I live in the U.S. in a townhome (not free standing) built in 2012.
I want to put a laser printer in the laundry room and use the outlet currently occupied by the washing machine. It's a designated circuit for the washer; the double-pole breaker in the box is 30A. — I'm sorry, I have no idea where I got the idea it was a big breaker like that, I must have been looking at the dishwasher breaker and got it confused.
The washing machine circuit is 20A, single pole.
The sticker on the washer says it's 10A 120V 60Hz.
The laser printer says it's 110-120V, 50/60Hz and 9A.
It's a standard U.S. 3-prong outlet with a little notch off the left prong (which is not used by the washer).
So, can I just use a standard outlet splitter or do I need to consider the power draw or some other effects?
Best Answer
Washing machines require dedicated circuits. This code excerpt implies that the only receptacle available for a washing machine should be the one that the appliance itself is plugged into.
Source: 2008 NEC, the latest version I have, but I know this requirement has not changed meaningfully since then.
In general, any high-powered AC motor or electrical heating element (washing machine, refrigerator, garbage disposal, dishwasher, microwave, etc.) should be on a dedicated circuit. These tend to draw a lot of amps, and AC motors spike above their typical current draw when starting because they have to charge some pretty big capacitors. For example, an AC motor that draws 12 amps might spike at 18 amps when starting. If you already have a load on that circuit, you may trip a breaker (maybe not - they do not necessarily trip because of a momentary spike - and the circumstances that cause them to trip is a little more complex. Best not to tempt fate).
The correct thing to do here is one of the following: