On Tuesday, 17 April 2018 10:55:42 UTC+1, Graeme wrote:

Back to the Morris. I have an ammeter, 30-0-30, and the dynamo is rated
13.5v, 22 amps. Still +ve earth. What I don't have is suitable brown
cable, and there seems to be a lot of conflicting advice.

was the original brown?

Found cable described as 3.0mm² 44/0.30 27.5 Amp, which seems OK, or
should I go for 4.5mm² 65/0.30 35 Amp to be on the safe side?

Voltage drop is likely to be the no 1 consideration. 1mm2 pair drops 44mV per amp per metre, so 22A 3mm2 drops 0.323 volts per metre. 1m of that is going to seriously hamper your battery charging.

Any idea of 'standard' car Lucar connector size? Options seem to be
6.3mm, 8mm etc. I'm guessing 6.3, being equivalent to the old 1/4 inch?

Thanks!

you're the one with the measurand!


NT