Hi to all,
I understand Ohms law in theory, I=V/R. I have tested a fan I have salvaged from an old boiler using some flex, with a 3 amp fuse fitted into the plug (same rating fuse would be in boiler). All is fine and fan works. 240V is going to the fan and the fan has a resistance of 40 ohms.
According to ohms law this gives a current of 6 amps! Why dosent the fuse blow? Also if this was in a boiler there would be a 2 amp quick blow fuse fitted making it more likely to blow! I understand that fuses must have some tollerence but logic tells me it woudnt reach 6 amps or have I missed something.
Thanks for any help in advance
I understand Ohms law in theory, I=V/R. I have tested a fan I have salvaged from an old boiler using some flex, with a 3 amp fuse fitted into the plug (same rating fuse would be in boiler). All is fine and fan works. 240V is going to the fan and the fan has a resistance of 40 ohms.
According to ohms law this gives a current of 6 amps! Why dosent the fuse blow? Also if this was in a boiler there would be a 2 amp quick blow fuse fitted making it more likely to blow! I understand that fuses must have some tollerence but logic tells me it woudnt reach 6 amps or have I missed something.
Thanks for any help in advance