17
Supplementary Asphalt Work
Work such as drain installation and
placement of anchor bolts is often done
after the initial asphalt pour. Consult the
drawing of the layout so that damage to
the heating cable can be avoided.
After all such work has been completed,
perform an insulation resistance test and
record the result on the Installation Test
Record.
Purpose
The drain tracing system ensures that melt
water can drain away.
Note: the drain tracing circuit
should be controlled by the same
control system as the other hea-
ting circuits.
Tools
• 2500 V insulation ohmmeter
(min. 500 V)
Install Junction box (11)
Choose a position:
• close to the drain
• indoors if possible.
Install Connection Kit (12)
Terminate the 8BTV-2-CT heating cable
into the junction box in accordance with
the instructions provided with the Connec-
tion Kit.
Drain Tracing System with Self-Regulating Heating
cable 8BTV-2-CT
Lay out the Heating cable (13)
Protect the heating cable with conduit
between the junction box and the drain.
Trace the entire length of the drain to
ensure that melt water will always have
a run-off path.
Install the End Seal (14)
Install the end seal following the instruc-
tions provided with the End Seal kit.
Perform an Insulation
Resistance Test
The insulation resistance test detects
damage to the heating cable such as
cuts or punctures. It should be carried
out using a 2500 Vdc instrument. Lower
voltage instruments are less sensitive and
are not recommended. The instrument
should have a test voltage of not less than
500 Vdc.
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