Page 1
EasyHeat™ SR Trace™ Cable
Reduced
Output
Minimal
Output
WARM PIPE
COLD PIPE
High
Output
Roof and Gutter De-Icing, Self-Regulating, Cut-to-Length. For Residential and Commercial
Applications.
Product Overview
• SR Trace™ cable prevents costly damage to roofs caused by ice
formation and snow accumulation in gutters, downspouts, and
roof valleys.
• The self-regulating heating cable automatically varies its heat
output as the surrounding temperature changes.
Applications
• Suitable for use on asphalt or wood shingles, metal roong or
“membrane” type roong.
• Downspouts that freeze and clog.
Features
• Available for 120 and 240 Vac applications.
— 240 Vac can be used for 208 or 277 Vac applications.
• Power densities of 3, 5, and 8 Watts per foot (0.30 m) at +50°F
(+10 °C ).
• Available in cut-to-order lengths, convenient 250 ft
(76.20 m) self dispensing reel boxes and 750 ft (228.6 m)
master supply reels.
• Manufactured with a waterproof TPE outer jacket.
• Can be installed in dry or wet environments.
• Can be wrapped over itself (overlapped) minimizing the risk of
damaging temperature-sensitive roof coating.
• One year limited warranty.
Related Products
• It is recommended that heating cables for roof and gutter
deicing utilize controls that sense the presence of moisture
and cold-temperature to optimize energy consumption. See
EasyHeat
™
Roof and Gutter De-Icing Controls.
Accessories
• We offer specially designed kits that ease installation and
connection of SR Trace
Connection Kits and Accessories.
™
products. See EasyHeat™ SR Trace™
Certifications
• UL Listed to US and Canadian Safety Standards and CSA
Certied.
Notes
• Per NEC and CEC requirements ALWAYS use a ground fault protection device (GFEP)
to reduce the danger of re from a damaged or improperly installed heating cable.
Electrical fault currents caused by damaged or improperly installed cable MAY NOT
BE LARGE ENOUGH to trip a conventional circuit breaker.
• Heating cables must be installed in compliance with all national, state/provincial and
local codes. Check with your local electrical inspector for specic details.
• Do not twist the bus wires together at either end of the cable.
• All electrical connections in the system should be sealed against moisture.
• Do not expose heating cables to temperatures above their maximum ratings.
• Immediately replace any damaged heating cable or components.
• Classied areas (explosive dust or gas) require the use of special electrical
components.
ROOF AND GUTTER DE-ICING
Illustrated Features
A special self-regulating core is at the center of the SR Trace™ cable. This core is conductive and adjusts according to the surrounding
temperatures. When it is cold, the cable’s core has many conductive paths that generate enough heat to keep the water owing from the
roof to the ground. As the surrounding temperature warms, there are fewer conductive paths and less heat is generated.
Copper Ground
Braid
Moisture and UV
Resistant Polyolifin
Over Jacket
Visit our website at www.emerson.com or contact us at (800) 621-1506.
© October 2020
Irradiated Self-Regulating
Heating Core Material
TPE Inner Jacket
Tinned
Copper
Bus Wires
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Page 2
EasyHeat™ SR Trace™ Cable
Roof and Gutter De-Icing, Self-Regulating, Cut-to-Length. For Residential and Commercial
Applications.
Performance Information
Performance and Rating Data
Catalog Number SR51J SR52J
Voltage (Vac) 120 208 240 277
Nominal Power Output in Ice (W/ft) 8.0 7.0 8.0 10.0
Nominal Power Output @ +50°F (+10°C) 5.0 5.0
Maximum Single Cable Length ft (m) 191 (58.2) 116.1 (381)
Minimum Installation Temperature°F (°C) -40 (-40) -40 (-40)
Current Load (Amp/ft)
at 0°F (-20°C) start-up 0.132 0.066
at -20°F (-30°C) start-up 0.147 0.073
Maximum Cable Length per Circuit in ft (m)
Breaker Size SR51J SR52J
Start-up Temperature +20°F (-6°C) 0°F (-20°C) -20°F (-30°C) +20°F (-6°C) 0°F (-20°C) -20°F (-30°C)
15 Amp Breaker 125 (38.1) 115 (35.1) 100 (30.5) 250 (76.2) 225 (68.6) 205 (62.5)
20 Amp Breaker 170 (51.8) 150 (45.7) 135 (41.1) 335 (102.1) 300 (91.4) 270 (82.3)
30 Amp Breaker 250 (76.2) 225 (68.6) 205 (62.5) 500 (152.4) 455 (138.7) 405 (123.4)
ROOF AND GUTTER DE-ICING
56
Visit our website at www.emerson.com or contact us at (800) 621-1506.
© October 2020
Page 3
EasyHeat™ SR Trace™ Cable
Roof and Gutter De-Icing, Self-Regulating, Cut-to-Length. For Commercial and Residential
Applications.
How To Determine The Length of Cable You Need
The total heating cable length for de-icing is determined by including all elements of the roof system that need protection. Use the
following charts to determine the total length of cable.
Step 1: Measure the roof length and enter it in “1” in the Cable Length Calculation Chart, Table 3.
Step 2: Measure the overhang (shown in Figure 1) and determine the length multiplier for the type of roof, Table 2. Note: If the exact
overhang is not listed, use the next larger size available in the chart.
Step 3: Enter the number of dormers and the length of cable required to go up, over and down in “2” of Table 3.
Step 4: Count the number of valleys and enter that number in “3” of Table 3.
Step 5: Measure the length of the gutters and enter that length in “4” of Table 3. Note: this length will usually be the same as the roof length.
Step 6: Count the number of downspouts and enter that in the rst blank of “5” of Table 3.
Step 7: Measure the height of the downspouts. Multiply that number by 2 for the length of the cable required to go down into downspout
and back up to the gutter. Enter that number in the second blank of “5” of Table 3.
Step 8: Determine the amount of cable needed for each type of roof feature by multiplying the two numbers on each line together and
enter those numbers on the chart.
Step 9: Sum the amount of cable needed for each type of roof feature to determine the total cable length. If this length exceeds the
maximum circuit length of the cable, multiple runs will be needed. Although SR cable is cut to length, the amount of cable needed
can be lengthened or shortened by increasing or decreasing the loop height.
Table 1: Cable Length Requirements Summary
Cable Length
Item
Roof Edge From Table 2
Dormer
Perimeter
Roof Valley 6 ft minimum Per valley (3 ft loop)
Gutter 1 ft per ft 1 Trace/6 in of gutter width
Downspout 2 ft per ft Cable is looped down and back
Table 2: Cable Length Factors vs. Roof Overhang
Eave
Overhang
“O”
12 in 18 in 1.9 2.5
24 in 30 in 2.7 3.5
36 in 42 in 3.6 4.5
48 in 54 in 4.6 5.5
Cable length required = Length Factor x Roof Length
Notes:
Standard shingle roof.
Metal roof with two foot loop spacing.
Cable length calculated above does not include cable for gutter or
downspout. For other designs, contact your local EasyHeat™ sales
representative.
Required (ft) Comment
Select from cable length
required
1 ft per ft
Loop
Height
“H” = “O+6”
1 ft of cable/ft of dormer
perimeter
Length (ft)
Factor Shingle
Roof
Multiplier
Length (ft)
Factor Metal
Roof
Loop Height
Figure 1
Table 3 Cable Length Calculation Chart
1 Roof
2 Dormers
3 Valleys
4 Gutters
5 Downspouts
___________ x _________________
Length Multiplier
___________ x _________________
Number of up, over and down
___________ x _________________
Number of 3 ft up and 3 ft down
___________ x _________________
Length 1 ft cable/1 ft gutter
___________ x _________________
Number of 2x height, up and down
Total Cable Length = __________
6 ft
1 ft
ROOF AND GUTTER DE-ICING
= __________
= __________
= __________
= __________
= __________
Sum of 1 – 5
Visit our website at www.emerson.com or contact us at (800) 621-1506.
© October 2020
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Page 4
EasyHeat™ SR Trace™ Cable
Roof and Gutter De-Icing, Self-Regulating, Cut-to-Length. For Commercial and Residential
Applications.
Product Selection
Carton
Catalog Number Description
SR51J 5 Watts per foot (0.30 m), 120 Vac, cut-to-order 1 0.057 (0.026) per foot 01362700877
SR51J250 250 ft (76.20 m) self-dispensing reel 1 20 (9.1) 01362706921
SR51J750 750 ft (228.60 m) self-dispensing reel 1 72 (32.7) 01362706922
SR52J 5 Watts per foot (0.30 m), 240 Vac, cut-to-order 1 0.057 (0.026) per foot 01362701021
SR52J250 250 ft (76.20 m) self-dispensing reel 1 20 (9.1) 01362706919
SR52J750 750 ft (228.60 m) self-dispensing reel 1 72 (32.7) 01362706920
Quantity
Carton Weight
lb (kg) UPC
ROOF AND GUTTER DE-ICING
58
Visit our website at www.emerson.com or contact us at (800) 621-1506.
© October 2020
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