On Monday, 19 March 2018 17:59:10 UTC, Sam wrote:
On 19/03/2018 16:53, Dave Plowman (News) wrote:
In article ,
whisky-dave wrote:

Which is the best fuse to use (3A, 5A or 13A) with a 1.15kW electric
fire at a potential difference of 240v

If you're talking a plug fuse, the load is irrelevant. As it is to protect
the flex etc. In other words, a table light with a 20 watt bulb would be
fine with a 13 amp fuse if the cable was rated at 13 amps.


Won't all fuses less than 13a protect the cable then!

No, for 4 reasons.

1. Some appliances have old thin cables that come nowhere near being protected by a 10A fuse.
2. Some old appliances need low current mains fuses to give them basic safety protection.
3. Some new appliances have noncompliant CCS cables.
3. Some 13A fuses are in reality 13A or greater. This applies both to old pre-ASTM and new counterfeit fuses.


NT