Wiring diagrams

[Venatrix]

Hi. I am starting with a blank canvas with respect to my Fairey Spearfish. She is 40 years old and everything was in pretty poor condition and the recently deceased previous owner had removed the engines and disconnected everything.
So I have continued that theme and that has left me with a clean start.
Can anyone recommend a company to produce a wiring diagram based on the bare outlines of what I want to end up with in terms of lighting and pumping etc etc. I have the competency to do the job but really would like an expert opinion on how to achieve it along with a drawing and plan

 

[moomba]

Hi. I am starting with a blank canvas with respect to my Fairey Spearfish. She is 40 years old and everything was in pretty poor condition and the recently deceased previous owner had removed the engines and disconnected everything.
So I have continued that theme and that has left me with a clean start.
Can anyone recommend a company to produce a wiring diagram based on the bare outlines of what I want to end up with in terms of lighting and pumping etc etc. I have the competency to do the job but really would like an expert opinion on how to achieve it along with a drawing and plan

Hi there is software products out there here are a few some might be ott. but might help yoo undertstand the basics
http://www.new-wave-concepts.com/pr/circuit.html
https://www.pcschematic.com/en/electrical-cad-design-drawing-software/automation-electrical-cad.htm
https://www.edrawsoft.com/electrical.php

 

[prv]

Hi there is software products out there here are a few some might be ott. but might help yoo undertstand the basics

He's asking for electrical design consultancy, not drawing software.

Pete

 

[moomba]

He's asking for electrical design consultancy, not drawing software.

Pete

If OP is confident in doing the wring himself , then why not have a go at drawing out with the help of free software what you need get yourself Nigel Calders book mechanical and electrical and work your way through it.
I re wired a 42ft boat no issues take your time and draw it out

 

[jim.howes]

Hi Moomba is right DIY is a good idea as it is only a schematic drawing you need. I have recently done a complete rewire on my vessel. As you are dealing with generally simple 12 or 24 volt systems it should not be difficult. I started with some sheets of A3 (sketch book) paper, drew rectangular boxes to represent all items(ie Batteries, switch panel(s),vhf, stereo,external lights,internal lights,plotter etc) to be connected with good size gaps between each rectangle to allow for your wires to pass by placed a + & - on each box to represent connections and using a red pen and a black pen I connected all the boxes to either the batteries or the switch panels. When finished I checked all the connections were right I found one or two mistakes and with the aid of tipex soon corrected. Then down to my local printers had some copies made (just in case you wish to make any further additions) and had one of the copies laminated. I was really pleased with the result and after rewiring the boat and everything worked as should I gave myself a pat on the back and an extra pint. Jim

 

[superheat6k]

I use a pay for, but quite cheap App for Mac called ElectricDesign. Simple to use and decent drawings.

If you do buy it happy to send you the files I have created for my own boat to get you started.

 

[Venatrix]

This all sounds positive. Thank you for your input. Nigel Calders book seems a good starting point.

 

[William_H]

I think OP is over planning this operation. He should ensure that he has conduit or similar to all electrical locations then simply start from the beginning. The design of the whole system evolves and is simply dictated by the services.
So probably most difficult and complicated is engine electrics. This wiring diagram will come from the engine maker. Give yourself a switch panel with enough room to add lots of things like switches circuit breakers etc. But start simple.
You fit an engine start battery and possibly an isolation switch. You can just connect lights radio etc to this battery.
However if you envision camping over night or long sailing voyages you need a service battery (deep cycle) which you can confidently discharge without concern re engine starting. Connect the negative of this battery to the neg. of the engine system. This service battery (with isolation switch) is separately wired via switches fuses etc to your services. Almost certainly starting with cabin lights nav lights, radio and nav gear.
Now you fit a switch (high current) to connect between the engine battery pos and the service battery positive.
This switch is operated when the engine is running to charge the service battery and is opened when the engine is stopped.
This switch can also be operated to provide an emergency jump start facility if engine battery dies.
However it is easy to substitute a Voltage sensing relay to do this same function connecting automatically when engine battery is being charged. Some will also be able to handle jump start current if not add the switch as well.
So I am saying you don't need an electrical design service just let it all evolve. ol'will

 

[smithy]

Here is the PDF of the wiring diagram for my boat if its any help. I just drew it out one bit at a time and kept adding to it. The original was drawn with each circuit on a separate layer to simplify it. Might not be perfect but everything works ok.