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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: Grounding..... posted by Todd Krieger on April 2, 2007 at 05:32:35:
Todd:Are you referring to page 8 (isolated ground?)
This is done all of the time with instrumentation panels - a separate ground grid (multiple interconnected rods) is used for a ground with less noise on it. The ground conductors are insulated and the ground busses themselves are isolated from all other metal parts normally connected to the system ground.
It's only dangerous if not done properly. Grounds can be tested (by a qualified person) with a simple GPR (ground potential rise) test.
We do this in industry all the time.
The trick is to use insulated (green) wire for the isolated ground, and NOT connect the Romex ground to the isolated ground wire coming from the separate ground electrode or the receptacle ground. Just cap it off like the picture shows.
Of course, have all residential installations inspected by a qualified electrician and approved by your local electrical regulatory authority (inspection branch)!
Cheers,
Presto
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Follow Ups
- Are you referring to... - Presto 09:34:06 04/02/07 (5)
- Re: Are you referring to... - Todd Krieger 23:45:15 04/02/07 (4)
- Re: Are you referring to... - Presto 11:57:14 04/03/07 (3)
- Re: Are you referring to... - gbeard 12:01:55 04/04/07 (2)
- It makes a very interesting statement about separate ground rods too!! - Presto 12:41:45 04/04/07 (1)
- FWIW, acording to BOTH articles, it's a code violation. (nt) - Presto 13:53:02 04/04/07 (0)
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