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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: Re: It would appear that EVERYBODY has missed the most important item. posted by jneutron on November 6, 2006 at 07:45:28:
I have spent many years writing specifications for the installation and acceptance testing of isolated ground systems in which there are no power distribution ground loops. Of all the hair brained ideas I've seen or heard proposed to cope with grounding problems, this is the least unacceptable to me because it only involves a waste of money, not an actual increase in risk of injury or noise. Neither I nor any electrician I've spoken with has ever seen a problem solved by converting to isolated ground. BTW, signal ground loops are a real problem in very large buildings such as megastructures and in industrial campus environments where LANs are spread out over a very large physical area. The extremes some people would go to is mind boggling. Certain utilities are exempt from NEC in those facilities and installations which deal specifically with their own services and are free to set their own standards. I think among them are the Phone, cable, and electric companies and electrified railways. That being said, I can tell you from experience that the Bell system adopts NEC at least officially chapter and verse. Whether they actually comply in all of their installations in another matter entirely.
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Follow Ups
- Re: It would appear that EVERYBODY has missed the most important item. - Soundmind 12:25:59 11/06/06 (1)
- Re: It would appear that EVERYBODY has missed the most important item. - jneutron 12:39:54 11/06/06 (0)
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