Envoy 1-4 Zone Conventional Fire Alarm Control Panels Service Manual download pdf (Page 6)

MENV-MINI4-02 Issue2 June 2006

Cable Types and 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 FP200™, Firetuff™, Firecel™, MICC (Pyro™) or any other cable

complying with BS 6387 categories C, W, Z.

Mains Wiring

The mains supply to the fire alarm panel should be hard wired, using suitable three core cable (no less

than 0.75mm

and no more than 2.5mm

) or a suitable three conductor system that meets the

appropriate national national wiring regulations. The panel should be fed from a double pole, isolating,

switched, fused, spur, fused at 3A. This should be secure from unauthorised operation and be marked

‘FIRE ALARM: DO NOT SWITCH OFF’. The mains supply must be exclusive to the fire panel.

As an alternative to a switched fused spur, a double pole isolating device may be used (see diagram)

providing it meets the appropriate national wiring regulations.

NOTE: Any isolating device used, must have a minimum 3mm contact gap.

All System wiring should be installed to meet BS 5839: Pt 1: 1988

(from 15th July 2003 this will be BS5839: Pt 1: 2002) and BS 7671(Wiring

Regulations). Other national standards of installation should be used where applicable

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Envoy 1-4 Zone Conventional Fire Alarm Control Panels Service Manual Page 6