If I had to do such a "deliberate trip"
today, I'd probably do
something like plug in an iron and a hair dryer - high-draw devices
that together exceed the breaker's trip point, but not as drastically
so as a dead short.
The trouble with that is most non-electronic breakers need 100%
overcurrent to trip in <15 seconds, so it would take five 1500W
hair dryers to trip a 15A circuit.
This makes testing 100A three phase breakers interesting.
Lee.
________________________________________________________________________
This e-mail has been scanned for all viruses by Star Internet. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________