On Mar 16, 3:54*pm, "js.b1" wrote:
On Mar 16, 1:51*pm, NT wrote:

No idea if a fridge/freezer inrush mandates 13A over 10A or 7A;
standard fuse sizes are 3A 5A 13A. A lot of cheap consumer products
seem to be using internal components as the fuse :-)

Inrush of around 3x running current would give in the region of an amp
on a modern domestic appliance. Plug fuses don't seem to fussed about
motor startup current in practice, perhaps partly because these fuses
are mostly rated at well above motor rated i anyway.

Is it that low on all of them?

I really dont know, I gather thats fairly typical for induction
motors. I've done more work with other types, which have much higher
startup current.


I did blow a 5A fuse on a modern Bosch larder freezer.
The fuse was in a 1.2m 1.5mm extension lead used to supply it
overnight, and it blew sometime the following morning. The manual does
warn to only use a 13A fuse, so perhaps significant stall is expected
at some point. The 5A fuse might had been bouncing in boxes of screws
for a couple of decades.

who knows, too many possible reasons why.


NT