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I agree with 'bthomb' adding a ground rod accomplishes nothing as far as safty goes. But to BOND/ground the frame of the welder to the source as it should be, bonded, then the return path to the source will see a very low impedance path(to trip the breaker) and help reduce or prevent electric...

Skiier: The 25 Ohm value noted in the NEC applies to the maximum resistance for a single made electrode. If a higher resistance is obtained for a single electrode, a second(paralleled) electrode is required. This should NOT be interpreted to mean that 25 ohms is a satisfactory level for a...

unclesyd: Did you follow the 2002 NEC. An outside pole should not be a problem. But you only noted that you drove ONE ground rod the NEC requires there be 2 if you can not prove that you have the minimum resistance of 25 ohms to ground. If you drive two then you will be covered and will not...

I have some what of a dilemma, I was asked to do some analysis that involved Matrices. Ok fine . However I didn't have any reference material with me I put it of until tomarrow, since I havn't done Matrices since the middle of the Sixties ( the 1960s) and needed to 'whip out my circuits' book...

Yeah, this thread has taken on a life of its own, rms and effective values have been defined, restated and re-defined again. Maybe it could migrate to eigen values. ? WOC

Nostrayvoltage: My sincere apologies, I read the whole section and saw red, when someone said 'how do cow complain' and then melded your comment about OE. YOU are right I have not either heard of any legislation in Ohio pertaining to 'Stray voltage', and that is my whole point. When the...

Nostrayvoltage You mention that you have had much experience with farms and then turn around and ask how do the cows complain about stray voltage. they dont, their milk production drops off, then their weight goes down because they wont eat and if there are a lot of cows involved this can add...

Has anyone heard about new legislation, ie new state laws regulating Stray voltage ? I received from another site a letter about Wisconson writing new laws governing stray voltage, especially on dairy farms. I know this can be a problem but do we really need more government regulation...

Here is my 2-cents worth. I heard today that the "System" was only running at 75 % of capacity when the outage occured. I heard also today that our Electric Rate is going up( I live in Ohio, now) becuase they are NOW going to invest in new equipment. Why havent they built a new power...

Are my assumptions correct? Not completely. First, this a residence, the 180 va rule applies to commercial wiring not residential. The code does not consider a residence as having a continuous load. Since that is the case 1655 VA is not in excess of the circuit device. That said good practice...

Benray said: "The latest edition of the Soares Grounding Book,illustrates the many grounding methods that create two or more ground paths and points. I feel this book is incorrect and creating many inferior designs of ground systems, with objectionable current flow from interior and...

I wish to thank each and everyon who responded to my post, I never expected such a response. Since I am a new member I will always strive to live up to this high standard. Thanks again, everyone William O. Colt III

This is a two part question. The first although is not related to the second. 1. Where can I get the IEEE color Book Series ? and in which of the series is grounding(Residential/Commercial) covered? 2. In my area of Ohio anyway, the utility is doing away with the line fuses(aka, Line-cut...

Thanks BJC, for the reply. This is what I suspected but could never get a deifinitive answer. Years later I worked with the company who installed it, Reliance Electric and as I said no-body had a clue as to why it was done that way. As you said it was a well built system, it certainly was. The...

This question has been bothering me for 30 years. This was a Motor room. There was one 1000 hp synchronous motor, a 500kw generator(for main mill drive) and 2 250 kw generators one for each of the reel on a rolling mill. In 1972 we replaced the MOR's for Reliance drive paks, far cry from what...