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The Brother laser printers might draw more power on the initial surge than other laser printers, I don't really know. But all laser printers have a big power spike when they first fire up so if your circuit can't handle the Brother, it might not be able to handle other lasers either.
The other thing is a Kill A Watt probably won't accurately read the surge because it's too brief. It has to last at least a second or so for the Kill A Watt to show a solid number.
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look, if the printer is wireless, then put it where it can get the proper power, like close to the circuit breaker panel, or in the basement. some location where it can have it's own circuit.
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Yeah, the Brother lasers do tend to have a solid surge when the fuser first starts to warm up. Some other makes include a current limiter and/or thermistor in the fuser unit heater to keep the inrush current from being quite so bad, but those do slow down the heating up to operating temperature. I used to have access to a circuit monitor with more sensitivity than the Kill-A-Watt meters. The wake up current draw on my Brother HL1670N could exceed 9 A, but it lasted for only about 50-100 ms before dropping back to the listed max draw. Lesser spikes would occur as the heating element cycled on and off to maintain temperature. It is one downside to Brother lasers, they keep the design simple and basic, and tend to be more reliable without some of the bells and whistles of other designs. But they can be harder on the electrical supply.
