Technical UL/CSAMaximum Operating Voltage UL/CSA:110 V DC480Y / 277 V ACInterrupting Rating acc. to UL1077:(277 V AC) 6 kA(480Y / 277 V AC) 6 kA(240 V) 10 kAConnecting Capacity UL/CSA:Busbar 18-8 AWGConductor 18-4 AWGTightening Torque UL/CSA:18 in·lbDimensionsWidth in Number of Modular Spacings:2.0P..