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nVent.com | 57
Hot-cold joint:
Move 3/8 in (9 mm) dia. x 6.9 in (18 cm) long piece
of heat shrinkable tubing (previously installed) for-
ward to completely cover bare heating cable sheath.
Cover the bare cold lead with the 1/2 in (13 mm)
tubing (previously installed). Using heat gun, shrink
the tubing over the exposed copper cable by apply-
ing heat from the center, then outwards to the ends
(see Figure F1).
Slide 3/4 in (19 mm) dia. x 6.9 in (18 cm) long piece
of heat shrink forward and center over joint; heat
shrink should overlap both ends of joint equally.
Using heat gun, shrink the tubing over the joint by
applying heat from the center, then outwards to the
ends. Figure F2 shows the completed joint.
Figure 73: Heat shrink over exposed copper cable
and 1/2 in joint
Figure 74: Completed joint with heat shrink seal
3/4 in (19 mm) dia. x
6.9 in (18 cm)
long heat shrink
3/8 in (9 mm) dia. x
6.9 in (18 cm)
long heat shrink
3/8 in (9 mm) dia. x
6.9 in (18 cm)
long heat shrink
9
Appendix F: Heat Shrink
Tubing Installation for
Polymer Jacketed Cables