filippomasoni
New Member
Fuses and breakers are meant to protect wires and we place them close to the battery side as possible to each different size wire.
So for example a 200A class T fuse to the battery, than at the busbar each big load gets a fuse, than say a 30A fuse to a fuse box and then each small load (2-5A) gets a blade fuse. Once we get to a load, some actually have an integrated fuse to protect the internal wire, but when we get to small 5v or 3.3v circuits we usually don't find any fuses.
If a short happens down the line at a load, will the blade fuse of that specific load blow first or will the class T fuse, which is usually fast acting and therefore quicker?
As far as I understand the small wire of that load won't be capable of carrying the current necessary for the class T fuse to blow, essentially acting as a fuse itself which means the fuse of that wire has to blow first, but I'm not sure if that's correct.
Furthermore, using DC hydraulic magnetic circuit breaker (like airpax sensata) the magnetic feature should quickly close the circuit in case of a short before the temperature raises, but still will this be quicker than a class T fuse at the battery?
So for example a 200A class T fuse to the battery, than at the busbar each big load gets a fuse, than say a 30A fuse to a fuse box and then each small load (2-5A) gets a blade fuse. Once we get to a load, some actually have an integrated fuse to protect the internal wire, but when we get to small 5v or 3.3v circuits we usually don't find any fuses.
If a short happens down the line at a load, will the blade fuse of that specific load blow first or will the class T fuse, which is usually fast acting and therefore quicker?
As far as I understand the small wire of that load won't be capable of carrying the current necessary for the class T fuse to blow, essentially acting as a fuse itself which means the fuse of that wire has to blow first, but I'm not sure if that's correct.
Furthermore, using DC hydraulic magnetic circuit breaker (like airpax sensata) the magnetic feature should quickly close the circuit in case of a short before the temperature raises, but still will this be quicker than a class T fuse at the battery?