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Old 08-21-2006
Blue Eagle Blue Eagle is offline
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Quote:
Originally Posted by sailingdog
Apparently, Jorjo seems to think he knows more about boats and the proper wiring of them than the ABYC standards group. Yeah, right...
The ABYC are catering to their constituency I'm afraid - Yachties. Not a group universally renowned for their DIY prowess. Jorjo and others are absolutely right, the most effective way to permanently join an electrical cable to a connector is with a solder-joint. Crimp joints are only used for expediency's sake by OEM manufacturers, and usually for lack of skill, knowledge or understanding by DIYers. Even if a tight crimp is made, contacting clean stripped wire, the surface area for current transmission is unlikely to be as great as with a well-made solder joint. Hence the crimp will warm up, and the moisture in the air (and there will be some present, even if you've subsequently put a heat-shrink covering over the connection) will slowly allow the connection to corrode. Perhaps not enough to stop it working altogether, but certainly enough to impede current flow - causing heating. And hot cables cause fires of course.

A well-made solder joint - by which I mean one made between clean, tinned wire, and a clean connector, with just enough solder applied to allow it to run by capillary action into the joint, and not to "bubble" outside, and which looks shiny rather than dull (a "cold" solder joint) - will eliminate any possibility of moisture ingress into the joint and ensure 100% contact between wire and connector. This is in direct contrast to what a crimp connector achieves.

To quote Tom Cunliffe of Yachting Monthly "crimp connectors have no place on boats".

Finally: Brittleness of solder joints
As to concerns raised here about brittleness of solder joints... it's rubbish I'm afraid - what the correspondents meant to talk about was the fatigue stress-point as the wire which has been rendered solid by the solder (which in any case shouldn't extend beyond 1/8" outside the connector) gives way to the flexible wire. The same situation will be experienced however where the wire exits a crimped fitting. This should be a non-issue in any case. If you have wires flapping around to the extent that fatigue becomes a concern, your problem is that YOU HAVEN"T SECURED AND SUPPORTED YOUR WIRING PROPERLY!!

Never mind what ABYC say, what do navies around the world do?

cheers,

Blue Eagle
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