....and again....see previous post....go figure:

https://en.wikipedia.org/wiki/Industrial_and_multiphase_power_plugs_and_sockets#/media/File:3phase-plug-exYU2.png

 

380 V Yugoslavian 5-pin 3-phase plug

 

and yes, dazzlenation...if the masons had coded themselves in as the wall etc etc....although in this particular instance, you are looking at the ceiling....as it goes, eh?

 

https://66.media.tumblr.com/8d9babbf5dc4b24ee6d1ca166458d730/536ff6b5e8a6c998-e3/s500x750/e1f32cc84a528f88aa4ab9501664a028d2d50b40.gifv

 

https://mary2point5.tumblr.com/