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	Subject - article 250.36 veganfan High-Impedance Grounded Neutral Systems? Other than having a resistor between grounded conductor and grounding conductor. Can any one explain exactly what this system is, and what reasons you would use it? Any examples of some that I could relate to? I have yet to encounter any of these systems, and there fore unfamiliar with them. Ryan_J The high impedence grounded system is a little bit safer than an ungrounded system, but offers many of the same benifits. When there is a ground fault and fault current returns on the nuetral back to the source, it hits a resister that decreases the fault current to about 5 amps, and therefore the breaker doesn't trip. When this happens a ground detector alarm goes off, alerting the people to a ground fault that they need to take care of, the object being to take care of it before a second fault occurs and creates a short circuit between the two phases that have faulted. This system is used for place where having a (main) breaker trip is not acceptable, such as large manufacturing places and internet service providers. Does that make any sense? lctrc789 A good example would be AOL where they service large networks and computers. Another example would be some large manufactures that use 480 volt systems stricly for equipment that cannot be shut down like pumps, motors etc. A crew will go out and find the problem before they have a major shutdown, so they don't lose the entire system. Hope this has helped some. veganfan Thanks this has helped a lot.