Qwik-Gard® ground fault circuit interrupters offer a means of providing ground fault protection for people. Qwik-Gard® people protection ground fault circuit interrupters are built as Class A devices in accordance with UL standard 489 and CSA C22.2 No. 144 for ground fault circuit interrupters (GFCIs). Class A devices must trip at 6 mA of ground fault current and above and hold below 4 mA of ground fault current. Qwik-Gard® GFCIs provide the same branch circuit protection as standard QO™ circuit breakers. They are longer than standard QO™ circuit breakers and thus require more gutter space. All QO™ electrical accessories except shunt trip and all QO™ mechanical accessories are available for QO-GFI and QOBGFI circuit breakers.