SMS SenTRI, Data And Installation Instructions, Page: 18 / 52

Mains supply
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Ensure that the mains supply cable enters the panel through a dedicated cable entry, located
adjacent to the mains terminal block and that is also segregated from loop wiring.
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These fire alarm system products are not designed to be powered from IT Power systems.
All mains powered equipment must be earthed. The mains supply to any fire alarm control and indicating equipment must be via an
unswitched 5A fused spur unit. A disconnect device must be provided to disconnect both poles and must have a minimum gap of
3mm. The
disconnect device should be available as part of the building installation and must be easily accessible after installation
is complete.
The fused spur isolator cover should be marked:
FIRE ALARM - DO NOT SWITCH OFF
The fire alarm equipment’s fused spur unit must be fed from a dedicated switch or protective device at the local mains
supply distribution board.
Mains and battery supply connections
The mains and battery supply cables must be installed to a stage to facilitate the power up for commissioning, which is carried out
by the Servicing organisation.
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Where the mains cable is to remain disconnected, its tail ends must be insulated to prevent
dangerous conditions arising in the event of accidental switching on of the mains supply.
Removable terminal blocks
To ease installation the terminal blocks on the Main Control Board can be unplugged from the board.
Installation instructions
18
PANEL
N
L PE
FS3
3.15A(T)
mains fuse
Dedicated mains supply
from the consumer unit
5A Unswitched
Fused spur unit Ensure the mains supply remains isolated
until power up is required for commissioning
the system.
removable