Answer
Aug 13, 2024 - 10:32 AM
Yes you need to provide fuses for this charger. Since it connects to a battery at each end of the circuit you will need a fuse for each end. The fuse should go as close to the battery as possible. Since the Orion is expected to pass 50 Amps your fuse needs to be bigger than that, otherwise it would always be on the verge of blowing. I suggest somewhere in the region of 75 amps would be appropriate, We have lots of fuse holders and fuses in that range but here are a few suggestions:
Terminal Fuse: You can use the Blue Sea 5191 fuse block and a Blue Sea 5180 Terminal Fuse 75 Amp
ANL Fuse You can use the Blue Sea 5005 fuse block and a Blue Sea 5124 ANL Fuse 80 Amp
Midi Fuse. You can use the Blue Sea Systems 7720 Safety Fuse Block for AMI or MIDI fuses and the Blue Sea 5254 Fuse MIDI 70A
Since the job of the fuse is to protect the wire you then have to make sure your wire can carry 70-80 amps as shown in the Ampacity Table. That means 8 awg wire is the minimum, but normally in DC circuits we do more than the minimum. The Orion can accept up to 4 awg.
Terminal Fuse: You can use the Blue Sea 5191 fuse block and a Blue Sea 5180 Terminal Fuse 75 Amp
ANL Fuse You can use the Blue Sea 5005 fuse block and a Blue Sea 5124 ANL Fuse 80 Amp
Midi Fuse. You can use the Blue Sea Systems 7720 Safety Fuse Block for AMI or MIDI fuses and the Blue Sea 5254 Fuse MIDI 70A
Since the job of the fuse is to protect the wire you then have to make sure your wire can carry 70-80 amps as shown in the Ampacity Table. That means 8 awg wire is the minimum, but normally in DC circuits we do more than the minimum. The Orion can accept up to 4 awg.
