Heh, well, Texas hasn't become the entire USA yet, unless something happened overnight to change that. Texans may have to return all their Corningware and other cookware, though, since it too could perform some of the functions of facilitating manufacture of drugs. Gotta love Gov'ment.
@zeeglen: The primary reason for the co-existence of (to use the official names) 117 and 234 VAC residential wiring is that the absolute maximum load supported by ANY 117 VAC outlets and other wiring devices is IIRC 30 amperes. That's a nominal load maximum of ~3.5KW, and the devices for that current level are intentionally incompatible with "standard" 2 or 3 prong plugs.
Recent editions of the National Electrical Code (NEC) specify 20 amperes as the standard breaker rating for household branch circuits for outlets (even though the usual individual plugs and sockets are rated for 15 AAC).
BTW, I think that the "official" domestic outlets in Japan are supposed to be 100VAC nominal (just to be different).
Re; using an electrical appliance while standing in a puddle or lying in a bathtub...."
There are much more likely places where use of hand-held tools, appliances, etc are common and there is a REAL danger of shock are basements and garages! That's why they too are required by NEC to have GFI.
Stoves and ovens too. I think that 1 of the 2 phases is sent to most other household outlets is because it is a bit safer, 110VAC is less likely to kill someone who accidentally comes into contact with a live wire than 220VAC.
Of course one side of the 220VAC to ground is still 110VAC. I believe that in Japan neither side of the 110VAC is grounded, which is probably safer all around, in the days before GFI less chance of getting killled when using an electrical appliance while standing in a puddle or lying in a bathtub.
@davud: In the USA, most clothes dryers require 220VAC! Less than 12 Amps. Likel;y true elsewhere, as 220 V seems to be more of a global standard for residential use for everything (except for Japan....).
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Are the design challenges the same as with embedded systems, but with a little developer- and IT-skills added in? What do engineers need to know? Rick Merritt talks with two experts about the tools and best options for designing IoT devices in 2016. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.