52 | nVent.com
nVent.com | 53
Appendix D:
Drying Out Procedure
7
Gradually move the flame toward the joint, while
maintaining the short sweeping motion of the torch. When
initially checking insulation resistance after the damaged
joint or end cap has been removed, continue the sweeping
motion of the torch past the end of the cable. When heating
out the cable prior to brazing the joint or end cap to the
cable sheath, stop the sweeping motion of the torch 1/2 in
(13 mm) from the joint or end cap (Figure D2). If you heat
toward the end of the cable too quickly, you may skip over
the moisture and drive it further back into the cable.
Figure 69: Sweep flame to end of cable
On completion, check IR with a 500V insulation tester
(Megohmmeter). Test between the tails/conductors
and the sheath, and between the tails/conductors for
2-conductor cables.
WARNING: When drying out cable, care
must be taken not to trap moisture as this could
cause the cable to burst, possibly causing injury.
2 in (50 mm)
Stop here
Breather hole
1/2 in.
(13 mm)
