Square D QO double-tapped

[mdamato (Michael Damato, 24GI00153900)]

Hi All,

I’ve run across a Square D QO series panel with some double-lugged breakers. It appears to have the proper screw plate with the two channels that allows it to be safely double tapped. However, I can’t find any labels that say “1 or 2 conductors…”.

Strictly speaking, the code says a double tap is OK only if there is manufacturer labeling. Does this mean I ought to call this out, even though it seems to be the type that it’s OK to double tap?

Thanks!

Mike

[cevans (Chuck Evans, CMI)]

Need a good clear photo

[btoye (Bradley Toye, CMI)]

Do not call these out just because you could not see the labeling. Have the specs for SQD breakers on hand if you need them.

[tplatt (Timothy Platt)]

@mdamato

Hi All,
Strictly speaking, the code says a double tap is OK only if there is manufacturer labeling. Does this mean I ought to call this out, even though it seems to be the type that it’s OK to double tap?

The code says, “used in accordance with any instructions included in the listing or labeling.”

As long as they are listed for two wires, they need not have a label to that effect. All is well!

Edited to add: “Labeled” means it has a mark like UL or CE.

[mdamato (Michael Damato, 24GI00153900)]

Thanks all. Unfortunately I don’t have a good photo of this one. It definitely had the channel plate under the lug.

How can I look up the listing? Square D website?

[rmeier2 (Robert Meier)]

Type QO breakers are listed for one or two conductors within a certain range. You can find this on the Square D website. Also if you access to a CB you can see the diagram on the side of the breaker.

[tplatt (Timothy Platt)]

@mdamato

Thanks all. Unfortunately I don’t have a good photo of this one. It definitely had the channel plate under the lug.

How can I look up the listing? Square D website?

You can find the mfr data at SquareD:
QO™ and QOB Miniature Circuit Breakers | Schneider Electric

15-30a are listed for 2.

[lkage (Larry Kage, CMI)]

@mdamato

Hi All,

I’ve run across a Square D QO series panel with some double-lugged breakers. It appears to have the proper screw plate with the two channels that allows it to be safely double tapped. However, I can’t find any labels that say “1 or 2 conductors…”.

Strictly speaking, the code says a double tap is OK only if there is manufacturer labeling. Does this mean I ought to call this out, even though it seems to be the type that it’s OK to double tap?

Thanks!

Mike

Is this what you are describing, Mike?

Sometime there is a small label description, too. Sorry my pic got cut down:

[mdamato (Michael Damato, 24GI00153900)]

Thanks everyone very much. I wasn’t aware of the listing ranges. That’s going to be very helpful, since those labels are sometimes almost impossible to read.

[Jim_Port]

The indicator is on the side of the breaker. Being familiar with breakers also helps.

[mdamato (Michael Damato, 24GI00153900)]

Yes, exactly Larry. It seems there isn’t always a label, but that pressure plate is what mechanically enables the safe double tap, so that is what really matters I would think.

[lsquadere (Larry Squadere)]

i know this thread is very old. But i learned something new today and thank you all

[lkage (Larry Kage, CMI)]

Welcome to our forum, Larry!..enjoy participating.

[rmeyers5 (Rollie Meyers)]

CE is meaningless in the US it is a manufacturers self certification in the EU.

Here is a list of NTRL’s

https://www.osha.gov/nationally-recognized-testing-laboratory-program/current-list-of-nrtls