I think me asking this question has helped me suss the job. I think I've grasped it.
Battery, battery fuse, battery isolation switch, distribution board.
From the distribution board I send spurs of positive and negative wires to each electrical fitting i wish to serve with electricity.
BUT, some appliances
will have a switch on them or near them, as where they are is where they need to be controlled, but some other appliances
need to be controlled remotely, from a special location on the boat, and this is where I site the control panel
The appliances being switched at the control panel
means that the circuit to these appliances needs to incorporate the control panel switch in that circuit, meaning that there has to be a connection between the distribution unit to the control panel.
The distribution unit incorporates a circuit breaker for each appliance.
Because battery power is limited I need to keep an eye on how much I have in store (electrical potential), so I do this by fitting a voltmeter between the positive and negative cables
between the battery to the distribution unit, and this needs to be switched so that it doesn't waste electricity when I don't need to look at it, and I site this on my control panel.
And because my appliances are consuming electricity I have to keep an eye on that, so I need an amp meter to see how much current
I am drawing at any one time. I site this also on the control panel, but at this moment I am unsure as where it would be connected in order to be between the appliances, the total of them, and, well, have to think about that one a bit longer.
But the penny has dropped i think.
I will be able to charge the battery using shore power
, but will I be able to charge it from my engine, which is a 9.9 outboard
.......I'll find out in due course, I suppose.
I will keep a totally separate battery for starting the engine, one designed for that purpose, like a car battery.
I will make my own control panel and have it around the steering
I will buy a distribution board, of course, and will make sure that it has plenty of 'spaces' for circuits, and i will use a circuit breaker in each of these spaces each dedicated solely to each appliance, using the correct size amp circuit breaker.
Wire size will be calculated so as to be correct for each circuit. Ends crimped with correct size lugs. Conduit will be used, tinned multistrand wire used, gromets if needed to stop chaffing, etc.
Tools to do this work will become known as I set about the task.
I will have to make sure that everything is marine grade and up to current safety
I think that is it.
that, by just asking the question, it has led me to answer it, sort of clearing up a fog
of confusion. I have actually woken up in the middle of the night and come down to write this so that it sticks in my mind.