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Old 21-07-2016, 21:56   #46
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Re: Starter wiring with in line fuse?

Originally Posted by boatnerd View Post
Universal wiring diagram shows a 20A fuse on the solenoid/ ignition wire and a 30A fuse on + bat wire going to the amp meter which I'm assuming is over current protection for the instrument panel. A better location might be closer to the battery, possibly an ANL fuse on the starter battery cable as mentioned? It's actually before the + terminal on the starter. . I personally would fuse the alternator output too with an appropriate size ANL fuse. It's also shown going to the amp meter. .Although it may be current limited, the alternator is the main electrical conductor which should be protected (abyc). . I believe solar panels call for inline fuses too. Especially if you've using electronic mppt charge controllers. . sorry I'm drifting
Catalina, at least, stopped putting ammeters in the cockpit panels as long ago as the late 1980s. Doesn't mean that some unknowing skippers still have them, as well as on other manufacturer's boats, altogether too many.

Stu Jackson
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Cowichan Bay, BC, (Maple Bay Marina) SR/FK, M25, Rocna 10 (22#) (NZ model)
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Old 21-07-2016, 21:58   #47
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Re: Starter wiring with in line fuse?

I still have the ammeter, but all its doing is plugging a hole!

Bristol 31.1, SF Bay.
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Old 21-07-2016, 22:18   #48
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Re: Starter wiring with in line fuse?

Originally Posted by boatnerd View Post
Here is a example where they are needed when multiple panels are in parallel. This is from a major solar distributor. In a small setup(1 or 2 panels) a fuse close to battery may be all that's to keep it simple. . I find biggest challenge when fusing on a boat is waterproofing fuse holder and dealing w/ voltage drop.
Regardless of what some solar companies state fuses are not needed between panels and controller. The panels are self limiting. If a panel is rated at 5 amps you will only ever get 5 amps from it.

Not sure what you mean by dealing with voltage drop. It is easy enough to find the correct wire size. The problem I see most often is people choosing a wire too small which limits the fuse size. As far as waterproofing it shouldn't be an issue as all fuses will be near the batteries.

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