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3
Heating Cable Installation
Raychem-IM-H57548-HWATsystem-EN 16/08
• The heating cable must not be embedded directly
in the sealing material; the pipe should have ther-
mal insulation over it (if allowed by local codes) or
the heating cable should be run through the pen-
etration in a tube or conduit. If the conduit must be
sealed, use a pliable fire-resistant material (Dow
Corning Fire Stop, 3M Fire Barrier, or T&B Flame-
Safe) that can be removed if necessary.
Figure 5: Multiple pipe floor penetration
• On vertical piping groups, run the heating cable
along the inside of the pipe close to other pipes so
it will not be damaged if the pipe hits the side of
the floor penetration. Run the heating cable over
the outside of the pipe support. Do not clamp the
heating cable to the pipe with the pipe support.
• In high-rise construction it may be necessary to
install the HWAT System 10 or 12 floors at a time
to fit into the construction schedule. If so, the
end of the heating cable should be sealed with a
RayClic-E end seal and placed in an accessible
location. This allows testing of one part of the
heating cable at a time, and allows splicing it to
another section when the system is complete.
Paying out the cable:
• Use a reel holder that pays out smoothly with little
tension. If the heating cable snags, stop pulling.
• Keep the heating cable strung loosely but close
to the pipe being traced to avoid interference with
supports and equipment.
• Meter marks on the heating cable can be used to
determine cable length.
