Constant Wattage Parallel Heat Tracing Cable

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


1. Bus wires
2. Bus Wire Insulation
3. Heating wire
4. Braiding
5. Outer Jacket

Construction Data

Buswire size 2X AWG 18 to AWG 15 Stranded Nickel Plated Copper
Heating elements PTFE
Insulation Nichrome
Braiding Nickel Plated copper Braided
Outjacket PTFE


Maximum Circuit Length(M)

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

Download Catalogue

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
Min.installation temp. -40°C
Cut to Length Yes
Min Bending radius 25 mm
Voltage 230 V / Customise
Insulation Dark Brown