Martin Architectural Rail Light, Installation Manual And User'S Manual

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12 Rail Light user manual
distribution board to the first luminaire and a further distance of 20 m
(66 ft.) to the middle of the circuit. At a line impedance of 400 m
Ω
, the
maximum is reduced by 10%, and at a line impedance of 200 m
Ω
it is
reduced by 20%.
RCDs and earth leakage
Many fixed installations use common neutral conductors in branch circuit
distribution boxes. To avoid unintentional tripping of the RCD (residual
current device or ground fault circuit breaker), ensure that the Rail Light’s
neutral conductor is connected to AC power via the same RCD as the live
conductors.
Important! Each Rail Light armature contains an electronic ballast that
“leaks” a total current of approximately 0.5 mA to ground
(earth). Make sure that fixtures are correctly connected to
ground (earthed) so that this “leakage” current can be
absorbed.
The 0.5 mA “leakage” current from each armature must be
allowed for when connecting luminaires to a circuit that is
protected by a 30mA RCD (residual current device) for ground
fault (earth leakage) protection, otherwise the RCD may trip
unintentionally. Bear in mind that some RCDs rated at 30 mA
may trip when leakage to ground is as low as 20 mA.
Depending on the type of installation, electrical regulations in
some countries may permit the use of RCDs with a trip current
rating higher than 30 mA. When considering this option, the
installer must ensure that all local building and electrical
regulations are respected.