3
Heating Cable Repair
28 | nVent.com
nVent.com | 29
While joint is still hot, use syringe to fill the joint with
magnesium oxide powder. Use an engraving tool or
other vibration method to pack the powder. If using
an engraving tool, reverse the engraving bit so that the
blunt end is visible and place the bit against the joint.
Using an engraving tool or other vibration method will
evenly distribute the powder and ensure that it is well
packed.
Figure 33: Fill joint with powder
CAUTION: Joint will be hot. Do not touch joint or
cable with bare hands.
Remove syringe and use 1-1/2 in (3.8 cm) long
packing rod (supplied with kit) to pack powder, tak-
ing care not to push in more than 1/8 in (3 mm)
so as not to bend the conductors inside the joint.
If required, add more powder to fill joint and repeat
packing procedure using both the vibrating tool and
the packing rod until the joint is completely full.
Packing
rod
Figure 34: Pack powder