Wiring for 110V and 230V is the same stuff. Essential is the amperes. You have to check the gauge (wire copper area, see wikipedia) and then look how many amps are allowed. Probably 6 A/mm2 is allowed. You can check US standards for amps vs gauge for mains power. Cotemar did this and reckoned it is safe to go to 16 A per group / wire.
Maybe your ships is pre-wired. This would be great. If not, there is still a lot you can do by using cable ducts.
Standard from Fountaine Pajot
are 4 outlets:
1. On the aft side of the nav table. See first picture. You will see the original 230V contact, plus 2 holes for 230V contacts that I made, connected to a 150W inverter
phones and so and a laptop
2. In the port rear cabin, in the wooden panel below the bed
, next to the hole that gives access to the storage
3. The same, starboard rear cabin.
4. Below the light switch of the saloon
, see second picture.
First, where to put the fuse box. The standard box has the following:
- A safety
breaker that breaks power by stray currents. It has double contacts since on a boat you do not know the polarity, unlike in your home
- 4 groups of 6A automatic circuit breakers, with double contacts. One is for the battery
charger, one is for the hot water boiler, one for 2 mains power outlets starboard, one for mains power outlets port. If I were you I would take 16A instead of 6A.
In the third picture you will see a Mahe in production. The mains fuse box has the green square around it. The blue square is a Mastervolt inverter
which is not standard. The yellow squared one is some fuse box probably for the inverter.
Don't forget your grounding! If you don't know what to do, ask or get an expert.
You want to keep things simple. Consider to use a combined charger/inverter. It is more expensive, but: This makes switching over from shore power
to inverter-powered much simpler, you do not need switches or relays, it is much more user friendly. Only risk is that you discharge your batteries too deep or too fast.
charger is 40A. I consider this enough, if you are connected to shore power this is probably for a whole night, long enough to charge at 40A.
OK, then how to wire the stuff.
Maybe you boat is pre-wired, that would be great. If not there are possibilities to pull wires to the right places using cable ducts and hidden spaces.
First, the nav table 110V outlet. Look at the red square of the picture of the mahe in production. This is pre-wiring for the nav table contact. First you have to check out the rear locker in the rear port bedroom. This locker has 3 shelves. Remove the ceiling of the upper shelve, by undoing 4 screws which are hidden inside 4 white triangular plastic pieces holding the ceiling. Above this you might see a big pipe holding the pre-wiring for the nav table. If yes, pull this back from the nav table. THEN drill a very big hole above the nav table for the 110V outlet(s). This way you avoid drilling through the wiring.
Maybe put 3 or 4 110V outlets there. Charging
phones and so.
If there is no wiring in this pipe: it is not easy to pull wires through since there is a T junction somewhere lower. But try. (You might look behind the big wooden panel starboard of the port bed
, it might be there.)
If there is no pipe: then you have to use the other big pipe. Go to the hanging locker in this bedroom. Open the square white cable ducts. There might be a big round pipe going very near to where the fuse box should go. You can use this. It is easy to get from this pipe to the nav table 110V outlet, once you have that ceiling removed.
I use this big pipe for: Original Furuno GPS antenna
, shunt connection for the battery monitor
, plus extra's to be installed:
2 wires for solar panels
, and an extra NMEA
2*2 lead cable for connecting the nav table to the autopilot
, and GPS antenna
. These I will all pull in one go.
Check whether there is pre-wiring under the beds.
By now you will know whether your boat is pre-wired.
If yes, remove the saloon light switch. Check through the hole whether there is mains wiring behind this switch, see the second picture. This is a good spot for another 110V outlet.
I hope this is clear enough. Ask if you need more info. If you are on skype, send me a private email
with your details.
And have a nice weekend.