Cable Specifications; Calculating The Current Consumption; Tables - Autronica Autroprime Installation Handbook

Cable Specifications

8. Cable Specifications

8.1 Calculating the Current Consumption

8.2 Tables

8.2.1 Table for Low Current Detectors and I/O units
Detection
Loop
current Max cable
setting resistance
(mA) (ohm)
100 105
150 58
200 35
250 21
Installation Handbook, Autroprime Interactive Fire Detection System, 116-P-APRIME2-INSTAL/DGB, Rev. C, 2016-29-02,
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.
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.
Cable Cable
length (m) length (m)
for for
AWG 20 AWG 18
(0,5mm²) (0,75mm²)
1500 2250
829 1243
500 750
300 450
Autronica Fire and Security AS
Page 18
Cable Cable
length (m) length (m)
for for
AWG 17 AWG 15
(1,0mm²) (1,5mm²)
3000 4500
1657 2486
1000 1500
600 900
Cable
length (m)
for
AWG 13
(2,5mm²)
7500
4143
2500
1500