NCX19
Member
"" What I’ve generally read is that fuse rating should be 1.25x max current draw (or one could say it should be 125% of max current draw). A 7.5 amp fuse would thus _imply_ a max current of 6 amps on that circuit. That assumes many things, but my point is that it’s unwise, IMO, to plan to load a circuit close to the amperage the manufacturer fused the circuit at. ""
The fuse is to protect the conductor feeding the device. So if it were a 14 guage wire, you can use a 15A fuse,
However the point you are making is that you should use a fuse 125% of the expected load is so you dont pop a fuse with peak inrush current that is close to the fuses's value. At some point the 6 A fuse would fail after being stressed multiple times. Can always use a fuse lower than the conductors rating, eg 7.5A for 6A load on a 14guage wire, instead of 15A.
Just mentioning not to fuse a circuit above the conductor's rating. If you use a 16 guage wire, you need to limit the current to 10A max eg.
The fuse is to protect the conductor feeding the device. So if it were a 14 guage wire, you can use a 15A fuse,
However the point you are making is that you should use a fuse 125% of the expected load is so you dont pop a fuse with peak inrush current that is close to the fuses's value. At some point the 6 A fuse would fail after being stressed multiple times. Can always use a fuse lower than the conductors rating, eg 7.5A for 6A load on a 14guage wire, instead of 15A.
Just mentioning not to fuse a circuit above the conductor's rating. If you use a 16 guage wire, you need to limit the current to 10A max eg.