Cable Specifications
Installation Handbook, Autroprime Interactive Fire Detection System, 116-P-APRIME2-INSTAL/DGB, Rev. C, 2016-29-02,
Autronica Fire and Security AS
Page 18
8. Cable Specifications
8.1 Calculating the Current Consumption
NOTE:
As a general rule, the maximum current consumption for all loop
units on a detection loop must not exceed the configured current
consumption.
In the system service menu (Unit Configuration/Detection Loops) it
is possible to limit the maximum possible current consumption for a
selected detection loop. The following different default settings are
possible: 100mA, 150mA, 200mA, 250mA, 300mA, 350mA and
400mA.
The current consumption per device is found in the data sheets of
the respective units.
Always calculate for worst case, normally during alarm condition
whene LEDs, sounders, strobes are activated.
8.2 Tables
The tables in this chapter give the wire dimension in square
millimeters or AWG (American Wire Gauge) for various cable
lengths. Please refer to national/local standards for your country.
Data may change. Please check with your local manufacturer.
If multi-stranded cables are used, cable crimps shall be used.
8.2.1 Table for Low Current Detectors and I/O units
Detection
Loop
current
setting
(mA)
Max cable
resistance
(ohm)
Cable
length (m)
for
AWG 20
(0,5mm²)
Cable
length (m)
for
AWG 18
(0,75mm²)
Cable
length (m)
for
AWG 17
(1,0mm²)
Cable
length (m)
for
AWG 15
(1,5mm²)
Cable
length (m)
for
AWG 13
(2,5mm²)
100 105 1500 2250 3000 4500 7500
150 58 829 1243 1657 2486 4143
200 35 500 750 1000 1500 2500
250 21 300 450 600 900 1500
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