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Siemens Building Technologies Installation guide CA2Z3884en
Building Automation 08.2001
5 Cables for AC 24 V triac outputs
and AC 24 V supply
The following applies to the cables of devices such as valves, damper actuators and
contactors connected to the triac outputs of the room controller:
Use twisted, 2-core or multi-core round cable without a screen (standard installation
cable)
Single conductors must not be used
The conductors may be routed together with mains cables (AC 230 V), but they
MUST be insulated from the mains in accordance with regulations and in compliance
with SELV requirements.
These conductors must
NOT
be run in the same cable as mains conductors
For max. cable lengths, see the table below
Cable type A
Diameter
R
Cable length L
max
[m]
VDE / DIN AWG [mm
2
] [mm] [/km] 8.5 VA 9.5 VA 13 VA 20 VA 40 VA 60 VA 80 VA 100 VA 120 VA
10 5.26 2.59 3.8 420 - 280 180 90 60 45 36 30
YSLY 4.00 2.26 5.0 320 - 210 138 69 46 34 28 23
12 3.10 2.05 6.3 250 - 165 108 52 36 26 21 18
YSLY 2.50 1.80 8.0 200 167 130 86 43 29 22 17 14
14 1.95 1.62 11 160 130 100 68 34 22 17 13 11
LiYYP 1.50 1.40 14 120 100 80 52 26 17 13 10 8.5
16 1.23 1.30 16 100 82 65 42 21 14 10 8.5 7.0
LiYYP 1.00 1.15 20 80 67 53 34 17 11.5 8.6 6.9 5.5
18 0.96 1.02 21 78 64 51 33 16 11.0 8.3 6.6 5.5
LiYYP 0.75 0.98 26 61 50 40 26 13 8.6 6.5 5.2 4.3
20 0.56 0.81 33 45 37 30 20 10 6.4 4.8 3.8 -
LiYYP 0.50 0.80 39 40 33 26 17 8.5 5.8 4.3 - -
22 0.34 0.64 56 28 23 18 12 5.8 3.9 - - -
LiYYP
(G51/G87)
0.28 0.60 64 22 19 15 9.7 4.8 - - - -
LiYYP 0.25 0.57 77 20 - 13 8.6 - - - - -
24 0.22 0.51 85 18 - 11.5 7.6 - - - - -
26 0.15 0.40 130 12 - 8.0 5.2 - - - - -
LiYYP 0.14 0.39 138 11 - 7.5 - - - - - -
6


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