120V Commercial Heat Tape Specs Our 120v commercial heat tape comes in the following sizes, and requires the following amps (6w/ft normally, and up to 9.6w/ft @ 32º or lower): Min (6 W/ft) Max (9.6 W/ft) Feet Watts Amps Watts Amps 6 36 0.30 57.6 0.48 12 72 0.60 115.2 0.96 18 108 0.90 172.8 1.44 24 144 1.20 230.4 1.92 37.5 225 1.88 360 3.00 50 300 2.50 480 4.00 62.5 375 3.13 600 5.00 75 450 3.75 720 6.00 87.5 525 4.38 840 7.00 100 600 5.00 960 8.00 112.5 675 5.63 1080 9.00 125 750 6.25 1200 10.00 137.5 825 6.88 1320 11.00 150 900 7.50 1440 12.00