4 Comments
Tyler
What tool did you use to make this diagram?
Peter Kennedy
There is an article in the Victron blog about Peter Bakker, who is the one that draws these diagrams
Peter Kennedy
I use Microsoft Visio for my drawings. This is one that was drawn by someone at Victron and appears to be a more full featured CAD program.
Cade Pia
Peter - where you talk about the " Main DC Distribution - I would suggest that the main power supply to the DC panel be protected by a circuit breaker and not a fuse." What model of circuit breakers can you link multiple together with a link bar to form the Main Positive DC Distribution? eg: Like what is in the diagram with the Victron Mega Fuzes, but with circuit breakers instead.
Andy Hough
Could you tell me what the cable is between the Shunt…labelled B1 B2 and the Pre Main Fuse which also has an in line 100ma fuse. Thanks
Peter Kennedy
The power supply cable for the BMV battery monitor is supplied with it, and the power supply cable for the CCGX is also supplied with it
Patrick
Can you explain the MCB/RCD breaker on the AC-Out of the Multiplus? That's omitted from your articles. Victron recommends it but I would like to know why, and I've found a lot of disagreement on this amongst installers, both professional and otherwise. What is the breaker protecting from if the inverter is a current limited device and the breaker is going to be sized above the maximum current the inverter can generate? If something is needed on the AC-Out wire between the inverter and the branch breakers, what should it be? Victron says ELCI in some places (and the Blue Sea versions of that are quite expensive!) but others say just a double-pole breaker, ABYC A-31 figure seems to indicate a single pole breaker, and some people do no inverter-specific breakers at all (other than their shore breaker, main AC breaker and branch breakers/GFCIs).
Peter Kennedy
You will of course have a circuit breaker on the AC Input of the MultiPlus The MultiPlus is a limited power supply and there is only so much power that it can make, so as long as you have sized your wires for that capacity then it doesn't make too much sense to me to require additional circuit protection outside those limits. Note that the Multi can augment the shore power in so if you are using that feature you have to include that in your calculations of wire size. The Victron manual mentions a Residual Current device on the output. That is not mentioned anywhere in the US standards. In the US It is common practice to fit ELCI's on receptacles. This is especially useful in damp areas but I see no reason why you wouldn't have them in most places. ELCI's have a 5mA trip, lower than most residual current devices and thus giving a higher level of safety. Its not really practical to have such a low trip level for the whole boat, there would be too much nuisance tripping. In the US there is a requirement for an ELCI on the incoming shore power. This is set at 30 mA and the primary aim here is to protect swimmers in the water from electrocution. The latest version of the National Electrical Code also calls for ELCI's on dock receptacles. This will only apply as they get replaced but over time all receptacles will end up being fitted with them.
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