[time-nuts] DC distribution

[Mark Goldberg]

At a risk of having you folks tear it apart, here is my poor man's guide to
getting good crimps on large cables:

https://sites.google.com/site/marksrvmods/home/battery-wiring

You can see the cross section and there are no voids at all. You can hardly
see where the wire strands end and the lug begins.

These have given up to two years of service in my RV with no issues. I do
similar crimps with the Anderson SB175s.

I am using welding cable with a lot of strands. Tinned Marine cables and
lugs would be even better, but we live in a very dry climate.

Regards,

Mark
W7MLG


On Mon, Oct 7, 2019 at 9:00 PM Martin Flynn <martin.flynn at compdecon.org>
wrote:

> After a failure under load of a starter cable on a large generator, I
> finally broke down and bought a Burndy hydraulic crimper for the grounds
> and cables I normally use.
>
> Did two test low-tech tests:
>
> First test on a 1" section of 2/0 DLO cable, with a two bolt telco lug
> at each end.  It failed at ~2200 ft/lbs, the wire itself broke strand by
> strand.
>
> Second test involved sawing the crimp across the barrel and looking for
> voids.  Using factory lugs and die, no voids were visible at 25X
> magnification
>
>
>
> On 10/6/2019 2:46 PM, Mark Goldberg wrote:
> > It is even more difficult. I bought some cables from a company because I
> > did not have a crimper for 4/0. I was not impressed. My crimps were much
> > better.
> >
> > I don't have a specific recommendation, but you should get a feel from
> them
> > that they understand the standards. Places that do work for aviation
> > generally have to do good work, as lives depend on it. Unfortunately, it
> is
> > a high labor activity, so many are not in the US. A long time ago, I
> worked
> > with some just south of the border in Mexico that did good work.
> >
> > Regards,
> >
> > Mark
> > W7MLG
> >
>
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