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8
Heating cable testing and maintenance
Make sure that gutter and downspouts are free
of leaves and other debris prior to the winter
season.
Using a 2500-Vdc megohmmeter (2500 Vdc
minimum), unplug the Gardian and test the
unit by checking the insulation resistance
between the flat blade and the ground pin in
the plug. Minimum reading should be 1000
Product specifications
Cable length (feet)
Min. power output at 40°F (5°C) on pipe (watts)
Nominal power output in ice and snow (watts)
General specifications for all W51 products
Nominal cable width (in)
Nominal cable thickness (in)
Heating cable bus wire gauge (AWG)
Cold lead length (in)
Voltage rating (V)
Plug rating (amps)
Circuit breaker sizing minimum (amps)
Max. exposure temperature
Electrical classification
Exposure to chemicals
Worldwide Headquarters
Tyco Thermal Controls
300 Constitution Drive
Menlo Park, CA 94025-1164
USA
Tel (800) 545-6258
Fax (800) 527-5703
info@tycothermal.com
www.tycothermal.com
megohms regardless of Gardian length.
Record the original values for each circuit.
Take additional readings during regularly
scheduled maintenance and compare to the
original value. If the readings fall below 1000
megohms, inspect heating cables and
insulation for signs of damage.
W51-6P
6
36
48
0.42
0.22
16
30
110–120
15
15
150°F (65°C)
Nonhazardous areas only
None
Tyco, Gardian and Raychem are trademarks or registered trademarks of Tyco Thermal Controls LLC
or its affiliates.
Canada
Important: All information, including illustrations, is believed to be reliable. Users, however, should
Tyco Thermal Controls
independently evaluate the suitability of each product for their particular application. Tyco Thermal
250 West St.
Controls makes no warranties as to the accuracy or completeness of the information, and disclaims any
Trenton, Ontario
liability regarding its use. Tyco Thermal Controls' only obligations are those in the Tyco Thermal
Controls Standard Terms and Conditions of Sale for this product, and in no case will Tyco Thermal
Canada K8V 5S2
Tel (800) 545-6258
Controls or its distributors be liable for any incidental, indirect, or consequential damages arising
Fax (800) 527-5703
from the sale, resale, use, or misuse of the product. Specifications are subject to change without
notice. In addition, Tyco Thermal Controls reserves the right to make changes—without notification to
Buyer—to processing or materials that do not affect compliance with any applicable specification.
W51-12P
W51-18P
W51-24P
12
18
24
72
108
144
96
144
192
WARNING! Fire and shock hazard.
Damaged heating cable can cause electrical
shock, arcing, and fire. Do not attempt to
repair or energize damaged heating cable.
Remove it at once and replace with a
new length.
W51-50P
W51-75P
50
75
300
450
400
600
W51-100P
100
600
800
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