2
CONSTRUCTION OF ROOF & GUTTER DE-CING CABLES
Description/ Construction of the Cables........................2
Sizing Guide...................................................................2
Inspection......................................................................2
Warning ........................................................................3
Design............................................................................3
Before Installation........................................................4
Service...........................................................................5
Control of Roof & Gutter Cable.....................................5
Drawing Your Plan........................................................6
Installation..................................................................7-8
Accessories....................................................................9
Warranty.......................................................................10
Length (ft)
Heating Cables
Wattage per Linear
Foot @ 50
°
F
Wattage per Linear
Foot @ 32
°
F
120V
250' or 1000’
NAMSR-5W-120
5
7
240V
250’ or 1000’
NAMSR-5W-240
5
7
Self
-R
egula
ting Kits
120V
6
NAMSRK-6FT with plug
5
7
12
NAMSRK-12FT with plug
5
7
18
NAMSRK-18FT with plug
5
7
24
NAMSRK-24FT with plug
5
7
50
NAMSRK-50FT with plug
5
7
75
NAMSRK-75FT with plug
5
7
100
NAMSRK-100FT with plug
5
7
INSPECTION
1. Open package and visually check for breaks or nicks in the cable jacket. File claim with carrier if any damage
is found.
2. Never energize the cable when it’s coiled or on a reel. Test only when it is laid out straight.
3. After removing the cable from the carton or wrapping, check the insulation resistance of the unit from buss
wires to braid with a 2500VDC megger to assure the cables have not been damaged during shipping and
handling.
ELECTRIC SHOCK HAZARD. Verify insulation resistance is 20 megohms or greater before installing.
Contact Warmup if cable is less than 20 megohm.
SIZING GUIDE
Service voltage
110-120V, 220-277V
Normal cable width (in/mm)
0.42 (10.6)
Normal cable thickness (in/mm)
0.23 (5.8)
Cable bus wire gauge (AWG)
16
Cold lead length (in/mm)
35 (900)
Min. Circuit breaker size (Amps)
15
Max. Exposure Temperature
185
°F
(85
°C
)
DESCRIPTION
Warmup NAMSR cables are intended for use on
all types of roofs, including rubber, metal, clay
and asphalt shingles.
They are available in pre-terminated plug-
in kits (NAMSRK) or available for purchase in
various spool lengths and terminated on-site
(NAMSR). The kits are provided in 6, 12, 18, 24,
50, 75 and 100 foot lengths which include a
factory sealed power connection with 30 inch
power cord and plug and a factory sealed end
termination.
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