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3
INSULATING THE CABLE
Fibreglass insulation (including pre-formed fibreglass) with a maximum thickness
of ½ in. (13 mm) must be used over the heating cable to maintain a protection
temperature. The same insulation applied over the heating cable must be applied
over the temperature sensor. Insulation must be protected with an additional
waterproof overwrap using opposite spiralling.
WARNING: Never use
fibreglass or other non-
flammable insulation made
for pipe application that’s
more than ½ in. (13 mm)
thick. Over-insulation could
cause the heating cable
to overheat and result in
a serious fire hazard or
electrical shock.
WARNING: In compliance with all national, state, provincial and local
codes, we recommend the use of a ground fault circuit interrupter (GFCI)
receptacle or circuit breaker to reduce the danger of fire or electrical
shock from a damaged or improperly installed heating cable. Electrical
fault current caused by a damaged or improperly installed cable MAY
NOT BE LARGE ENOUGH to trip a conventional circuit breaker. If you DO
NOT know whether your electrical circuit is protected by a GFCI, ALWAYS
consult an electrician.
