On Saturday, 3 November 2018 15:05:48 UTC, Fox's Mercantile wrote:
On 11/3/18 9:37 AM, Ralph Mowery wrote:

In just the last few years I have been looking at the older equipment
(some in the mid 1960s) and they were 2 wire devices. They had the
switch on one side of the transformer and the fuse on the other side.
I don't know about the code or why it was done that way. I would have
thought the fuse would come first on the hot wire and then the switch.
Much of the equipment is ham radio related and most users would have a
good connection of the chassis to the earth ground.

Because in the end, it's a series circuit. It doesn't make a damn bit of
difference.

Primarily, it was done from a "Is this the cheapest and easyist (also
cheapest) way to do it this way?"

It makes a huge difference.
Fuse in live blown: faulty equipment is now dead.
Fuse in neutral blown: faulty equipment looks dead but is live.
One can electrocute you after a live to case fault, the other won't.
This is why UK banned dual pole mains fusing in 1955.


NT