Circuit Breaker - Sail Magazine

Circuit Breaker

Gene Cramer of Milwaukee, Wisconsin, asks:"Where can I get a galvanic isolator of the sort you mentioned in your excellent piece on wiring a boat for shore power? Also, the circuit you described in that piece doesn't seem to provide ground-fault protection either for the battery charger or for other branch loads, such as the water heater, which would be hard-wired to the
Author:
Publish date:

Gene Cramer of Milwaukee, Wisconsin, asks:

"Where can I get a galvanic isolator of the sort you mentioned in your excellent piece on wiring a boat for shore power? Also, the circuit you described in that piece doesn't seem to provide ground-fault protection either for the battery charger or for other branch loads, such as the water heater, which would be hard-wired to the CB panel. Shouldn't one install a Ground-Fault Circuit Interrupter (GFCI) outlet near each device and then plug them in just as you would a galley blender?"

Don Casey replies:

You can find galvanic isolators in both the West Marine and Defender Industries catalogs, and I'm sure your favorite chandlery can also get one for you from one of any number of manufacturers.

To answer your second question, ground-fault protection is less of an issue with hard-wired appliances such as a battery charger or a water heater, but you would not be wrong incorporating it into your shore-power wiring. The easiest way to do this is to power these appliances through a GFCI breaker. Although a long wire run could possibly lead to enough capacitive coupling to trip a single GFCI, that probably would not be a problem because of the relatively short distances between outlets on a boat. One GFCI should protect several downstream outlets that are on the same circuit without leading to trip problems.

Related

Outremer45

Boat Review: Outremer 45

It’s funny the way things that work right almost inevitably tend to look right as well. Case in point: the Outremer 45, a catamaran that can’t help but turn heads with its large rig, nicely sculpted cabintrunk and narrow, purposeful bows. Better yet, under sail the boat more than ...read more

Sunset-Tyrrel-Bay

Charter: Glorious Grenada

In the wake of the hurricanes that devastated the Virgin Islands last year many charterers ended up going farther south to Grenada and the Grenadines where they found the sailing excellent and the vibe just fine“God must have been a sailor when he created the Caribbean,” a friend ...read more

WaterLinesNov

Waterlines: Tangled Up in Pots

I learned to sail on the Maine coast as a boy, and one of the things my elders taught me was to respect fishing gear. If you got caught up with a lobster pot, you did everything you could to get clear without cutting the pot warp. It represented a family’s livelihood and thus was ...read more

7353

Harken’s Reflex 3 top-down Furler

Furl PowerAre you afraid of flying—spinnakers, that is? Harken’s new Reflex 3 top-down furler will tame A-sails on monohulls from 44-58ft and multis from 39-55ft, and Code 0’s on 39-54ft monos and 36-50ft multis. All you do is heave on the furling line and the sail will roll up ...read more

TOTW_PromoSite

SAIL's Tip of the Week

Presented by Vetus-Maxwell.Got a tip? Send it to sailmail@sailmagazine.comDitch the stress Owners of high-freeboard yachts best boarded via the stern sugar-scoop like to back them into a slip, but the process can be fraught on a windy day or when there’s a current running, ...read more

Sun-Odyssey-490-Bertrand_DUQUENNE-aft

Boat Review: Jeanneau Sun Odyssey 490

True innovation in monohull sailboat design can be a bit elusive these days. That’s not to say that there are no more new ideas, but it does seem that many new tweaks and introductions are a bit incremental: let’s say evolutionary rather than revolutionary. Just when it seems ...read more