|
0 members (),
506
guests, and
19
robots. |
Key:
Admin,
Global Mod,
Mod
|
|
|
Joined: Jan 2004
Posts: 1,507
OP
Member
|
Has anyone on this forum ever installed or been asked to install the secondary conductors of a welder in conduit? What was your response?
George Little
|
|
|
|
Joined: Jan 2003
Posts: 4,391
Moderator
|
Nope
My response would be along the lines of uses not permitted unless the leads said RHW or some other 310.13 insulation.
Bob Badger Construction & Maintenance Electrician Massachusetts
|
|
|
|
Joined: Feb 2005
Posts: 219
Member
|
First off, No never been asked that. But as a response, First thought is...Why?. Kinda ruins the portability of the leads. Then, what type of conduit are we talking about? Then, If that is what you want...your the customer. Conduit, Wire Size & Wire Type would all be factors to do the installation correctly.
Rob
|
|
|
|
Joined: Jan 2004
Posts: 1,507
OP
Member
|
When I was wearing the tools, I was asked to run the "hot" lead to several places in the building that was aboyt 20k square feet and then the welder was left in one spot (in the shop) and the person doing the welding only had about a 25' stinger lead that would be plugged in to various outlets via a cam lock type connector. The Ground was usually established via the piping or conveyers throughout the building.
The other installation where I was involved as the Inspector not an installer, had to do with a coupla sports events ( the US PGA Open and the Rider Cup) where the welder cable was used for feeders and branch circuits. This was however not in a raceway and this seems to be standard fare for this type of event. I'm not sure this is kosher but it sure worked well and was practical.
Any information on the use of welder cable for other than secondary conductors for a welder would be appreciated.
George Little
|
|
|
|
Joined: Nov 2000
Posts: 2,148
Member
|
Bob, As long as the welding cables are being used for welding, I see no reason why they can't be in conduit. Don
Don(resqcapt19)
|
|
|
|
Joined: Jan 2003
Posts: 4,391
Moderator
|
Don how are you figuring that?
Welder output or not it is still a flexible cord.
George
I would not run one lead I would run both to the point of use.
Bob Badger Construction & Maintenance Electrician Massachusetts
|
|
|
|
Joined: Jan 2003
Posts: 4,391
Moderator
|
George some welding cable carries the RHW insulation marking making it suitable for raceways.
I am not sure it is suitable for portable power cable unless marked as such.
All the temp generators we hook up we use what looks like welding cable but is labeled as portable power cable. The conductors must be run in close proximity to each other.
Bob Badger Construction & Maintenance Electrician Massachusetts
|
|
|
|
Joined: Jan 2004
Posts: 1,507
OP
Member
|
Bob- I wonder why you'd want to run both conductors to the point of use?
Edited for added thought- Does anyone have a source for information on the ampacity of welder cable? Nothing in the NEC to my knowledge.
[This message has been edited by George Little (edited 12-24-2005).]
George Little
|
|
|
|
Joined: Jan 2003
Posts: 4,391
Moderator
|
Bob- I wonder why you'd want to run both conductors to the point of use? Well doing it the way you described above seems like you could have a mighty hot conduit (assuming it is ferris) containing that one lead.
Bob Badger Construction & Maintenance Electrician Massachusetts
|
|
|
|
Joined: Nov 2000
Posts: 2,148
Member
|
Bob, Don how are you figuring that? Because Article 630 doesn't say I can't. Note, I am assuming that we are not talking about the power supply conductors to the welder, but the secondary conductors from the welding machine. Don
Don(resqcapt19)
|
|
|
Posts: 7,382
Joined: April 2002
|
|
|
|
|