Boating New Zealand - July 2018

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control circuits. In addition, multiple combinations of circuits

can be grouped into zones to be switched on or of together.

Mastervolt’s CZone and Raymarine’s EmpirBus are probably

the two best-known digital switching systems, but there are

various other options. Douglas says a digital switching solution

should certainly be considered for larger vessels with more

complex wiring.

Another area where technology has moved forward

dramatically is the area of fuses and circuit breakers. In a

well-designed system, every component will be independently

fused, so any failure is quickly and safely isolated. Previously,

this meant fuses (and spares), but modern circuit breakers

are compact and cheap – and a much better option. New

regulations also call for Residual Current Circuit Breakers,

which respond both to shorts and overloads.

he other major rewiring consideration is incorporating

LED lights. Although replacement LED bulbs for older ittings

are available, the new lighting units are slimmer and brighter,

with many more options for itting. Marine units are often

completely waterproof and use far less power than older

incandescent bulbs. his means you can install more lights in

more places, with a lighter load on the batteries.

LEFT Unless you’re a really

competent DIYer – leave a complete

rewiring project to a professional.

There are too many potential pitfalls.

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