keep in mind the printer that is drawing 10 amps is making the rest of the circuit voltage fluctuate and could cause some spiking on that circuit that you wouldn't see with the naked eye. now a ups for 10 amps is not going to be cheap. back to the printer if you were to put a amp probe on the circuit you would see it all over the place. definitely get it off the circuit with the pc if you have one. laptops are fine
Yep, no issues. I'm an MSEE, so I know how to use an ammeter. ;-) In fact, as I implied before, the thermal time constant on a residential breaker is slow enough at 133% rating (20A on 15A breaker) that it likely wouldn't even trip... most of the time.
The UPS sizing wouldn't be a huge issue, I'm used to dealing with them for my job, my HPC's all run on 2200VA units as it may take hours to safely shut down a simulation job during an outage. But you are right that it's not a very cost-effective solution, when I can just move the printer 20 feet an have an available circuit. Just the weight of those damn SmartUPS towers makes me groan, think two mid-sized car batteries in a steel ammo box, as that's basically what they are.
The initial question was generated before I knew there was an OEM WiFi adaptor available for this printer, as there was no Ethernet wiring to the nearest available free circuit, and really no easy way to get it there (thru a giant stone cooking fireplace). Once I found info on there being an available full-function WiFi adaptor, and then even found one used for $20 on ebay, all the other options became suddenly much less attractive!
So, the printer is being moved to the next room, as soon as that WiFi adaptor arrives. This did involve the construction of two new desks for that room, one permanent that won't be built until December (our Amish furniture maker is back-logged), and one temporary that I'm building in my own shop right now. But, even with the printer, the kids will now have a lot more space to work at their computer, as they've outgrown the desk I had built for them several years ago.
In fact, this opened up enough space on my own desk, that I might even consider getting them the color inkjet they've always wanted. I hate the damn things, when I need to rely on them actually working every time, but wouldn't mind having one as a second printer for the kids stuff. I do believe I have enough capacity on this circuit to run an inkjet, just not the 10 amp heaters in a business laser printer.