HMD19 Basic Electrical & Accessories

[blueflood]

I have been scouring the web for books (which I already own a few) but none really have schematics for a basic electrical layouts. Granted there are so many variables here but for my HMD19 and 15hp(? still debating) outboard supplying 12amps and the anticipated electrical load consisting of fuel gauge, tachometer, hour meter, navigation lights, horn, VHS radio and a small GPS / chart plotter. I was wondering if anyone out there (Chicagoross) has a similar set-up and available wiring diagram ? I am keeping everything basic, simple with nothing more (but may want a bit of moving room for later on i.e. AM/FM/CD). I was not planning on anything than the starting battery, wanting to avoid house batteries altogether.

Marc

[Cracker Larry]

Deleted. Double post

[Cracker Larry]

Does this help you any...

[AMC]

When you go to look for a switch panel / fuse block, look for one that has front replaceable fuses. You will be thankful you did.

[peter-curacao]

Hey Larry thanks for that drawing one question though shouldn't the grounding be separate from the negative?

[Cracker Larry]

No. That would be called a floating ground and we don't float our grounds, just our boats The engine block itself is electrically the negative and the ground. Everything grounded is connected to it.

Unless I misunderstand your question?

[peter-curacao]

No. That would be called a floating ground and we don't float our grounds, just our boats The engine block itself is electrically the negative and the ground. Everything grounded is connected to it.

Unless I misunderstand your question?

Probably I'm wrong I always thought all the ground wires (clean grounds,green wires)fill caps, tanks etc. goes to the engine ground and all those stays apart from the negative terminal

Edit: let me try to explain better by this example, when I was installing oil rigs we had clean and dirty grounding the dirty grounding were the shields you find in cables under the first isolation, that was always connected in one way of an other to the closest steel or metal structure near by (deck), the clean ground was an insulated wire (next to the negative insulated string) what was in the cable after peeling away the first isolation, ground shield and a couple other insulators, that wire went to the clean grounding block what went directly into the sea through a insulated main ground cable.

[Cracker Larry]

OK, now I understand what you are saying Yes, that is the correct way for a boat of any complexity also, my diagram was just for the current carrying wires in the electrical system. The "dirty ground" is what we usually call a bonding system in a boat. They connect all metal structures above and below the water with a heavy gauge wire and ultimately still ground to the engine block, but don't carry any electrical load.

In my OD18 I have grounding (bonding) wires connecting the T-top, throttle, steering wheel, fuel tank and fill, thru-hull fittings and engine block. Electrically they all terminate at the engine block and negative battery post but they use different cables than the load carrying wires in the diagram.

[jacquesmm]

BTW, there should be a basic electrical diagram included with the plans, something to use as a starting point.
And there is this excellent little book:
http://www.bateau.com/proddetail.php?prod=SPA002

[blueflood]

Salut Jacques,

Yes, there was not one included though

Marc