UL question

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RichB

RichB

Senior Member
Location
Tacoma, Wa
Occupation
Electrician/Electrical Inspector
OK folks,

Here goes;

Haven't had a chance to get to my UL books and look this up so you get to answer it.

I currently have some circuit breakers in a panel (120VAC/20A) that have 2 wires landed under the load side lug. There is no labeling on the breaker indicating it is ok for more than one conductor.

The UL listing for these states that they are " suitable fore multi-wire circuits".

Question is--what do they mean by "multi-wire"--more than one conductor per lug or a multi-wire branch??:?

Thoughts?

Thanks!!@!
Rich
 
RichB said:
OK folks,

Here goes;

Haven't had a chance to get to my UL books and look this up so you get to answer it.

I currently have some circuit breakers in a panel (120VAC/20A) that have 2 wires landed under the load side lug. There is no labeling on the breaker indicating it is ok for more than one conductor.

The UL listing for these states that they are " suitable fore multi-wire circuits".

Question is--what do they mean by "multi-wire"--more than one conductor per lug or a multi-wire branch??:?

Thoughts?

Thanks!!@!
Rich
Click to expand...

Unlanding the two wires and pigtailing to the breaker would be faster than asking or looking up breaker types to see which can accept two wires. Good to ask of course, but you asked for thoughts on the matter. :cool:

Then again, committing to memory which types can accept two like jumper did would have saved me 10 minutes work a year ago. I remember a CH CH loadcenter (tan handles) with 2 double stabbed breakers. I fixed it and didnt have to. I favor simplicity: most breakers cant accept two wires, so I dont wire any that way.

Multi wire circuit to me means MWBC, not two wires per breaker. Also, any listed for such probably required two identical sized wires.
 
OK,

Here is the excerpt from UL-- -

Single-pole or multi-pole independent trip circuitbreakers with handle ties rated 120/240 V ac, are suitable for use onmulti-wire circuits with line-to-line or line-to-neutral connected loads.

To me this means it is for either a 240VAC line to line or a MWBC, not two conductors under a lug.

Thanks, for the responses!!

Rich
 
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