Wildcrib

Let’s say you wanted to buy an 800-Watt heater, that plugs into a regular north American plug in of 120 Volts. How do you know it’s not going to blow the fuse?

You’ve got all the number to figure it out.can a 15amp fuse handle an 800watt heater

Let’s do some quick math to figure it out!

1. Your Watts the heater is an 800 Watts heater, that’s your POWER.
2. Your Plug in outlet typical, 120 Volts
3. Your Amps, the fuse is 15 Aps that’s the CURRENT you’re pushing through the line.

Here’s what you do.

Watts/800 (divided by) Volts 120 = 6.7 Amps needed.

So, your 800-watt heater would draw about 6.67 amps. Since this is well below the 15-amp rating of the fuse, it should be able to handle the heater without any issue.

So the maximum you could plug in without tripping the breaker would be 1,800 Watts. But that means you couldn’t plug anything else on that line. Which might be 1 or 2 different plugins.

However, always ensure that other devices on the same circuit don’t push the total current above the fuse’s rating. If in doubt, it’s always best to consult with a licensed electrician.