nVent RAYCHEM EM4-CW Manuel D'installation page 14

Note: At the bend, the heating cable will stand
on its edge. This is perfectly normal and will
not effect the performance of the system.
Use a spacer to ensure constant spacing
of the heating cable
Laying spacing as given
Minimum 80 mm
Heating cable
14 | nVent.com
Cable installation;
Flat or on edge
in straight runs
On edge
through bends
Spacer
(plastic strip)
Installation of conduit
The conduit for the cold cable should be arranged
such that the connection between heating cable
and cold cable is fully embedded in the slab.
For mechanical protection, the cold lead should
be protected by an appropriate conduit.