Square D Digest 179

QO Indoor Load Centers, Single Phase Class 736, 1130 / Refer to Catalog 1100CT0501

QO™ Load Centers

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Field-Installed Main Circuit Breaker Kits, 1Ø

Table 1.18: QOM1 Frame Size—Use with Convertible Main Load Centers Only Main Circuit Breaker Rating [4] Convertible Load Center Mains Rating 22kAIR [5] Lug Wire Size [6] AWG/ kcmil Main Circuit Breaker 50A 100–125 QOM50VH

QOM60VH QOM70VH QOM80VH QOM90VH QOM100VH QOM110VH QOM125VH

60A 70A 80A 90A

100–125 100–125 100–125 100–125 100–125

12–2/0 Al or Cu

QOM1 Frame Size 50–125 Amperes

100A 110A 125A

125 125

1 LOAD CENTERS

Table 1.19: QOM2 Frame Size—Use with Convertible Main Load Centers Only Main Circuit Breaker Rating [4] Convertible Load Center Mains Rating 22kAIR [5] Lug Wire Size [6] AWG/kcmil Main Circuit Breaker [7] 100A 150–225 QOM2100VH

QOM2125VH QOM2150VH QOM2175VH QOM2200VH QOM2225VH

125A 150A 175A 200A 225A

150–225 150–225 200–225 200–225

4–300 Al or Cu

225

QOM2 Frame Size 100–225 Amperes

Do not exceed the load center mains rating.

[4]

[5] 22 k AIR main circuit breaker UL Listed for use ahead of QO, QOT and QO-PL 10 k AIR branch circuit breakers to permit their application on systems with up to 22 kA available fault current. [6] Wire range listed for QOM circuit breaker kits is the wire range of that circuit breaker. To find out maximum wire size permitted in a particular load center per UL, see Main Wire Size in that load center table. [7] Add suffix 1021 for 120, 208 or 240 Vac shunt trip.

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