SigTEL Compact Installation and Configuration Manual
SigTEL Approved Document No. DAU0000091 Rev 5 Page 17 of 36
Emergency Voice
Communication System
10 Mains Wiring
Connect Mains to the MCU/LCU
See BS 5839-9 section 13.
The MCU/LCU requires fixed wiring using 3-core enhanced fire-rated cable (no less than 0.75 mm
2
and no more
than 2.5 mm
2
) fed from an isolating switched fused spur, fused at 3 amps and MUST NOT be connected using a
plug and socket. The 230 VAC cable MUST enter the enclosure via one of the inlets at the bottom right hand corner
of the enclosure.
Ensure that Mains cables are kept as far away as possible from all other cables.
Mains supply should be exclusive to the EVCS. Circuit breakers supplying power to the system should be marked
‘EMERGENCY VOICE COMMUNICATION SYSTEM - DO NOT SWITCH OFF’.
A separate fused spur should be used for the MCU/LCU and should be marked ‘EMERGENCY VOICE
COMMUNICATION SYSTEM - DO NOT SWITCH OFF’.
See BS 5839-9 section 13.2 for more details.
Terminate the Mains input cable using the three-way plug supplied with the power supply PCB and ensure that
correct polarity is observed. The incoming Mains earth connection must be connected directly to the three-way plug
(P2) and NOT to the main chassis earth-point.
MCU/LCU mains connections
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