Specifications

Page 9

EN54 FIREFINDER PLUS INSTALLATION,COMMISSIONING & OPERATION

4.6 Power Supplies and AC Mains Installation

Generally the AC Mains will be connected to either a 5 Amp 27 volt supply or 18 Amp 27 volt supply.

These supplies will be either mounted in the upper or lower right hand corner of the cabinet with the

Brigade Board mounted above or below. The wiring should enter the cabinet through the nearest

knockout entry hole on that side.

Refer to Figures 6 - 9 for the wiring and fusing details for each supply.

4.6.1 Connecting the Mains Earth

All earth cabling shall be terminated to the panel Chassis Earth Terminal in a star configuration.

The earth cable closest to the cabinet body shall have an M4 SPW beneath the lug then an M4 SPW

and M4 nut.

Each additional earth cable shall be terminated with an M4 SPW and M4 nut.

An additional M4 nut and M4 SPW are fitted to the Chassis Earth Terminal for installers to connect

their Mains Earth.

M4 Shake Proof Washer

CHASSIS EARTH TERMINAL

M4 Nut

Earth Cable

M4 Nut

M4 Shake Proof Washer *

M4 Nut *

Note:

* Extra M4 Nut and M4 SPW are

provided finger tight on the Earth bolt.

Figure 6: Panel Earthing