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3
Heating Cable Repair
3.3
Joining Design B, D, and E Cables
The instructions following apply to both heated
section-heated section (hot-hot) joints and heated
section-cold lead section (hot-cold) joints. Read
these instructions completely before attempting
to complete the repair or modification and refer to
the Appendices for additional information where
indicated. The instructions that apply specifically to
a hot-hot or hot-cold joint are clearly identified and
must be followed.
factors such as wind as it will cool the joint
temperature making brazing difficult and
disconnect power from the heating cable before
attempting any repairs or modifications to the
heating cable.
Ensure that the portion of the cable being worked
on can be moved away from the surface at least 6
in (15 cm) to allow access when brazing (see repair
jig in Appendix H).
Expose heated section and/or cold lead section so
that 12 in (30 cm) minimum on either side of the
joint or failure point is accessible.
If replacing an old joint, heat the bell-mouth (strain
relief fitting on heating cable end of joint) with the
torch and use pliers to separate it from the joint. Use
a hacksaw to remove old joint from cable.
Figure 10: Remove joint
14 | nVent.com
Note: Shield work area from environmental
Bell-
mouth
Joint
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