Electrified Water Shower or Bath possible?
If you will remember about 16 years ago during the gulf wars, an article came out about several military men were electrocuted while taking a shower. So yes you can be electrocuted in your shower. In you example you point out a violation of the 2017 NEC. Articles 210.2(A)(4) Bonding of Electrical Conductive Materials and Other Equipment &amp; (5) Effective Ground-fault Current Path. Basically these two articles state: All metal parts of a water system must be bonded back to the Grounding System. I know you could say something like &quot;there is no way my metal shower head could come into contact with electricity so why bond it?&quot; I can't say since that is something you should take up with your local AHJ. I can say follow the NEC.

2017 NEC Article 210.52(B)(1) Exception 2 does allow a non GFCI receptacle for a refrigerator, but it cannot violate other parts of the NEC. The most commonplace being, it must be a separate circuit dedicated to the appliance, it must be at least 8' from water and it cannot be in the garage. It does not eliminate AFCI devices.
Hope this helps