Embedding Works - Concrete Pouring - nVent RAYCHEM EM4-CW Manuel D'installation

EMBEDDING WORKS - CONCRETE POURING

Checks
Perform the following checks before the
embedding works:
• check for signs of heating cable damage
• check the cable spacing
• check the height of the heating cable
Resistance tests
Perform the resistance tests on each heating
cable circuit to detect any
damage which may have occurred after
installation.
Record the results on the Installation Test
Record.
When the concrete team arrives, have them verify
the resistance results and sign the Installation
Test Record.
Warning:
Precautions should be taken during the
concrete pour to prevent the heating cable
from being exposed to unnecessary abuse:
• Avoid excessive concrete drop
heights.
• Take care when using shovels
and rakes during the pour.
During the embedding
Monitor the insulation resistance continuously
during the pour.
If the insulation resistance drops below 100 MΩ
the heating cable may be damaged. Stop the pour
immediately. Locate the damage and repair it.
After the embedding
After completion of all concrete works,
perform the resistance tests and record the
values on the Installation Test Record.
Supplementary work
Work such as drain installation, placement of
anchor bolts and cutting of expansion joints
is done after the initial concrete pour. Consult
the drawing of the layout so that damage to the
heating cable is avoided.
It is desirable to monitor the heating cable by
insulation resistance testing during any activity
which could lead to heating cable damage.
After all such work has been completed perform
the resistance tests and record the results on the
Installation Test Record.
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