Single phase, 3 wire, 16 total 1-pole spaces, 120/240 Volts AC. 8 spaces 1p, 4 spaces 2p max 1″ THQL; 16 spaces 1p , 6 spaces 2p max 1/2″ THQP. 22,000 AIC, with door. Includes tin-plated copper bus, galvanized mounting rails, combo slotted/#2 Robertson screws, 100% neutral terminations and full length bondable neutral. No.TGK12 equipment ground kit sold separately. Suitable for use as service equipment when installed in accordance with the NEC. 6 – 3 AWG main lug wire range. U.L. Listed for bottom mounted lugs by installing complete unit upside down, No.TRL22B bottom feed door handle not included. U.L. Listed, No.67 panelboards. For converting to main breaker use No.THQLRK2 retainer kit and 2-pole circuit breaker (not included).