Cable Terminations; Quality Of Cable And Of Cable Installation - Zircon EN54 Installation & Configuration Manual

EN54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
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For a definition of 'Standard' and 'Enhanced'
cable requirements and their different
applications, refer to BS 5839-1, Section 26.
Enhanced cable is typically required for spur
sounder outputs while standard cables may
be adequate for other fire-related I/O,
provided there is diverse cable routing.
3.1.1

Cable Terminations

This section provides guidance on where to bring cables
into the back box for ease of termination.
a. The mains supply should be brought into the control
panel such that the live (L) and neutral (N) cable path
to the mains termination block (MTB) is kept as short
as possible. Refer to Section 6.4 Powering the
Panel for the recommended method of terminating
the mains wiring and safety earth. This must be done
before terminating all other panel wiring.
b. All zone and ancillary cable terminations should be
brought into the panel at suitable positions and routed
tidily between entry and termination points.
The drawing below shows recommended points of entry
so that the following cabling can meet these
requirements.
a. Mains supply cable
b. Zone circuits: 1- 2, 1- 4 or 1- 8
c. Sounder circuits
d. Digital input circuits
e. Auxiliary output circuit
f. 2-way relay PCB outputs (optional)
g. 8-way relay PCB(s) outputs* (optional)
* With 8 Zone panels it may be necessary to use multi-
core cables for these relay outputs.
3.2

Quality of Cable and of Cable Installation

It is important that good quality cable is used, and that
correct installation techniques are followed. In general,
the following cable installation requirements must be met:
a. All cable sections must be circular to allow effective
cable clamping using the cable glands.
b. The cable must be screened (sheathed) to provide
protection against Radio Frequency Interference
(RFI) and the screen must be connected to the
earthing point in the back box (refer to Section 3.1).
c. The screen must be continuous.
d. Cable recommended for use is MICC with a LSF PVC
overcovering, a fire resilient cable to BS7629 or PVC/
SWA/PVC to BS6387.
Recommended Cables:
Cables should not exceed 40R resistance per core and
300nF core-to-core capacitance. This will correspond
to approximately 1km cable length. The following is a
list of recommended cables:
Manufacturer Product Name
AEI MICC
AEI Firetec
Draka FiretufPlus
Draka Firetuf
Pirelli FP Plus
Pirelli FP200 Gold
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Part Number Type
2L1.5 Enhanced
298-052 Standard
FTPLUS2E1.5RD Enhanced
FTZ 2E1.5 Standard
FP Plus 2x1.5 Red Enhanced
FP200 Gold 2x1.5 Red Standard
997-532-000-1, Issue 1
March 2006
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