Source of Tinned Copper Wire

Western Electrical, down in Plymouth, sorted us out with all different diameters last summer. Cheaper than anywhere else... Not certain, but think they can arrange delivery.
 
Finely stranded tinned copper is without doubt the best choice.

The reality is that my 30 year old Sadler was wired by the makers with standard untinned 5a flat 2-core flex and everything still works fine. Likewise the very basic 230v circuit wired in standard 1.5mm solid-core T&E.
 
Finely stranded tinned copper is without doubt the best choice.

.....
It's a good choice, but if money is no object there are better platings.
Silver is not that uncommon in equipment wire.
Plain copper should be OK for most areas of a boat, you should keep the electrics dry....
Tinned wire will last better than plain, but it won't last for ever in a wet boat.
 
Plain copper should be OK for most areas of a boat, you should keep the electrics dry.....

Someone should tell the OEMs that !
My boat had multi pin connectors for the port to starboard systems at the lowest point of the forward bilge; at the level of water that the bilge pump could not remove. Admittedly, they used what appeared to be waterproof connectors (which proved not to be on continual immersion !). Thankfully the only water ever there was fresh water and the wire they used was tinned and survived better than the connectors did. Connectors removed, adhesive lined heat shrink crimps plus an additional length of adhesive lined heat shrink used when extending the wiring to new connectors well above any water. The stupid thing is that they could easily have extended the loom by 24" on one side and shortened it by 24" the other side and precluded the problem in the first place.
 
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