Issue:
Using QO branch breakers and sub feed lug kit in QO load center
Cause:
Installation of 150A - 200A breakers
Resolution:
The mentioned branch breakers and subfeed lug kit can be applied in any Square D QO SINGLE PHASE load center, series G1 (See Note #1) or series S, rated 150 - 225 ampere or QONQ SINGLE PHASE (See Note #2) load centers rated 300 - 400 ampere. The branch breaker ampacity cannot exceed the load center mains ampacity rating. THEY CANNOT BE USED IN ANY QO OR QONQ THREE PHASE LOAD CENTERS.
NOTE #1: Use only in Series G1 single phase load centers manufactured since 8/8/1986 (date code H08Sxxxx). The date code is stamped on the wiring diagram or box label. Also, the interior label located on the load centers interior assembly will list Type QOC breakers.
NOTE #2: In existing QON single phase, 300 - 400 ampere load centers, when mounted in MH50 or MH53 boxes and using MHC50VF, MHC50VS, MHC53VF, or MHC53VS covers, the cover should be replaced with MHC50QVF, MHC50QVS, MHC53QVF, or MHC53QVS (respectively), if over 10 kAIC is available. If mounted in MH68 box with MHC68VF or MHC68VS cover, no replacement cover would be required.
NOTE #3: Please refer to the installation bulletin supplied with the device for further restrictions regarding mounting these devices or adjacent branch circuit breakers.
Using QO branch breakers and sub feed lug kit in QO load center
Product Line:
Load Center
Environment:
QO Load Centers
Cause:
Installation of 150A - 200A breakers
Resolution:
The mentioned branch breakers and subfeed lug kit can be applied in any Square D QO SINGLE PHASE load center, series G1 (See Note #1) or series S, rated 150 - 225 ampere or QONQ SINGLE PHASE (See Note #2) load centers rated 300 - 400 ampere. The branch breaker ampacity cannot exceed the load center mains ampacity rating. THEY CANNOT BE USED IN ANY QO OR QONQ THREE PHASE LOAD CENTERS.
NOTE #1: Use only in Series G1 single phase load centers manufactured since 8/8/1986 (date code H08Sxxxx). The date code is stamped on the wiring diagram or box label. Also, the interior label located on the load centers interior assembly will list Type QOC breakers.
NOTE #2: In existing QON single phase, 300 - 400 ampere load centers, when mounted in MH50 or MH53 boxes and using MHC50VF, MHC50VS, MHC53VF, or MHC53VS covers, the cover should be replaced with MHC50QVF, MHC50QVS, MHC53QVF, or MHC53QVS (respectively), if over 10 kAIC is available. If mounted in MH68 box with MHC68VF or MHC68VS cover, no replacement cover would be required.
NOTE #3: Please refer to the installation bulletin supplied with the device for further restrictions regarding mounting these devices or adjacent branch circuit breakers.
Released for:Schneider Electric Canada
