9
IRRITROL Decoder Systems
Wire length of the 2-wire
The wire length depends on the diameter of the
wire.
The following tables show 2-wire wire length for
a system with up to 48 decoders per 2-wire path,
with 4 decoders active, and with the decoders
evenly distributed.
Wire length of the solenoid wire
The wire length depends on the diameter of the
wire.
In general, it is recommended to have as short
solenoid wire as possible to limit lightning
strikes.
Nominal wire size
Loop Star
KM Miles KM Miles
2.0 mm
2
9.6 6.0 2.4 1.5
2.5 mm
2
16 10 4.0 2.5
MAXIMUM LENGHT OF CRITICAL WIRE PATH - METRIC WIRE SIZE
4. SURGE PROTECTION REQUIREMENTS
Grounding of the system is important to protect
the installation against lightning surge.
A lightning surge may damage the system if it is
not properly protected. A lightning surge can be
induced anywhere in the system. The lightning will
be induced in both wires as a common surge.
The induced surge will traverse along the wires
until it can pass on to the ground.
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