International Standards 1

[kskarpas]

Hi I am looking if there is any international standard for the following issues:

1. distance between power cables (depending the voltage), instrument cables, fiber optic cables etc
2. depth of buried cable depending the cable specs
3. permissible sound levels for generators depending the distance/area near by
4. lux level categories depending the usage of the room (design room, workshop, storage room etc)

thank you in advance

 

[7anoter4]

For 1 and 2 items, in my opinion, there are only national standards recommendations as for instance :
NEC [USA] National Electric Code NFPA-70
NESC National Electric Safety Code [ANSI C2]
U.K.MINISTRY OF DEFENCE Spec.034 Electrical Installations[according to BS7671]
For recommended lux level see [for instance]:

https://www.wbdg.org/pdfs/usace_lightinglevels.pdf

Sound level permissible limits are recommended by OSHA. For instance see:

http://www.engineeringtoolbox.com/noise-exposure-level-duration-d_717.html