I've got a bunch of lamps from Europe that I want to use where we've just moved in North America. I cut off and replaced the plug on one lamp with a North American one and it works fine. I'll be doing the others. But I have an air purifier that works completely fine at 110/220V and 50/60Hz. It only uses a two prong plug. Is that likely just as easily replaceable/modifiable as lamp cables or are there gauges of wire to consider, amounts of power, different ratings of two-prong plugs, etc etc?
Electrical – Any two-prong plug on any two-prong plug cable
electrical
Related Solutions
You'll simply have to purchase a 4 prong dryer cord, which can be found at any local hardware store or big box store.
Then follow the dryer manufacturers installation instructions for connecting a 4 prong plug.
Most dryers will be wired similarly to the one described in this answer, though it could vary a bit from manufacturer to manufacturer.
This is an obsolete socket type called a parallel and tandem socket, and is designed to accept either standard parallel plugs without a ground or older tandem style plugs (again without a ground):
None of the connections is a ground - it consists of 2 pairs of hot and neutrals, one oriented vertically, the other horizontally. If there is a ground wire to the box (which I doubt), this can be replaced with a standard 3 prong outlet. If not, you'd have to find a way to get a ground into the box.
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Best Answer
First, I really don't advocate splicing new plugs onto old wires unless you really know what you're doing. Many of these devices likely have UL listings, which help ensure their safety in a residential context, but which also depend on the system as a whole, unmodified.
If the device says 110-240VAC and 50/60Hz, then you can simply use a plug converter, no need to splice.