1. Sheath in PVC + Halar (140°C)
  2. Sheath in PVC
  3. Metallic screen
  4. Earth-wire
  5. Return-wire
  6. Conductor with insulation

Area of use

  • Ground heating – Non-slippery walk- and drive ways.

Cable data

Electric field strength not measurable cable < 3 Vm
Magnetic field strength not measurable cable < 0.06 micro Tessla

Basic type 90 CM acc. to IEC800
Tested and approved by SEMKO (Sweden) • SETI (Finnland) • NEMKO (Norway)
Meet requirements from VDE (Germany) • BS (England) • DEMKO (Denmark)
Rated voltage 440 V
Sheath temperature (Tm) max +90°C
Dimensioning temperature max +90°C
Installation temperature: min -10°C
Bending radius min 45 mm
Dimension 6.5 ± 0.5 mm
Weight 100 kg/1000m
Table 1: Resistance value

Type of cable
12.00 0.04 18812RH*
8.00 0.15 18800RH*
4.00 0.40 18400RH*
2.90 0.40 18290RH*
1.90 0.40 18190RH*
1.30 0.14 18130RH*
1.00 0.14 18100RH*
0.82 0.14 18082RH*
0.65 0.14 18065RH*
0.45 0.25 18045RH*
0.36 0.25 18036RH*
0.25 0.40 18025RH*
0.18 0.70 18018RH*

* No stock-item

Sheath temperature/Dimensions

Sheath temperature

The sheath temperature (Tm) of the cable will vary depending on the process (ambient) temperature (Tp), load (Q) and way of installation.

The sheath temperature is calculated as follows:

Tm = Q / Ua + Tp

Tm = Sheath temperature °C
Tp = Process temperature in °C
Q = Load in W/m
Ua = Heat transfer coefficience


Velox TCP/R mounted without dissipation of heat with an ambient temperature of 25°C, loaded with 20 W/m will have a sheath temperature of 65°C

Installation in asphalt

Asphalt: max. load 30 W/m cable.

Sheath temperature: diagramm 1

Cable installed free in air or against heat conducting material (Ua = 0.45)


Dissipation of heat

The heat transfer coefficient (Ua) can be improved considerably (3 to 10 times) by arranging some dissipation of heat, for instance by proating the cable with aluminium tape.

For this kind of installation please consult VärmeKabelTeknik for assistance with the design and installation.