4. Interconnection - Hard Wired
A combined maximum of 12 Smoke Alarms and/or Heat Alarms may be wired
together such that when one unit senses fire all other units sound a warning -
(see Table 1 for the alarms with hardwired interconnect option). This helps
ensure the alarm will be heard throughout the property.
Do not connect to any other device as it may damage the unit or affect
performance.
A maximum of 250 metres of two core, 0.5mm
2
to 0.75mm
2
, stranded signal
cable can be used, (maximum resistance between detectors 50 ohm). The
Alarms are interconnected by wiring all the terminals marked 1 together, and
all the terminals marked 2 together (see in Figure 9a). Note: Draughts from
wiring openings, conduit, or mounting boxes/holes, may blow smoke away
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