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Pre-Installation Check
The heating cable should be tested to ensure electrical integrity with at least a 500 Vdc megohmmeter (megger)
between the grounding pin and any of the other two pins. Minimum resistance should be 20 megohms.
Readings below 20 megohms indicate the electrical insulation has been damaged and the heating cable must be
replaced.
Ensure that the service voltage available is correct for the heating cable.
Clear all gutters and downspouts of combustible debris such as leaves, pine needles,
All sharp edges that may come in contact with the heating cable should be smoothed by either filing or bending
them down. Alternately, use a fixing bracket to protect the heating cable from damage by the sharp edge such
as gutter edges, downspout fittings, or screws.
Laying Out the Heating Cable
Please refer to section B, "Attaching the cable".
While the cable is being laid out on the roof, loose attachment of the clips and spacers is recommended in case
adjustments must be made.
Final installation step
For excess cable, triangles can be made larger or cable loops in valleys can be extended. Alternatively, if a
downspout is present at the end of the roofline being treated, the cable may be routed back up the downspout to
take up the excess.
For slight shortages, triangles can be made smaller on areas of the roof that are less susceptible to ice dams.
Check that the heated portion of the cable has not been moved from its intended position.
Place the caution labels on the circuit breaker/fuse panel or on the ON/OFF switch.
Remove the cable
To remove the cable, wait for suitable weather conditions. Then unplug the cable. Open the clips with pliers
and remove the cable. Take care when removing cable from a downspout to avoid snagging or cutting the cable
on sharp edges.
C. Installation instructions
11
seeds,
or windblown trash.
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