Installation Guide
12 | nVent.com/RAYCHEM
• Power Limiting technology dictates that the heating cable
can be overlapped only once on to itself. If VPL cables are
installed parallel to each other, please allow for minimum 15
mm clearance.
For VPL heating cable only:
• Fix in place with a minimum of two wraps the appropriate
self-adhesive glass cloth tape (see figure 1) or plastic cable
ties at 300 mm intervals and additionally where necessary.
• Plastic cable ties must have a temperature rating that
matches the system exposure temperature.
• The heating cable’s minimum bend radius must not be
exceeded (refer to p. 6)
Bend the cable only in upright position
• Theheatingcabledoesnotbendeasilyintheflatplane.
Do not force such a bend, as the heating cable may be
damaged.
3.4.1 Straight tracing
• Straight trace the pipe unless the design calls for spiralling
(see 3.4.2).
• On horizontal pipes fix on lower quadrant as shown in Figure
1 and not on bottom of pipe.
• To prevent overheating, be sure the location of the power
limiting heating cable is planned so that the active heating
zonewillnotextendintothecomponent. Readthekit
installation instructions and plan the component location
before permanently attaching the cable to the pipe. Ensure
that the active heating zones are located where heat is
required i.e. on the pipe.
• Thermally insulate and weatherproof to specification.