The whole line is dangerous. Often from something like a window AC or portable heater added to to same outlet as room lighting and a TV or computer. The AC or heater is already near the maximum current for the line, usually 1400 watts. If you feel the outlets or wire in the walls they will be warm or hot. We have a lot more stuff plugged in than the era when most houses were built. Any connection issues can cause further problems. The wall outlet and circuit breaker are common. If your lights start flickering at all, you need to find the issue quickly. That isn’t always going to happen, but in many cases flickering lights are a sign of the problem.
The whole line is dangerous. Often from something like a window AC or portable heater added to to same outlet as room lighting and a TV or computer. The AC or heater is already near the maximum current for the line, usually 1400 watts. If you feel the outlets or wire in the walls they will be warm or hot. We have a lot more stuff plugged in than the era when most houses were built. Any connection issues can cause further problems. The wall outlet and circuit breaker are common. If your lights start flickering at all, you need to find the issue quickly. That isn’t always going to happen, but in many cases flickering lights are a sign of the problem.
Yep. All the way down to backstabbed outlets (which should be against code but isn’t, at least in the NEC).
While this is true, most of the devices we use today are DC devices and much lower power. Your standard USB device is maybe 5V and 2A, so only 10W.