In article , Ignoramus29580 says...


http://igor.chudov.com/projects/17.5-Phase-Converter/

You've gotten many good comments in this thread, but I
think that nobody has touched on this one. I was perusing
the photos and there was one issue that I noticed that
you really should correct as soon as possible on the
converter:

The wiring for the device is clearly protected by the
breaker it is plugged into, and no doubt the conductor
size is appropriate for the branch circuit it is connected
to.

However the control wiring inside the cabinet (the small stranded,
twisted pairs you run for the contactor coils, etc) are not
protected at all.

You need to install a small fuse in the converter sized to
protect those control conductors at an appropriate level,
somewhere around 5 or 8 amps or thereabouts. A clip-in
fuse holder inside the enclosure, or an externally acessible
fuse mount would do the job.

Jim


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