nVent.com | 7
Step 4.
Attach the heating cable to the
pipe
4A. Prepare to install the heating cable
Begin the installation at the electrical outlet.
Leave at least 1 foot (30 cm) of extra heating
cable so the ground-fault unit can be secured
to the outside of the thermal insulation, as
shown in Figures
1 and 2. This will relieve any strain on the
heating cable or plug. However, be careful not
to leave heating cable hanging in a loose loop
where it could be accidentally snagged and
pulled out.
Make certain you have removed any old
heating tapes and insulation.
Important:
The ground-fault unit and plug
must be kept dry. It is important to include
the drip loop to prevent water from getting
into the ground-fault unit.
Thermal
insulation
Cable ties
or tape
End seal
Outlet
cover
Drip loop
9800
Flexfit
plug
Figure 1. Typical manufactured housing installation
Figure 2. Typical installation
4B. Install the heating cable
Single run method
Run the heating cable in a straight line
approximately a third of the way up from the
bottom of the pipe, as shown in Figure 3.
Frostex 9610
application tape;
1-foot spacing
Figure 3. Single run method
Multiple run method
When two or more runs are required, install
the heating cable in the 4 o’clock and
8 o’clock positions as shown in Figure 4.
When three runs are required, install the
heating cable as shown in Figure 5.
Figure 4. Double runs
Figure 5. Triple runs
4C. Tape the heating cable and end seal to
the pipe
Fasten the heating cable to the pipe at
1-foot (30-cm) intervals, using two or three
thicknesses of 9610 application tape or
equivalent.
Provide extra heat at valves and spigots
by wrapping each with 1 foot (30 cm) of
additional heating cable, overlapping as
required.
If you have excess heating cable at the end
of your pipe, double it back along the pipe
where the insulation will completely cover it
as shown in Figure 6. Using 9610 application
tape or equivalent, tape the end seal to the
pipe as shown in Figures 1, 2, and 6.
Figure 6. Multiple run installation
Important:
In a crock or standpipe, run
the Frostex heating cable down and back up
the pipe (as shown in Figure 6), so that the
end seal is well above the ground level and
will not be sitting in water.
8
4
8
4
12
Pipe
Crock
Ground
level
End seal
Thermal
insulation
Outlet
cover
Drip loop
9800
FlexFit
plug
Cable ties
or tape
