Install Instructions

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
50W/sqft @ 240V
2 ft wide 3 ft wide
Model Length Model Length Amps Ohms
SM5024000824 8.0 SM5024000536 5 3.4 68 - 83
SM5024001224 12.0 5.0 43 - 53
SM5024001624 16.0 SM5024001036 10 6.7 32 - 39
SM5024002024 20.0 8.4 26 - 31
SM5024002424 24.0 SM5024001536 15.0 10.0 21 - 26
SM5024002824 28.0 11.7 18 - 22
SM5024003224 32.0 SM5024002036 20.0 13.4 15 - 18
SM5024003624 36.0 15.0 13 - 16
SM5024004024 40.0 SM5024002536 25.0 16.7 12 - 14
SM5024004424 44.0 18.4 11 - 13
SM5024004824 48.0 SM5024003036 30.0 20.0 10 - 12
SM5024005224 52.0 SM5024003536 35.0 23.4 8 - 10
50W/sqft @ 208V
2 ft wide 3 ft wide
Model Length Model Length Amps Ohms
SM5020800724 7.0 SM5020800536 5.0 3.4 59 - 73
SM5020801124 11.0 5.0 38 - 46
SM5020801424 14.0 SM5020801036 10.0 6.7 28 - 34
SM5020801824 18.0 8.4 22 - 27
SM5020802024 20.0 10.0 18 - 22
SM5020802424 24.0 SM5020801536 15.0 11.7 15 - 19
SM5020802824 28.0 13.4 13 - 16
SM5020802036 20.0 15.0 13 - 16
SM5020803424 34.0 16.7 11 - 14
SM5020803824 38.0 SM5020802536 25.0 18.4 10 - 12
SM5020804224 42.0 20.0 9 - 11
SM5020804824 48.0 SM5020803036 30.0 23.4 8 - 10
Table 1 (mat sizes)
50W/sqft @ 277V
2 ft wide 3 ft wide
Model Length Model Length Amps Ohms
SM5027700924 9.0 3.4 77 - 94
SM5027701424 14.0 SM5027701036 10.0 5.0 51 - 62
SM5027701824 18.0 6.7 37 - 46
SM5027702424 24.0 8.4 29 - 36
SM5027702824 28.0 SM5027701536 15.0 10.0 24 - 30
SM5027703224 32.0 SM5027702036 20.0 11.7 21 - 25
SM5027703624 36.0 13.4 17 - 21
SM5027704024 40.0 SM5027702536 25.0 15.0 15 - 19
SM5027704424 44.0 16.7 14 - 17
SM5027704824 48.0 SM5027703036 30.0 18.4 13 - 15
SM5027705224 52.0 20.0 11 - 14
SM5027705624 56.0 SM5027703536 35.0 23.4 10 - 12
38W/sqft @ 120V
2 ft wide
Model Length Amps Ohms
SM3812000524 5.0 3.2 42 - 53
SM3812001024 10.0 6.3 20 - 25
SM3812001524 15.0 9.5 13 - 17
SM3812002024 20.0 12.7 7 - 10
SM3812002524 25.0 15.8 6 - 8
SM3812003024 30.0 19.0 4 - 6