Protec 6100 - 6100 Fire Alarm Indications; General Fire Indicator; Zone Fire Indicator; 6100 Fault Notifications

N93-572-88 Issue 12 NH Page 11 of 52 © Protec Fire Detection plc 2020
Table 4.0 shows the general characteristics required for the loop cabling.
Table 4.0 General loop cable requirements
Recommended Cable Type
Twin core twisted pair or twin core screened ( screen must
be connected to earth ). Four core cable must not be
used.
Recommended Cable Size
1.0mm
2
to 2.5mm
2
Maximum Cable Resistance
16Ω per conductor ( dependent on loop volt drop
calculations )
Maximum Cable Capacitance
0.22µF ( 220nF ) per km between conductors
Maximum Cable Distance
1.5km ( dependent on loop volt drop calculations )
Table 4.1 Guide to required cable size vs average loop current
Loop Length ( meters )
500
550
600
650
700
750
800
850
900
950
1000
Total
loop
load
in
alarm
(mA)
50
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.5
1.5
1.5
1.5
100
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.5
1.5
1.5
1.5
150
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.5
1.5
1.5
1.5
200
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.5
1.5
1.5
1.5
250
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.5
1.5
1.5
1.5
300
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.5
1.5
1.5
1.5
350
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.5
1.5
1.5
1.5
400
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.5
1.5
1.5
1.5
450
1.0
1.0
1.0
1.0
1.0
1.5
1.5
1.5
1.5
1.5
1.5
500
1.0
1.0
1.0
1.0
1.5
1.5
1.5
1.5
1.5
1.5
2.5
550
1.0
1.0
1.0
1.5
1.5
1.5
1.5
1.5
1.5
2.5
2.5
600
1.0
1.0
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
Loop Length ( meters )
1000
1050
1100
1150
1200
1250
1300
1350
1400
1450
1500
Total
loop
load
in
alarm
(mA)
50
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
100
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
150
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
200
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
250
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
300
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
350
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
400
1.5
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
450
1.5
1.5
1.5
1.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
500
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
N/A
550
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
N/A
600
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
N/A
N/A
N/A