Switching Duty (SWD) Circuit Breakers
QO and QOB circuit breakers are suitable for switching 120 Vac fluorescent lighting loads. The
switching duty (SWD) listing applies only to one-pole 15 and 20 A circuit breakers rated at 347 Vac or
less. The circuit breakers are subjected to specified temperature rise tests at predetermined periods
during the endurance operations.
Terminations
The 10–30 A circuit breakers have pressure plate terminals suitable for single or two-wire terminations.
Copper or aluminum conductors may be used as outlined in Table 2. QO-GFI 15–30 A and QO-AFI
circuit breakers have pressure plate terminals suitable for single-wire terminations. These circuit
breakers are suitable for use with 60°C or 75°C conductors.
The QO 35–200 A and all QO-PL and QOT tandem circuit breakers have box-type lugs suitable for
single-wire terminations. These circuit breakers are suitable for use with 75°C conductors.
Special Application Circuit Breakers
There are several special application circuit breakers in the QO family:
• QO-HM and QOB-HM High-Magnetic Circuit Breakers
• QO-HID and QOB-HID Circuit Breakers
• QO and QOB Miniature Switches
• QOK and QOBK Key-Operated Circuit Breakers
• QO-GFI and QOB-GFI Qwik-Gard
Circuit Breakers
• QO-EPD and QOB-EPD Equipment Protection Devices
• QO-SWN and QOB-SWN Switch Neutral Circuit Breakers
• QOT Tandem Circuit Breakers
• QO-PL and QOB-PL Powerlink
Circuit Breakers
• QO-AFI and QOB-AFI Branch Feeder Arc-Fault Circuit Interrupters (AFCI)
• QO-CAFI, QOB-CAFI Combination Arc-Fault Circuit Interrupters (AFCI)
This following sections describe the special application circuit breakers and provides application
information for their use.
