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Symptom
Circuit Breaker Trips
Low insulation resistance
Icing problems persist
D. Troubleshooting
Problem causes
Circuit breaker is
undersized
Defective circuit breaker
Parts of the electrical
circuit become wet
Physical damage to the
heating cable may be
causing a direct short
GFCI is undersized
Nicks or cuts in the
heating cable.
Short between the braid
and heating cable core or
the braid and metal gutters
or downspouts
The cable layout pattern
does not prevent ice dams
Loss of power
14
Correction
Replace the circuit breaker if defective or
improperly sized.
Check to see if existing power wire sizing is
compatible with larger-sized breakers.
Use a weatherproof receptacle.
Check for where there may have been
maintenance work done.
Replace damaged heating cable.
Replace undersized GFCI with 30 mA GFCI.
Replace the cable with a new one.
Observe and record these conditions. Adjust
cable pattern when conditions are suitable.
Rearrange and supply more cable to the needed
areas or reduce the cable in an area that is not as
susceptible to ice dams.
Check the power supply to the cable.
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