Appendix A: ZP wiring guide
130
ZP3 Fire Control Panel Installation, Commissioning, and Maintenance Manual
ZP systems operate on 24 VDC. The majority of field wiring consists of power
supply wiring, for devices that require 24 V, or switched, low voltage DC circuits.
These are used for functions such as audible alarm sounders, mimic panels,
magnetic door holders, CO2, water mist or Halon extinguishing systems, and
control of building systems such as evacuation systems, air conditioning,
dampers, and lifts and elevators.
Wiring specifications depend entirely on the current consumption of the devices
connected, the number of devices on the same line, and the distance of each
device from the control unit.
Any type of cable may be used for DC control circuits. Normally, PVC insulated,
single-core or multiple-core cable is used. It is not necessary to shield these
cables.
See Table 39. Conductor diameters of 0.5 mm² to 2.5 mm² may be used. Cables
should be sized so that a maximum volt drop of 1.0 V occurs at the furthest
device when the circuit is operated at maximum power consumption.
&
"
#
1
"
+
.
0
,
-
1
)
(
"
+
.
/
0
!
0.5
250
125
50
N/A
N/A
0.75
375
180
75
N/A
N/A
1.0
500
250
100
50
N/A
1.5
750
375
150
75
35
2.5
1250
625
250
125
60
[1] Length of two-core cable giving a 1 V drop
Summary of Contents for ZP3
Page 163: ......
