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7
Test Procedures
Raychem-IM-H58067-IceStopRoofGutterDeIcingCOM-EN 18/01
The approximate location of the fault, expressed as a
percentage of the heating cable length from the front
end, is:
Fault location: D =
1/A
x 100
________
(1/A + 1/B)
Example:
A = 100 ohms
B = 25 ohms
Fault location: D = (1/100) / (1/100 + 1/25) x 100
= 20%
The fault is located 20% from the front end of the
circuit.