13
General
• Fire Alarm Control Panels should be installed at a location appropriate for staff and fire fighters
• All mains supply isolators must be double pole and suitably marked
• All joints to be fire resisting, junction boxes to be labelled ‘FIRE ALARM’.
• All cables to be fire resisting with a minimum cross-sectional area of 1mm
2
.
• Cable using trunking as a means of containment must be clipped using fire resistant supports WITHIN THE
TRUNKING.
• Zone charts should be fitted in all appropriate locations (adjacent to control equipment and repeaters).
2.1.1 CABLE TYPES & LIMITATIONS
To comply with EMC (Electro Magnetic Compatibility) regulations and to reduce the risk of electrical interference
in the system wiring, we recommend the use of screened cables throughout the installation.
Acceptable, commonly available, screened cables, which can be used on both the sounder and detector circuits
include, NoBurn™ FP200™, Firetuff™, Firecel™, MICC (Pyro™) or any other cable complying with BS 6387
categories C, W, Z.. Refer to BS 5839 pt1 clause 26 for detailed information on cables wiring and
interconnections.
2.1.2 CABLING
Suitable cables should be brought into the cabinet using the knockouts provided via a suitable cable gland
recommended for use with that cable. The screen or drain wire of circuits should be bonded to earth at one
location only, and should be continuous throughout the circuit. Drain wires should be terminated in the cabinet
using the earthing terminal provided.
2.1.3 CABLE LENGTHS
The maximum recommended cable length for a zone or sounder circuit is 1Km. This, however, is highly
dependent on the number and type of devices connected.
If in doubt, cable load and resistance calculations should be undetaken to ensure devices are working within
specified limits.
2.1.4 MAINS PROVISION
The mains supply to the fire alarm panel should be hard wired, using suitable three core cable (no less than 1.0
mm² and no more than 2.5mm²) or a suitable three conductor system that meets the appropriate national wiring
regulations. The panel should be fed from an isolating switched fused spur, supplied directly from the Main
Distribution Board, fused at 3A. This should be secure from unauthorised operation and be marked ‘FIRE
ALARM’.
The mains supply must be exclusive to the fire panel.
As an alternative to a switched fused spur, an appropriately fused double pole isolating device may be used
providing it meets the appropriate national wiring regulations.
All system wiring should be installed to meet BS5839 Pt 1: 2002 and BS7671
(Wiring Regulations). Other national standards of installation should be used where
applicable.
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Содержание Quick Zone XL
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