4
Thanks. It helps to know what the abbreviations are. I then conclude URD/USE is used for primary and secondary for residential underground, and USE is secondary?

Top
#76797 - 03/22/01 06:30 PM Re: URD Cable
Bennie R. Palmer Offline
Member

Registered: 11/09/00
Posts: 72
Loc: Milwaukie, OR 97267 USA
Tim: Only URD for 600 volts or less will be identified as USE.
URD for primary medium voltage will be PE, XLP, EPR, PVC, or CSP.

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals