# Circuit breaker for single outlet

I have several 3d printers. One of them keeps tripping the breaker for the room. I'm trying to debug (obviously will not use it regularly until I can determine what is wrong) but in the mean time I need to keep my other printers running.

A power strip's breaker isn't enough for it to trip, so it's drawing less than 15 amps when it spikes. It also draws 50 watts when just running normally. The breaker for the room is 20 amps, but I'm running an AC and various other appliances as well. The combination is what causes it to trip the 20 amp. It's absolutely not the AC causing it to trip. I have eliminated variables and it's one of the 3d printers for absolutely certain.

I'm guessing I need between a 3 and 5 amp resettable breaker, one that works for a single outlet only. 120V.

Where can I buy such a breaker?

Would be even nicer if I could switch between a few different preset values, ie, 3 amp, 4 amp, 5 amp, etc.

My workshop only has one circuit, just how the building is set up. (rather each room has one circuit, I only have access to the room I pay for)

• heaters are regulated slowly so when all are on, these can peak your drain – Tony Stewart Sunnyskyguy EE75 Aug 30 '17 at 22:33
• You have $20\:\textrm{A}$ for the entire room. I think you said that you tested one printer to make sure that it is below $15\:\textrm{A}$. But you admit there are other printers and other devices in the room. The room breaker will trip when the total exceeds its limit. You will have to run fewer devices. You cannot "ADD" a breaker inside the room in order to add to the compliance limit of your room's breaker. That's just silly. I think you want a better service. Find another room with a higher compliance capacity for your equipment. – jonk Aug 30 '17 at 22:42
• I think you are misunderstanding. I am running servers and such that total 7 amps or so. All printers total are below 15 amps also, ie, the power strip doesn't trip. But when the printers hit 14 amps, that is more than 20 so the room blows. I want each printer to shut off on its own if it pulls more than 3-5 amps. The 20 amp capacity of the room is not relevant as if any printer pulls more than 3-5, it's faulty. – user161487 Aug 30 '17 at 22:47