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To calculate the amount of cable needed, multiply roof edge
length
to be heat traced by the spacing factor.
The spacing factor (feet of cable required per foot of roof edge) is determined by the roof overhang, heating width (A) and heating height (B): |
| Roof Overhang | Heating Width | Heating Height | Spacing Factor |
| 12" | 2 | 18" | 2 |
| 24" | 2 | 30" | 3 |
| 36" | 2 | 42" | 4 |
Add the total gutter length and the total
downspout length
to the figure calculated above.
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Also add enough cable to provide a drip loop prior to going into the box, typically 6" to 36", to get the total length of cable required. Determine how many circuits are required. Divide the total length of cable by the maximum circuit length. Round that number up (for example, 2.1 to 3)to get the total number of circuits. |
Self Regulating Roof and Gutter Heating Cable
120V Or 208 / 277 volt - with braid and weatherproof jacket
Note: Must Be Ordered In 100 ft. Increments Or A $25.00 Cutting Charge Is Assessed
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| Quan. in Feet: | Size: |
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Heaters and the Complete F.N. Cuthbert Line At www.shopfnc.com
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