Re: Very Old (Immersion Heater?) Switch
India tends to use the 5A.
The short 3/4" (20mm) fuse is usual with BS546 system. Fused 15A plugs were always a rarity in GB. The idea was that a 5A rated appliance could have a 15A plug with a 5A fuse, saving the need to change the fuse on the board.
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