S1 (120Vac) and S2 (208-277Vac) High Performance 12 Watt/foot Roof Heater Cable Maximum Circuit Lengths In Feet

Model Number Operating Voltage Start-up Temp Design Load
(Amps/foot) @ 0° F.
Startup
Circuit Breaker Size  
20A 30A 40A
S1 120 Vac 20° F. 135 175 175
0° F. 0.155 105 155 175
S2 208 Vac 20° F. 245 350 350
0° F. 0.083 190 290 350
S2 240 Vac 20° F. 250 350 350
0° F. 0.080 200 295 350
S2 277 Vac 20° F. 255 350 350
0° F. 0.077 205 310 350

Important: Ground fault protection is required for each circuit. Use only Summit Ice Melt Systems approved components for this type heating cable.
Download S1 and S2 high performance heater cable specifications

Download S1 and S2 high performance heater cable construction and Technology Data Sheet

S1 And S2 Heater Cable Construction, Specifications, and Approvals