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Old 14th Dec 2012, 6:15 pm   #159
julie_m
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Join Date: May 2008
Location: Derby, UK.
Posts: 7,364
Default Re: Another unusual plug and some other questions

Quote:
Originally Posted by Alan Stepney View Post
(Why fuse both legs?)
If, and only if, the appliance is wired between two phases of a three-phase supply.

Parts of the Continent used a three-phase supply of 127 volts (phase to earth), giving 220 volts phase-to-phase. Maybe 140 / 240 supplies were used in some rare industrial applications in the UK?

A fuse in the neutral would create a potential death trap if it failed (or should that be "succeeded" ?)
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