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EXPro Installation Manual
ELECTRICAL CONNECTIONS
CONNECTING TO THE MAINS
The mains supply to the panel is fixed wiring, using Fire resisting 2-core + screen cable (between
1mm² and 2.5mm²), fed from an isolating double pole switch fused spur, fused at 3A. IT SHOULD
NOT BE CONNECTED THROUGH AN RCD. This should be secure from unauthorised operation and be
marked "FIRE ALARM DO NOT SWITCH OFF".
There should be a Mains Disconnect Device (EG switch or fuse point) located near the fire alarm
panel to allow a service engineer to power down the panel. It should be an isolating double pole
switch with contact separation 3mm. The disconnect device should be marked "FIRE ALARM DO NOT
SWITCH OFF". The supply must be exclusive to the fire panel.
The incoming mains cable should be fed through a cable gland secured to the entry hole closes to
the mains termination. Inside the enclosure the mains cable should be connected to the Live (L) and
Neutral (N) terminals on the power supply cage. The mains cable must not cross over the zone
cables to help minimise mains interference.
Figure 3. Wiring the mains connection
Approved Document No: GLT-212-7-1
Issue: 1.7 Author: MF/NRPJ Date: 05/07/2021
www.acornfiresecurity.com
www.acornfiresecurity.com
Page 10
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