Pipes and fittings: https://www.viega.ru/ru/ru/products/Katalog/Truboprowodnyje-ssisstjemy/Fitingi-pod-pajku.html 

Retro sockets and switches: http: //gusev.rf/? Page_id = 192

All elements are ideally joined to the center point.
The designer allows you to assemble the wiring of any complexity for any form of walls and ceilings.
Sockets and switches can be combined as you like.

Who works in the V-Ray version lower than 3.1 be careful in some materials in the BRDF section there is a Microfaset GTR (GGX) if your version is older than 3.1 then the BRDF field will be empty. Choose Blinn Phong or Ward – which is preferable to you.

Objects have the correct scan.