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Can a QO2150, QO2175, QO2200 or QO2225SL be used in a QO three-phase load center?

Published date: 05 December 2018

Can the 2 pole high Amp QO breakers and sub feed lugs which take 4 spaces be used in a QO three-phase load center?

Product Line:
QO Three Phase Load Centers

Branch Breakers

These branch breakers and sub-feed lug kit can be applied ONLY in Square D QO SINGLE PHASE load centers, Series G1 (See Note #1), S1 or S2, rated 150 - 225 ampere or QON SINGLE PHASE (See Note #2) load centers rated 300 - 400 ampere. THEY ARE NOT SUITABLE FOR USE IN ANY QO OR QON THREE PHASE LOAD CENTER.

NOTE #1: Use only in Series G1 single phase QO 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, 300 - 400 ampere load centers, when mounted in MH50 or MH53 boxes and using MHC50VF or MHC50VS or MHC53VF or MHC53VS covers, the cover should be replaced with MHC50QVF or MHC50QVS or MHC53QVF or MHC53QVS, if over 10kAIC available. If mounted in MH68 box with MHC68VF or MHC68VS cover, no replacement cover would be required.

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