Minimum Clearance between Low voltage cables and power cables

[Anwar Pasha]

What is the minimum clearance either horizontal or vertical clearance needed between the low volatge and power cables noting both of them are on different cable trays.

 

[kingpb]

Typically dictated by working space needed. Horizontal you probably don't want less that 1ft from top of lower tray to bottom of tray above it.

 

[jdsmith]

API 552 is a petrochemical industry standard that addresses separation. It is fairly conservative, but it is the only document I have found covering separation distances.

 

[petersonra]

This is a design consideration, not a code requirement.