In article , John
Rumm writes

(if the circuit were protected by a BS3036 rewireable fuse, or the
circuit a tad out of spec, the flex longer or thinner etc then the fuse
in the plug would be essential).

And this is part of the reason why appliance flexes are so short
nowadays: not only is the manufacturer saving a few pennies but they're
ensuring the flex is short enough with low enough resistance for a fault
current to blow the 13A fuse in the plug.

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