07-09-2022, 11:53 AM
Fuses and circuit breakers are actually quite complicated. The nominal rating is what it's meant to be able to carry indefinitely without blowing/tripping. As you go above this, it will blow or trip at some time. Ranging from milliseconds for a huge overload to many hours for a small one. These small overlaods are actually the most hazardous. A 15% long term overload can cause wiring to overheat while the fuse may not blow for many tens of hours. Even a 50% overload will not blow a fuse for quite a while.
Conversely, a short term surge can easily give a nuisance blow or trip as Trevor has described.
13A plugs can suffer from poor contact at the fuse and in the socket. The result can be nasty.
Conversely, a short term surge can easily give a nuisance blow or trip as Trevor has described.
13A plugs can suffer from poor contact at the fuse and in the socket. The result can be nasty.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
