Cable lengths table
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10
Maintaining the cable functions
According to valid national regulations.
The cable network for smoke ventilation
systems („Cable system“) ends at the interface (junction box) for the
actuator!
The flexible, heat resistant connection cable of the smoke ventilation system actuator is part of the system
component ‚electric motor actuation' and does not belong to the electrical installation!
We recommend in all cases to discuss the type of cable routing with the competent fire fighting
authorities.
Cable length table
For determining the maximum permissible cable lengths between the smoke control unit and the actuators,
taking into account the specified cables cross sections, please refer to the following table:
Maximum motor current:
4A
(
Note:
Be aware of the overall capacity of the smoke control unit!)
Maximum cable length: (always routed from the central smoke control unit to the last junction box)
Actuating current: Sum of all motor currents per group module
Note:
Do not use the green/yellow wire!
Per motor supply line, 3 wires are required ( 2 wires current carrying /1 wire for monitoring )
Cross section
3 wire
5 wire
3 wire
5 wire
3 wire
1,5 mm²
1,5 mm²
2,5 mm²
2,5 mm²
4 mm²
Actuator current
in Amps
(2 wires in
parallel)
(2 wires in
parallel)
1
84,00 m
168,00 m
140,00 m
280,00 m
224,00 m
2
42,00 m
84,00 m
70,00 m
140,00 m
112,00 m
3
28,00 m
56,00 m
46,67 m
93,33 m
74,67 m
4
21,00 m
42,00 m
35,00 m
70,00 m
56,00 m
(The information is valid for ambient temperatures of 25°C)
Formula for the calculation of the maximum cable length
Permissible max. voltage drop in the line UL : 2 Volt
max. cable length = permissible voltage drop(
UL
) x conductivity of copper(
56
) x cable cross section(
A
)
max. actuator current total (
I
) in amps
x 2
Permissible cable length for the break glass unit supply cable when using......4x2x0.8mm:
up to 200m
The motor connection cable length to the junction box (or control module) must not exceed
10 m
.
