1" module, 120/240 Volts ac; 10,000 AIC. Copper-to-copper connections, calibrated for optimum trip performance, heat resistant thermoset cases and covers, cemented calibration screw. May be used, when marked to accept, with American Switch, Arrow Hart, Bryant, General Switch, GTE, Sylvania, most ITE, Murray, Westinghouse Type BR, Challenger, Crouse-Hinds. 15 to 30 amp 14 - 8 Cu or 12 - 8 Al AWG wire, 35 to 60 amp 8 - 3 Cu or 8 - 2 Al AWG wire. U.L. Listed, HACR rated.