Yes, that installation is ugly, but 2 issues:
1: Make sure there is a GFCI with proper connections to the internal=20
electrical parts of the unit. I believe the NEC (USA electrical code)=20
would require that, as electrical outlet within arms reach of a water=20
source.
2: Make sure that the unit has a very good ground. That plastic pipe can=20
be assumed as zero ground. It used to be that water supply pipes were=20
steel then copper (before that lead) which were connected to a metallic=20
underground pipe which provided an excellent ground everywhere there was=20
a water pipe! Today, there are plastic pipe, water meters (have seen=20
heavy bare copper ground wire jumpering around), valves and other=20
devices. And don't forget di-electric unions at hot water tanks. All=20
these interrupt the ground circuit where I don't think   one could trust=20
any pipe anymore. Think about in an older installation, pipe leaks,=20
repair is with plastic pipe as quick, and inexpensive.

--=20
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