Years ago, fuses were all that were used in residential wiring, and they weren't the tamper-proof type you can get today.... they were all Edison-base.
When home were first wired with electricity, there were only one or two 120V circuits in the whole house. And that was fine, even with 15amp fuses, because there was only one or two receptacles on each floor, and half a dozen light bulbs.
As time went on, RCA Victor came out with the Victrola record player. Radios became all the rage, and 15a breakers wouldn't hold, so everyone stuck in a 20.
Then came color TV, vacuum cleaners, washing machines..... and the 20 wouldn't stay on, so Dad just took it out and spun in a 30.
Pretty soon, hair dryers, microwaves, home entertainment centers and big-screen TVs hit the market, and the 30 wouldn't hold. But you couldn't get a fuse bigger than a 30, so you would put a penny in the fuse box.
Now, what is the ampacity of a penny?
It has one.... really.
It's right above Lincolns' head. Check for yourself.
When home were first wired with electricity, there were only one or two 120V circuits in the whole house. And that was fine, even with 15amp fuses, because there was only one or two receptacles on each floor, and half a dozen light bulbs.
As time went on, RCA Victor came out with the Victrola record player. Radios became all the rage, and 15a breakers wouldn't hold, so everyone stuck in a 20.
Then came color TV, vacuum cleaners, washing machines..... and the 20 wouldn't stay on, so Dad just took it out and spun in a 30.
Pretty soon, hair dryers, microwaves, home entertainment centers and big-screen TVs hit the market, and the 30 wouldn't hold. But you couldn't get a fuse bigger than a 30, so you would put a penny in the fuse box.
Now, what is the ampacity of a penny?
It has one.... really.
It's right above Lincolns' head. Check for yourself.