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To braid or not to braid...?

What is the best wire to use for connecting a motor?

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M Harvey27/04/2021 09:52:09
21 forum posts
14 photos

I'm connecting a Torpedo 800 electric motor to my boat and was wondering if it is better to use braided wire or single core?

Any thoughts gratefully received.

Michael

Malcolm Frary29/04/2021 10:08:38
1029 forum posts

Assuming that braided wire means stranded flexible wire, rather than the unlamented Litz wire that was always a total pig to terminate or the stuff found as the outer shield on co-ax and similar.

Flexible wire, by its nature, flexes. It absorbs vibration and allows you to work around it easily. Rigid bits, like soldered terminations benefit from added stress relief such as heat shrink sleeve over the area where it transitions from solid (solder) to flexible.

Solid single core does an admirable job of putting the electric where it s needed, but does not like vibration. It either provides a weak spot that eventually breaks or transmits the force into whatever it is terminates to, which might, in turn, provide the weak spot.

Working in the vicinity of wire, flexible lets you move the wire out of the way, solid doesn't, or at least, not easily.

M Harvey29/04/2021 12:58:18
21 forum posts
14 photos

Thank you for this exemplary reply. Completely makes sense...

Michael

Richard Simpson29/04/2021 13:37:37
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649 forum posts
302 photos

Braided cable also holds solder much better as it soaks in between the strands giving a stronger joint.

Just think of it as your home installation.  You use flex where flexibility is needed i.e. on appliances, but you use single core where the installation is permanent i.e. the socket and lighting circuits.

Edited By Richard Simpson on 29/04/2021 13:39:28

Chris Fellows29/04/2021 13:56:29
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991 forum posts
643 photos

And if you need to buy some cable go for the silicone covered for added flexibility.

Chris

ashley needham29/04/2021 17:19:18
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7323 forum posts
156 photos

Ordinary round electrical cable (inner wire) does it for me mostly. Nice coloured wires and very cheap.

Torpedo 800 not drawing a lot of amps.

Ashley

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