nVent.com | 11
2.3 Installation of cables and sensors
nVent insists on the use of a 30 mA residual current device and
a C-characteristic circuit breaker to provide maximum safety and
protection from fire.
2.3.1 Wiring diagrams
There are three wiring diagrams: C, D and E (see 5.5 Diagrams).
For connection of a single unit: Diagram
C
pag. 31
F1: Circuit breaker 20 A max. (C-Characteristic).
F2: Residual current device 30 mA.
For multiple unit connection on one phase system:
Diagram
D
pag. 32
F1, F3, F5: Circuit breaker 20 A max. (C-Characteristic).
F2, F4, F6: Residual current device 30 mA
For multiple unit connection on a three phase system:
Diagram
E
pag. 32
F1: Circuit breaker 3 x 20 A max. (C-Characteristic)
F2: Residual current device 3 x 30 mA
Double-pole electrical protection might be needed to comply with local
electrical standards.
2.3.2 Minimum power cable sizing
Fig. 2
C - Characteristic circuit breaker
10A
13A
16A
20A
Minimum
cable size
3 x 1,5 mm² 3 x 1,5 mm² 3 x 1,5 mm² 3 x 2,5 mm²
Use solid core wires for 1,5 mm² diameters.
Ensure that the installation is compatible with applicable local electrical
requirements.
Warning: As over voltage protection (e.g. in case of thunderstorm) we
recommend the use of an external over voltage protection device.
2.3.3 Heating cable
Fig. 3
Achievable
temperature
Heating cable
Ambient temperature
10°C
15°C
20°C
25°C
HWAT-L (Yellow)
37 - 44˚C
37 - 46˚C
37 - 50˚C 37 - 52˚C
HWAT-M (Orange) 37 - 50˚C
37 - 52˚C
37 - 56˚C 37 - 58˚C
HWAT-R (Red)
37 - 64˚C
37 - 66˚C
37 - 68˚C 37 - 70˚C
Summary of Contents for Raychem HWAT-ECO V4
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