John Rumm wrote:

Does anyone know if there is a way to assess the typical inrush current
for an induction motor?

I helped a mate install a new motor in a small saw table the other day.
The motor he had to hand was a monster 3kW jobbie that had been bought
for some other purpose but never used. I suggested this might be
overkill for the application, since we are only talking about a 7" blade
here!.

Anyway hooked it up via a DOL starter and set the max current trip on it
to something sustainable on a 13A plug. (the motors full load draw being
17A IIRC). Not unsurprisingly we could only spin it up on a circuit
protected by a 32A type B MCB - any circuits off 16A MCBs tripped
immediately. Load when running (but not cutting) was 7A (could not try
any cuts since we did not have a suitable belt and pulley).



Have a look he http://www.memonline.com/cb11.html