Instruction Manual

2 | nVent.com/RAYCHEM
General requirements for pipe freeze protection:
• FrostGuard heating cables may be used on metal and plastic
water pipes but not on exible vinyl tubing (such as garden
hoses).
• FrostGuard heating cables are not intended for use inside any
pipes, for freeze protection of liquids other than water, or for
use in classied hazardous locations.
• Install with a minimum of 1/2” re-resistant, waterproof
thermal insulation.
• Never use on any pipes that may exceed 150°F (65°C).
• Do not use an extension cord.
General instructions:
• Install only in accessible locations; do not install behind walls
or where the cable would be hidden.
• Do not run the heating cable through walls, ceilings, or oors.
• Connect only to ground-fault protected outlets that have been
installed in accordance with all prevailing national and local
codes and standards and are protected from rain and other
water.
FrostGuard 120 V (FG1) heating cable selection for pipe freeze protection:
Use the tables to below to select the correct heating cable. Add
1 foot to your pipe length for each valve or spigot on your pipe
system.
The charts assume the lowest outside temperature is 0°F
(–18°C), with a minimum of 1/2” thick waterproof, re-resistant
thermal insulation (preformed foam). For protection to –20°F
(–29°C), use 1” thick insulation.
Important: All thermal and design information provided here is
based upon a “standard installation”: heating cable fastened to a
pipe and thermally insulated. For any other method of installation
or application, consult nVent at [phone].
Table 1. Metal Pipes
Table 2. Plastic Pipes
Add 1 foot to your pipe length for each valve or spigot on your pipe system. If cable selected is longer than the pipe,
spiral it evenly along the entire pipe.
Pipe diameter (in)
2 1/2
2
1 1/2
1
1/2
Pipe diameter (in)
2 1/2
2
1 1/2
1
1/2
FG1-6P FG1-12P FG1-18P FG1-24P FG1-36P FG1-50P FG1-75P FG1-100P
FG1-6P FG1-12P FG1-18P FG1-24P FG1-36P FG1-50P FG1-75P FG1-100P
Pipe length (ft)
Pipe length (ft)
10
20 30 40 50 60 70 80 90 1000
10 20 30 40 50 60 70 80 90 1000
Pipe Freeze Protection
Electrical codes
Articles 422 and 427 of the National Electrical Code (NEC), and
Part 1, Section 62 of the Canadian Electrical Code (CEC), govern
the installation of FrostGuard heating cable for pipe freeze pro-
tection and must be followed.
Important: For the nVent warranty to be valid, you must comply
with all the requirements outlined in these guidelines.
All thermal and design information provided here is based upon
a “standard” installation with heating cable fastened to an insu-
lated pipe. For any other application or method of installation,
consult nVent at [phone]