ProMelt Installation Manual
6
STEP 1.4 (ProMelt Mat Only)
Select the ProMelt Mat(s) you need. (for ProMelt Cable sizes see next page)
WATTAGE: Decide what heat output is required. Your design must consider weather conditions and how critical it is
to clear the heated area.
Mat with 50 watts per square foot heat output are sufficient to clear most moderate and heavy snowfall rates.
Mat with 38 watts per square foot heat output are sufficient to clear most light to moderate snowfall rates.
SIZE: ProMelt Mat is manufactured in a variety of sizes as shown in Table 1. If the exact size of mat is not found in the
Table, select the next smaller mat size.
AMPS and VOLTS: Pay careful attention to the amps to make sure your controls, circuit breaker panel, and wiring will
have the proper capacity. Design everything to handle 125 percent of heating mat load:
-20 amp circuit for load up to 16 amps
-30 amp circuit for load up to 24 amps
-40 amp circuit for load up to 32 amps
-50 amp circuit for load up to 40 amps
-70 amp circuit for load up to 50 amps
Table 1 (mat sizes)
38W/sqft @ 240VAC
2 ft wide
Model Length Amps Ohms Watts
SM3824001024 10.0 3.2 65-81 760
SM3824002024 20.0 6.3 31-39 1520
SM3824003024 30.0 9.5 20-26 2280
SM3824004024 40.0 12.7 14-19 3040
SM3824005024 50.0 15.8 11-15 3800
SM3824006024 60.0 19.0 9-13 4560
38W/sqft @ 120VAC
2 ft wide
Model Length Amps Ohms Watts
SM3812000524 5.0 3.2 42 - 53 380
SM3812001024 10.0 6.3 20 - 25 760
SM3812001524 15.0 9.5 13 - 17 1140
SM3812002024 20.0 12.7 7 - 10 1520
SM3812002524 25.0 15.8 6 - 8 1900
SM3812003024 30.0 19.0 4 - 6 2280
50W/sqft @ 208VAC
2 ft wide
Model Length Amps Ohms Watts
SM5020800724 7.0 3.4 59-74 700
SM5020801124 11.0 5.3 40-50 1100
SM5020801424 14.0 6.7 28-35 1400
SM5020801824 18.0 8.7 23-29 1800
SM5020802024 20.0 9.6 17-22 2000
SM5020802424 24.0 11.5 15-20 2400
SM5020802824 28.0 13.5 13-17 2800
SM5020803424 34.0 16.3 10-13 3400
SM5020803824 38.0 18.3 9-12 3800
SM5020804224 42.0 20.2 8-11 4200
SM5020804824 48.0 23.1 7-10 4800
50W/sqft @ 277VAC
2 ft wide
Model Length Amps Ohms Watts
SM5027700924 9.0 3.2 77-95 900
SM5027701424 14.0 5.1 51-63 1400
SM5027701824 18.0 6.5 36-45 1800
SM5027702424 24.0 8.7 31-39 2400
SM5027702824 28.0 10.1 24-31 2800
SM5027703224 32.0 11.6 20-26 3200
SM5027703624 36.0 13.0 17-22 3600
SM5027704024 40.0 14.4 15-19 4000
SM5027704424 44.0 15.9 13-17 4400
SM5027704824 48.0 17.3 12-16 4800
SM5027705224 52.0 18.8 11-14 5200
SM5027705624 56.0 20.2 8-11 5600
50W/sqft @ 277VAC
3 ft wide
Model Length Amps Ohms Watts
SM5027701036 10.0 5.4 55-68 1500
SM5027701536 15.0 8.1 29-37 2250
SM5027702036 20.0 10.8 19-25 3000
SM5027702536 25.0 13.5 14-18 3750
SM5027703036 30.0 16.2 11-15 4500
SM5027703536 35.0 19.0 11-14 5250
50W/sqft @ 208VAC
3 ft wide
Model Length Amps Ohms Watts
SM5020800536 5.0 3.6 64-80 750
SM5020801036 10.0 7.2 30-38 1500
SM5020801536 15.0 10.8 14-19 2250
SM5020802036 20.0 14.4 11-15 3000
SM5020802536 25.0 18.0 9-12 3750
SM5020803036 30.0 21.6 7-9 4500
50W/sqft @ 240VAC
2 ft wide
Model Length Amps Ohms Watts
SM5024000824 8.0 3.3 68-84 800
SM5024001224 12.0 5.0 43-54 1200
SM5024001624 16.0 6.7 32-40 1600
SM5024002024 20.0 8.3 26-32 2000
SM5024002424 24.0 10.0 21-27 2400
SM5024002824 28.0 11.7 18-23 2800
SM5024003224 32.0 13.3 15-19 3200
SM5024003624 36.0 15.0 13-17 3600
SM5024004024 40.0 16.7 12-15 4000
SM5024004424 44.0 18.3 11-14 4400
SM5024004824 48.0 20.0 10-13 4800
SM5024005224 52.0 21.7 8-11 5200
50W/sqft @ 240VAC
3 ft wide
Model Length Amps Ohms Watts
SM5024000536 5.0 3.1 64-80 750
SM5024001036 10.0 6.3 30-38 1500
SM5024001536 15.0 9.4 20-25 2250
SM5024002036 20.0 12.5 14-18 3000
SM5024002536 25.0 15.6 11-15 3750
SM5024003036 30.0 18.8 9-12 4500
SM5024003536 35.0 21.9 8-11 5250