Re: Ignition wiring question for an old boat
Jay, I just took a quick stroll through your thread here and have a few suggestions for you. BTW, I do have many years (40+) of working in this field, including marine electrical.
I would avoid using an ignition switch that offers an Accessory side. We don't need a key switch to provide power for VHF radios, GPS, etc.
Typically, these do not require a key switch function, and are best if powered via their own separate individual power source... IMO. In fact, I have never owned a boat whereby the ignition key switch powered these, nor would I care to.
What I prefer to see would be a new, fresh dedicated circuit run forward to a new, fresh dedicated fuse or breaker panel. It does not need to be excessive. 6 new circuits will usually provide all that you need for GPS, VHF, DS, FF, etc.
This completely removes these loads from the OEM Engine/Hull harness.
When the hull is powered up via the MBSS (main battery selector switch) these will be powered and ready to go.
When we leave our boats, we typically turn the MBSS to OFF, so no key switch needs to be involved.
Chalkman, I believe that a Windlass will require much more than 10 ga. We'd be getting into cable, not wire, for a Windlass power circuit.
I have to agree with Mark, and disagree with using the pre-applied shrink tube wire fittings. The crimp tool (even high end tools) typically disturbs the shrink material, and when heat is applied, the shrink material fails right at the crimp. While it may sound like a good idea, I won't use them!
This is from my actual experience having seen these fail.
If you like the shrink tubing idea, I'd recommend that you use bare wire fittings, and apply separate shrink tubing.
That is the correct method, IMO.
You may also want to eliminate the push-plug fittings, and use a ring terminal junction block with protective cover. The little harness fittings can fail due to eventual corrosion.
This can become a large undertaking, but will reward you in the end. Have fun with it.
Rick ... aka Ricardo
28' SDN F/B w/ twin Volvo Penta 5.7L DP's