VIDEO 156 – WHY MY FUSE BLOWS AND WHY 8 AMPS WILL NOT TRIP A 6 AMP CIRCUIT BREAKER

To view this video, WHY MY FUSE BLOWS, click on the link below

https://www.youtube.com/watch?v=FZ6-okbgXKo

In this video from Learn Electrics we will look at why a fuse will not blow, or a circuit breaker not trip, at the rated current stated on the device. After all, a 5 amp fuse is a five amp fuse – right?

Questions about this all started with a drawing about TT systems in an earlier video.

5 amps working current flows through a 6A breaker and into the load – and 5A flows out again. 5 amps is less than 6 amps so the breaker does not trip.

But what happens if the load develops a fault and now there is an additional fault current taking the total load up to 8 amps?

Surely the breaker will trip now – but no!

All is explained in easy to follow steps.