Intrinsic Safety Grounding

[blackwed]

I am working on a control system at a 350 acre petroleum storage/distribution facility. ISA RP12.06, et al, seem to require that I run separate Intrinsic Safety ground conductors all the way back to the ground point for the facility’s main power service from each tank (literally miles of wire) where we are installing an intrinsically safe gauging probe. Is this correct?

DB

deja moo: I've heard that BS before.

 

[jsummerfield]

The current standards include ANSI/ISA-12.02.01-2002 (IEC 60079-11 Mod) - Supersedes ISA-12.02.01-1999 (IEC 60079-11 Mod); Electrical Apparatus for Use in Class I, Zones 0, 1, & 2 Hazardous (Classified) Locations - Intrinsic Safety "i"

and

ANSI/ISA-RP12.06.01-2003
Formerly ANSI/ISA-RP12.06.01-1995 (R2002) Recommended Practice for Wiring Methods for Hazardous (Classified) Locations Instrumentation Part 1: Intrinsic Safety



John