On Sun, 15 Jul 2007 01:09:13 +0100, John Rumm
mused:

Graham wrote:
"instant on" fuser that draws 10A or so for a short burst to heat the
fuser when you start printing.

I have heard a figure of 40A inrush mentioned, Like here
http://www.crs-uk.biz/pdf/HP_1100.pdf
Doesn't say how many mS, but MCBs are fast acting.

Fast acting yes, but you would need 160A to push a type B 32A MCB into
its instantaneous trip response. (or 100A for a 20A MCB on a radial)

(note also that laser printer don't usually blow their plug fuses)

I suspect the electrician has read something similar to the above but
not really understood it.
--
Regards,
Stuart.