On Saturday, 24 March 2018 03:16:00 UTC, wrote:
On Friday, 23 March 2018 13:05:57 UTC, whisky-dave wrote:
On Friday, 23 March 2018 01:50:20 UTC, wrote:
On Tuesday, March 20, 2018 at 2:48:07 AM UTC+11, Graham. wrote:

Which is the best fuse to use (3A, 5A or 13A) with a 1.15kW electric fire at a potential difference of 240v
1150/240=4.79 so theoretically a 5A fuse shoud do.
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Graham.
%Profound_observation%

May be 5A will do, as "cold" heater element resistance would be higher than normal heating.

But according to regulations in the UK on changing fuses it should be either a 3A for below 720W or a 13amp for above 720W .

incorrect.

https://www.rospa.com/home-safety/uk...hoosing-fuses/

ROSPA is not regulations.

Those are the one we have to follow they are part of college regualtions that all plugs were to be fitted with either a 3amp or 13amp fuse NOTHING else was to be used for stabndard lab equipment.