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
Sprinklered equipment 26-008
by bigpapa
12/02/16 04:24 PM
On Delay Relay with Auto Reset
by Potseal
12/01/16 09:59 AM
Wow, that was close!
by jraef
11/28/16 07:06 PM
Earthquake in New Zeeland
by RODALCO
11/27/16 11:25 PM
Calling all Non-US members!! (Non-US only)
by Tjia1981
11/27/16 06:33 AM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 14
HotLine1 10
Trumpy 8
Texas_Ranger 8
sparkyinak 7
Who's Online
0 registered (), 198 Guests and 5 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#76955 - 04/05/01 11:25 AM Welding Cable
Brian Offline
Junior Member

Registered: 04/05/01
Posts: 1
Loc: Anaheim, CA, USA
My question is regarding the use of welding cable in panels. Suppliers list the amperage ratings for welding cable. However, the NEC states very little about the use of welding cable other than with welding equipment.

Welding cable offers a couple of great advantages. First, it is very flexible in tight locations. Second, the ampacity is much higher for smaller gauges in comparison to THHN cable for example.

Is welding cable suitable for short distances as an alternative? I have a situation where it would be extremely helpful to use welding cable and was wondering if anyone have any information on this subject.

Top
2014 / 2011 NEC & Related Books and Study Guides
#76956 - 04/05/01 12:58 PM Re: Welding Cable
sparky Offline
Member

Registered: 10/18/00
Posts: 5545
i beleive it's already done in some applications requiring flexibility.

is this wire type at all referenced in the NEC? #'s or lettered designation...

Top
#76957 - 04/05/01 06:16 PM Re: Welding Cable
sparky66wv Offline
Member

Registered: 11/17/00
Posts: 2339
Loc: West Virginia
Here's my problem with using them...

Welding cable is generally smaller than other cable, for a given ampacity, which has many advantages. However, the temp rating is based on the entire circuit including terminals and devices. At a given ampacity, the welding cable will be warmer, the insulation may be rated for higher temps, but the teminal and device ratings will still prevent you from being allowed to exceed a certain temperature. At this point you're back at square one using the same size cable.

Also, what voltage is welding cable rated for? Most welders are well below 120V to ground, and the insulation may not have the dielectric strength for 600V at higher temps.
_________________________
-Virgil
Residential/Commercial Inspector
5 Star Inspections
Member IAEI

Top
#76958 - 04/05/01 08:28 PM Re: Welding Cable
resqcapt19 Offline
Member

Registered: 11/10/00
Posts: 2209
Loc: IL
Much of the welding cable has 600 volt insulation, but it is not listed for use in power circuits. The manufacture's information usually says "only for use as secondary conductors for welding equipment". Type W power cable is of the same construction as welding cable but is listed for power circuits and is covered in Article 400. I have used welding cable for temporary power connections with no problems, but never for permanent connections.
Don(resqcapt19)
_________________________
Don(resqcapt19)

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