Noise for the electronics.

[Jpflex]

if you buy the special receptacle listed for isolated ground it should have a triangle symbol on it.

Yes your equipment’s ground conductor to the receptacle should be isolated / no connection from the receptacle box and it’s bonding to normal EGC system such as through EMT raceway conduit if used. I only had to run two circuits with an isolated ground once for a laboratory containing a particle analyzer and plasma computer system.

In one of my grounding books it said a non conductive connector could be used to interconnect the raceway and receptacle box, I guess this takes the exemption of having to bond small sections of conduit or equipment only used for the support or protection of wires or devices

 

[infinity]

In one of my grounding books it said a non conductive connector could be used to interconnect the raceway and receptacle box,

If the box is metal it still needs to be connected to an EGC so I'm not seeing what the purpose of using a small section of nonmetallic raceway would accomplish. FWIW I have seen this on a job spec for an AV system in a theater.

 

[jim dungar]

Years ago, when I did RS422 stuff, I found dedicated ground wires, from a common point, were almost as effective as completely isolated ground. The big problem was the daisy chained non-copper paths through enclosures and building steel. The parallel copper path seems to be sufficient for most control panels.