Cable Types
Loop cables
The cable is an important part of the Senator II fire alarm system, which
carries both communication data and power supplies. Its integrity is
therefore essential for fire detection and alarm signals to be processed to
keep the system operational.
Loop Cable type and Specification
Mineral insulated copper cable (EMC Compliant)
•
BS6207: Part 1
•
fire resistance tested to BS6387 categories CWZ
•
having continuous metal sheath encapsulating
•
2- cores
•
each core having 1.5mm
2
cross section area
•
a red cover sheath (preferred for alarm applications)
•
core to core capacitance 190pF/m
•
core to screen capacitance 220pF/m
Delta Crompton FDZ2E1.5 FireTuf OHLS fire resistant data cable
(EMC Compliant)
•
Two core plus earth wire
•
each core having 1.5mm
2
cross sectional area
•
to BS6387 categories CWZ
•
core to core capacitance 115pF
•
core to screen capacitance 205pF/m
Loop cable
usage
Must not exceed 1Km, this includes the cable usage on main loop and spur
circuits.
NOTE: Multicore cables having more than 2-cores are not allowed for
loop wiring, due to inadequate separation and possible electrical
interference problems.
Cable Types
Loop cables
78910-03NMIssue 2_10/96
4-1
Senator II Installation Manual