Review on Electric Shower Head Heater - Funwill 110V-220V Automatic Electric Instant Hot Water Shower Head Heater with Wall Support/Tube - Mini-Showerhead Included (White) by Aaron Ayo

I have one of these things, no big deal. Wrong, first of all it's not adjustable to move up or down because that's really stupid. The big problem with this is that they don't tell you what to do to connect. Here's the thing: First, it uses a 50 amp single phase switch that I even knew was made. Next on the wiring, depending on how far you go from the switch box to the shower head will determine what size wire you need. There is a little sticker on the front of the shower head you don't even know it has amps for this shower head and the amps are the 49 amp it uses. That's a lot for this little thing, so you'll need 6 gauge stranded wire for the wire, it's the same as using commercial 8 gauge copper wire. fo 50 amps pulls 60 feet I think. It's been a while since I stopped remodeling and I'm out of books. You must check the National Electrical Code "NEC" as well as the Uniform Building Code "UBC" if you want to be compliant. So if you ask me, I wouldn't advise anyone to buy one of these. All I remembered was that they didn't even use the correct size wire for the device itself, but used 10 gauge stranded wire, which is rated for about half the amperage required.