ENGINEERED SOLUTIONS

FOR HEATING & SENSING

Underwriters
ISO 9001-2015 Laboratories

HEAT TRACING SOLUTIONS

MARATHON HEATER (I) PVT. LTD.

188A, B-169 (Part), B-188 & B-189 (A), Road No.-5, M.I.A., Madri, Udaipur, (Rajasthan.) INDIA 313 003
Ph.: +91 294 3507749, Fax: +91 294 3507731, Cell No. : +91 9351159988
E-mail : info@marathonheat.com, akhil@marathonheat.com

www.marathonheat.com
 ENGINEERED SOLUTIONS
FOR HEATING & SENSING

SELF REGULATING HEATING CABLE

Construction LTSRH
1. Bus wires

2. Semi-conductiveself regulatingmatrix

3. Inner Jacket

4. Copper /Nickle plated copper

5. Outer Jacket

1 2 3 4 5

Introduction
Marathon Heaters self regulating heating cable provide the most versatility in heat trace design and applications. Constructed of
a Semi-conductive heater matrix extruded between parallel bus wires, a self regulating cable adjusts its output to independently
respond to ambient temperatures all along its length. As temperatures increase, the heater's resistance increase which lower the
output wattage. Conversely, as the temperature decrease, the resistance decreases and the cable produces more heat. So it is no
need thermostat in some applications. It will never overheat or burnout even when wrapped by itself(overlapped). It can be cut
to any length. So it is a convenient ,easyuse and energy saving product.

Construction Data
Buswire size 0.9 mm2 /1.3mm2 tinned copper/ NPC

Heating elements PTC

Insulation Polyolefin

Cable Specifications
Output wattage at 10°C 10, 15, 25, 30, 35 W/M

Braiding covering area Over 85%

Max. maintain temp @ 10°C 65°C

Max. exposure temp. 85°C

Min.installation temp. -40°C

Bending radius 5 times*cable thickness

Voltage 208-277 V

Insulation color Black

Regular size to insulation 10*4mm (Width*Thickness)

www.marathonheat.com
 ENGINEERED SOLUTIONS
FOR HEATING & SENSING

SELF REGULATING HEATING CABLE

Graph of LTSRH

Max length(m)vs circuit breaker size

AC220V Max circuit length(m) vs CB size

Model Start-up temp.°C 16A 20A 32A

10 78 90 118

0 56 65 82
LTSRH
-20 45 50 59

-40 30 33 41

www.marathonheat.com
 ENGINEERED SOLUTIONS
FOR HEATING & SENSING

SELF REGULATING HEATING CABLE

Construction MTSRH
1. Bus wires

2. Semi-conductiveself regulatingmatrix

3. Inner Jacket

4. Copper /Nickle plated copper

5. Outer Jacket

1 2 3 4 5

Introduction
Marathon Heaters self regulating heating cable provide the most versatility in heat trace design and applications. Constructed of
a Semi-conductive heater matrix extruded between parallel buswires, a self regulating cable adjusts its output to independently
respond to ambient temperatures all along its length. As temperatures increase,the heater's resistance increase which lower the
output wattage. Conversely, as the temperature decrease, the resistance decreases and the cable produces more heat. So it is no
need thermostat in some applications. It will never overheat or burnout even when wrapped by itself(overlapped). It can be cut
to any length. So it is a convenient ,easyuse and energy saving product.

Construction Data
Buswire size 1.3mm2 tinned copper

Heating elements PTC

Insulation Polyolefin or Fluoropolymer

Cable Specifications
Output wattage at 10°C 40, 45, 50, 60 W/M

Braiding covering area Over 85%

Max. maintain temp @ 10°C 105°C

Max. exposure temp. 135°C

Min.installation temp. -40°C

Bending radius 10 times*cable thickness

Voltage 208-277 V

Insulation color Grey

11.8*3.4mm-polyolefin insulation
Regular size to insulation 11.6*3.2 Fluoropolymer insulation
(Width*Thickness)

www.marathonheat.com
 ENGINEERED SOLUTIONS
FOR HEATING & SENSING

SELF REGULATING HEATING CABLE

Graph of MTSRH

Max length(m)vs circuit breaker size

AC220V Max circuit length(m) vs CB size

Model Start-up temp.°C 25A 32A 40A

10 53 69 86

0 46 61 74
MTSRH
-20 41 53 66

-40 36 48 60

www.marathonheat.com
 ENGINEERED SOLUTIONS
FOR HEATING & SENSING

SELF REGULATING HEATING CABLE

Construction HTSRH
1. Bus wires

2. Semi-conductiveself regulatingmatrix

3. Inner Jacket

4. Copper /Nickle plated copper

5. Outer Jacket

1 2 3 4 5

Introduction
Marathon Heaters self regulating heating cable provide the most versatility in heat trace design and applications. Constructed of
a Semi-conductive heater matrix extruded between parallel buswires, a self regulating cable adjusts its output to independently
respond to ambient temperatures all along its length. As temperatures increase,the heater's resistance increase which lower the
output wattage. Conversely, as the temperature decrease, the resistance decreases and the cable produces more heat. So it is no
need thermostat in some applications. It will never overheat or burnout even when wrapped by itself(overlapped). It can be cut
to any length. So it is a convenient,easyuse and energy saving product.

Construction Data
Buswire size 1.5mm2 Nickel Plated Copper
Heating elements Fluoropolymer heating mixture
Insulation Fluoropolymer/FEP
Braiding Tinned copper
Outjacket Fluoropolymer/FEP

Cable Specifications
Output wattage at 10°C 40, 55, 60, 65 W/M
Braiding covering area Over 85%
Max. maintain temp @ 10°C 135°C
Max. exposure temp. 205°C
Min.installation temp. -40°C
Bending radius 10 times*cable thickness
Voltage 110-120/208-277 V
Insulation color Dark Grey
Regular size to insulation 9.8*3.3 mm (Width*Thickness)

www.marathonheat.com
 ENGINEERED SOLUTIONS
FOR HEATING & SENSING

SELF REGULATING HEATING CABLE

Graph of HTSRH

Max length(m)vs circuit breaker size

AC220V Max circuit length(m) vs CB size

Model Start-up temp°C 32A 40A

10 53 66

0 48 60
HTSRH
-20 44 55

-40 39 49

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 ENGINEERED SOLUTIONS
FOR HEATING & SENSING

CONSTANT WATTAGE PARALLEL HEAT TRACE

Construction CWPHT
1. Bus wires

2. Bus Wire Insulation

3. Heating wire

4. Braiding

5. Outer Jacket
1 2 3 4 5

Introduction
Parallel circuit Heating cables are constant watt arrangement designed to put out a certain amount of wattage per linear foot of
cable. These are generally constructed of two #12AWG polymer insulated parallel bus wires with a nickel alloy heating element
wire wrapped alternatively along the insulated bus wires. These connections are made at the 'NODE' point where the nickel-alloy
heating element is either welded or connected by rivets. The entire element assembly is then dielectrically insulated with an
additional polymer jacket. The power output per unit length is constant, regardless of the overall length of the heating unit. The
parallel arrangement preserves systems integrity i.e. if any section of cable should fail, the rest of the heater will continue to
operate. Ideally suited for applications where a particular watt density is required at all times such as freeze protection and many
other low temperature process control applications

Construction Data
Buswire size 2X AWG 18 to AWG 15 Stranded Nickel Plated Copper
Buss Wires Insulation PTFE
Heating Wire Nichrome
Braiding Nickel Plated copper Braided
Outer Jacket PTFE

Cable Specifications
Output wattage at 10°C 20, 30, 40, 50, 60 W/M
Braiding covering area Over 85%
Surface Temperature 200°C
Max. exposure temperature 230°C
Cut to Length Yes
Min Bending radius 25 mm
Voltage 230 V / Customise
Insulation Dark Brown

Maximum Circuit Length(M)

Voltage - 230 VAC
Model Nominal output W/m Circuit Load Max. Circuit Length (Meter)
20 0.086956522 184
30 0.130434783 123
CWPHT 40 0.173913043 115
50 0.217391304 92
60 0.260869565 77

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 ENGINEERED SOLUTIONS
FOR HEATING & SENSING

CONSTANT WATTAGE SERIES HEAT TRACE

Construction CWSHT
1. Heating element

2. Heating element Insulation

3. Inner Jacket

4. Braiding

5. Outer Jacket
1 2 3 4 5

Introduction
Series resistance-type heater cables use single or multiple resistive conductors to create a heating circuit. Power output of these
cables is relatively constant and as voltage is applied, the power output is determined by a combination of the length of the cable
and the overall resistance of the conductor. heating cable's current and resistance is equal to all length heating cable, so the
heating value of each unit is equally, not result in the power of terminal end is lower than beginning end with the increasing
length of heating cable, so it is suit for long line pipes and large diameter pipe's heat tracing or temp. maintenance, the cable can
NOT cut to be length.

Construction Data
Heating element Nichrome / Copper Nickel
Heating element Insulation PTFE
Inner Jacket PTFE
Braiding Tinne Copper Braid
Outer Jacket PTFE

Cable Specifications
Output wattage at 10°C Customize W/M
Braiding covering area Over 85%
Surface Temperature 200°C
Max. exposure temperature 230°C
Maximum Circuit Length 3 KM
Min Bending radius 45 mm
Voltage 230 V / Customise
Insulation Red

Maximum Circuit Length(M)

Voltage - 230 VAC
Model Wattage Conductor Size (mm)2 Resistance 20°C Ohms/m
40 1.3 0.01492
50 2.1 0.009449
CWSHT
60 3.3 0.005945
70 5.3 0.003478

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 ENGINEERED SOLUTIONS
FOR HEATING & SENSING

MINERAL INSULATED HEAT TRACE

Construction MIHT

1. Conductor

2. InsulationMaterial

3. Sheath Material
1 2 3

Introduction
A mineral Insulated (MI) cable essentially consists of one or two conductors of copper or alloy embedded in dielectric magnesium
oxide insulation and surrounded by an Incoloy 825 sheath. These cables are recognized for their high temperature service and
excellent protection against corrosion. Suitable for high temperature and harsh environments. Long circuit lengths and Uniform
power along the entire length

Construction Data Cable Specifications

Alloy 825 / SS of 300X range / Output wattage at 20°C Customise W/M
Sheath Material
Customise
Max. Operating SS: 600°C
Number of
1, 2 & 4 temperature
Conductors Inconel (600): 800°C
(w.r.t. Sheath Material)
Nichrome80/20, Copper, Copper-
Conductor Material Min Bending radius 3D ( D - pipe OD)
Nickel resistance alloy / Customise

Insulation Material MGO Voltage 230 V / Customise

Available Range
Nominal Core
Cable
Sheath Resistance Conductor Nominal Coil
Sr. No. Core Material Diameter (mm)
Material at 20˚C. Ω/Mtr CSA (mm2) Length (Mtr)
(+/- 0.20 mm)
(+/- 10%)
1.1 Nichrome 6.5 mm 0.160 Ω 6.875 mm² 45 Mtr
1.2 Nichrome 5.3 mm 0.250 Ω 4.400 mm² 65 Mtr
1.3 Nichrome 4.7 mm 0.400 Ω 2.750 mm² 75 Mtr
1.4 Nichrome 4.3 mm 0.630 Ω 1.746 mm² 85 Mtr
1.5 Nichrome 3.9 mm 1.000 Ω 1.100 mm² 100 Mtr
SS 316L
1.6 Nichrome 3.6 mm 1.600 Ω 0.688 mm² 120 Mtr
1.7 Nichrome 3.4 mm 2.500 Ω 0.440 mm² 130 Mtr
1.8 Nichrome 3.2 mm 4.000 Ω 0.275 mm² 150 Mtr
1.9 Nichrome 3.2 mm 6.300 Ω 0.175 mm² 150 Mtr
1.10 Nichrome 3.2 mm 10.000 Ω 0.110 mm² 150 Mtr
1.11 Constantan 4.9 mm 0.160 Ω 3.000 mm² 70 Mtr
1.12 Constantan 4.4 mm 0.250 Ω 1.920 mm² 85 Mtr
1.13 Constantan 4.0 mm 0.400 Ω 1.200 mm² 100 Mtr
SS 316L
1.14 Constantan 3.7 mm 0.630 Ω 0.762 mm² 120 Mtr
1.15 Constantan 3.4 mm 1.000 Ω 0.480 mm² 130 Mtr
1.16 Constantan 3.2 mm 1.600 Ω 0.300 mm² 150 Mtr
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 ENGINEERED SOLUTIONS
FOR HEATING & SENSING

MINERAL INSULATED HEAT TRACE

Construction
Nominal Core
Cable
Sheath Resistance Conductor Nominal Coil
Sr. No. Core Material Diameter (mm)
Material at 20˚C. Ω/Mtr CSA (mm2) Length (Mtr)
(+/- 0.20 mm)
(+/- 10%)
1.17 Copper 5.9 mm 0.004 Ω 4.250 mm² 55 Mtr
1.18 Copper 5.3 mm 0.007 Ω 2.429 mm² 60 Mtr
1.19 Copper 4.9 mm 0.011 Ω 1.545 mm² 65 Mtr
1
1.2 2 Copper 4.6 mm 0.017 Ω 1.000 mm² 75 Mtr
SS 316L3
1.21 Copper 3.7 mm 0.025 Ω 0.680 mm² 120 Mtr
1.22 Copper 3.4 mm 0.040 Ω 0.425 mm² 130 Mtr
1.23 Copper 3.2 mm 0.063 Ω 0.270 mm² 150 Mtr
1.24 Copper 3.2 mm 0.098 Ω 0.173 mm² 150 Mtr
2.1 Nichrome 6.5 mm 0.160 Ω 6.875 mm² 40 Mtr
2.2 Nichrome 5.3 mm 0.250 Ω 4.400 mm² 65 Mtr
2.3 Nichrome 4.7 mm 0.400 Ω 2.750 mm² 70 Mtr
2.4 Nichrome 4.3 mm 0.630 Ω 1.746 mm² 80 Mtr
2.5 Nichrome 3.9 mm 1.000 Ω 1.100 mm² 95 Mtr
INCONEL 600
2.6 Nichrome 3.6 mm 1.600 Ω 0.688 mm² 110 Mtr
2.7 Nichrome 3.4 mm 2.500 Ω 0.440 mm² 120 Mtr
Construction Data
2.8 Nichrome 3.2 mm 4.000 Ω 0.275 mm² 140 Mtr
2.9 Nichrome 3.2 mm 6.300 Ω 0.175 mm² 140 Mtr
2.10 Nichrome 3.2 mm 10.000 Ω 0.110 mm² 140 Mtr
3.11 Constantan 4.9 mm 0.160 Ω 3.000 mm² 65 Mtr
3.12 Constantan 4.4 mm 0.250 Ω 1.920 mm² 80 Mtr
3.13 Constantan 4.0 mm 0.400 Ω 1.200 mm² 95 Mtr
INCONEL 600
3.14 Constantan 3.7 mm 0.630 Ω 0.762 mm² 110 Mtr
3.15 Constantan 3.4 mm 1.000 Ω 0.480 mm² 120 Mtr
3.16 Constantan 3.2 mm 1.600 Ω 0.300 mm² 140 Mtr
3.1 Nichrome 6.5 mm 0.160 Ω 6.875 mm² 40 Mtr
3.2 Nichrome 5.3 mm 0.250 Ω 4.400 mm² 65 Mtr
3.3
Maximum Circuit Length(M) Nichrome 4.7 mm 0.400 Ω 2.750 mm² 70 Mtr
3.4 Nichrome 4.3 mm 0.630 Ω 1.746 mm² 80 Mtr
3.5 Nichrome 3.9 mm 1.000 Ω 1.100 mm² 95 Mtr
INCONEL 825
3.6 Nichrome 3.6 mm 1.600 Ω 0.688 mm² 110 Mtr
3.7 Nichrome 3.4 mm 2.500 Ω 0.440 mm² 120 Mtr
3.8 Nichrome 3.2 mm 4.000 Ω 0.275 mm² 140 Mtr
3.9 Nichrome 3.2 mm 6.300 Ω 0.175 mm² 140 Mtr
3.10 Nichrome 3.2 mm 10.000 Ω 0.110 mm² 140 Mtr
3.11 Constantan 4.9 mm 0.160 Ω 3.000 mm² 65 Mtr
3.12 Constantan 4.4 mm 0.250 Ω 1.920 mm² 80 Mtr
3.13 Constantan 4.0 mm 0.400 Ω 1.200 mm² 95 Mtr
INCONEL 825
3.14 Constantan 3.7 mm 0.630 Ω 0.762 mm² 110 Mtr
3.15 Constantan 3.4 mm 1.000 Ω 0.480 mm² 120 Mtr
3.16 Constantan 3.2 mm 1.600 Ω 0.300 mm² 140 Mtr

# Cold Length can be customized based on the requirement.

Dual Side Welded Cold Region MI Cable Welded Cold Region MI Cable Extended Cold Region (ECR) MI Cable

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 ENGINEERED SOLUTIONS
FOR HEATING & SENSING

ACCESSORIES FOR HEATING CABLES

EHT System Accessories

Power
Connection
Box

Insulation
Cable End Seal
Above Insulation

Multiple Entry
Connection

Heating Cable
Cable End Seal
Pipe Strap Below Insulation

Fastening Tape

Fastening Tapes & Clamp Insulation entry kits Junction Boxes

Fastening Tape & Clamp for fixing the Bushings protect against mechanical Junction boxes for connecting heating
heating cable, and for mounting the damage to the heating cable and cable - used for power, connecting and
bracket capillary of the thermostat branching of heating cables.

Termination kits Control Panel Warning Labels

The termination kit contains everything Control panel are complete control Warning labels on the insulation
needed for the completion of the cable solutions for heat trace applications indicating presence of an electric
at both powered and unpowered side. and provides temperature control, heater.
monitoring and power management.

www.marathonheat.com
ENGINEERED SOLUTIONS FOR HEATING & SENSING

MARATHON HEATER (I) PVT. LTD.

188A, B-169 (Part), B-188 & B-189 (A), Road No.-5,
M.I.A., Madri, Udaipur, (Rajasthan.) INDIA 313 003
Ph.: +91 294 3507749, Fax: +91 294 3507731
E-mail: info@marathonheat.com
akhil@marathonheat.com

www.marathonheat.com