1,800 watt for periods less then 3 hours and 1,440 watts for continuous loads over 3 hours.
Realistically, a 15A breaker won’t trip on a 2,300 watt load for at least a few minutes, and often not until a few hours. A listed breaker is expected to trip in several seconds to 3 minutes for a 3,600 watt continuous load.
Take all those numbers and go up by 33% for a house or apartment with 20A circuits (quite common). Go up by 667% for an oven plug.
As anyone who takes care of rentals during winter knows, a typical circuit can tolerate two 1,500 W space heaters without tripping very much (although this is unsafe and a bad idea).
Sorry, I was doing conservative napkin math, better safe than burnt to a crisp, as grandpa NEVER said... I'm currently having to rewire a lot of the house that he built and I bought so he could retire. There have been a lot of electrical issues that the inspection never found.
He hated outlets, and hardwired almost every appliance directly into whatever circuit was closest that fit the amperage, including literally cutting the plug off a cord, to nut the wires directly into the Romex.
I still haven't found what circuit my range hood is on. I turned off all 120V and it remained blowing, and knowing grandpa, he powered it off a single leg of a 240V. And I know he didn't use junction boxes, so the splices are likely all inside the walls.
Realistically, a 15A breaker won’t trip on a 2,300 watt load for at least a few minutes, and often not until a few hours. A listed breaker is expected to trip in several seconds to 3 minutes for a 3,600 watt continuous load.
Take all those numbers and go up by 33% for a house or apartment with 20A circuits (quite common). Go up by 667% for an oven plug.
As anyone who takes care of rentals during winter knows, a typical circuit can tolerate two 1,500 W space heaters without tripping very much (although this is unsafe and a bad idea).