9
Pre-Installation Checks
First make sure that the area to be heat-
ed complies with the data in the design
instructions. Establish where the junction
boxes are to be installed and check that
the connection leads are long enough.
The length is 3 m. Thoroughly clean the
substratum before starting to install the
heating cables, as sharp objects can
damage the heating cable.
Test the heating cable with an ohmmeter
before installation. This involves measur-
ing the ohmic resistance of the conduc-
tor and the insulation resistance of the
fl exible connection lead. The conductor
resistance is measured with an ohm-
meter. A deviation of up to 10% from the
nominal resistance is permissible. See
table on page 3.
Connection lead
Conductor
Ohmmeter
Braid
Insulation
resistance
tester
Connection lead
The insulation resistance should be measured with the aid of a 2500 V
(500 V minimum) insulation resistance tester. The reading should be 100 M.
Braid
Conductor
Record all the measured values on the Installation Test Record provided.
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