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Joined: Nov 2000
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QO breakers up to 30 amps are listed for two conducotrs. Look at page 6 of the manual. http://www.squared.com/us/products/circuitb.nsf/07a0210021262d45862564b5006e4f84/41d81302e54de2a9852566c1004dd58c/$FILE/0730CT9801.pdf
Don(resqcapt19)
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Anonymous
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resq - Thanks for the info.
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Joined: Jul 2001
Posts: 599
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bigbluewirenut,
In my past life I worked as a Square D Field Engineer for 11 years. You need to talk to your SQD residential expert.
The use of non-Class CTL breakers in non-Class CTL panels is a violation of the UL listing. Is it done often? You betcha, but it still ain't legit.
To my knowledge there are no non-residential panelboards that are Class CTL. In fact the Square D Digest says these "cheater" breakers are for use in single-phase QO loadcenters and not in NQOD commercial/industrial panelboards, quote "Replacement Tandem Breakers for Use In Old Style Non-Class CTL QO Load Centers".
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Joined: Aug 2001
Posts: 335
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resqcapt1 Thanks for the Sq D ref. I dern sure printed the whole book and now have it in my service truck for the next time my inspector questions this.
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Anonymous
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JDB,
Thanks for clarification. I was going by what our rep. said and by what I have seen in the field. Yes, I have seen new installations, inspected and passed with tandem breakers installed. An yes they have been on NQOD panels. Does Square D have a traveling showroom? (Like Sylvania's light mobile.) We could sure use a visit up here in PA to get some issues straigtened out. Thanks again.
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Joined: Aug 2001
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I emailed this to a Square D rep about 2 wires under one clamp on QO breakers.
Youare correct the QO 15 thru 30amps are UL'ed to accept 2 conductors per the 0730CT9801 you refferenced.
Thank you for your Square D inquiry
Schneider Electric/Square D Company Jim Betournay Product Support Specialist Customer Information Center 1-888-778-2733
He has been most helpful. P.S. does anyone else receive the Teamworks news email from Square D?
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