On Wednesday, May 30, 2012 11:15:38 PM fritz did opine: > On 05/29/2012 12:07 PM, andy pugh wrote: > > On 29 May 2012 17:00, John Thornton<bjt...@gmail.com> wrote: > >> N to each X is.1 ohm > >> X to X is .2 ohm > > > > That sounds like the tapping you needed. > > > > I would say earth it, put on rubber boots, rubber gloves and operate > > the machine with a long, dry stick :-) > > As an electrician, I should now interject that a neutral should only be > bonded at the point of distribution (the breaker panel or upstream > transformer). Grounding a neutral anywhere else makes for strange > problems and stray currents on the ground. People often falsely assume > electricity takes the path of least resistance - according to Ohm's law, > it follows ALL paths in a parallel circuit. > Yup, and the sum of the measurements can easily exceed 100% due to those circulating currents.
> But hey, it's your cat and you can pick it up by the tail if you want. Chuckle, that's one I hadn't heard in years. ;-) Those of us reasonably familiar with the NEC do try to keep the others from getting crispy crittered, fairly often in fact. However, bear in mind that an electricians card, while good, isn't the top of the ladder. Neither is my C.E.T. card, but I have been following folks for 64 years who thought they were electricians, some even had the card, but it didn't stop them from doing it by rote, and wrong, usually with 3 phase power in the mix. As a retired television engineer, I've dealt with 3 phase systems on a daily basis since 1964. As I've migrated jobs over the years I have had to fix 3 phase stuff I inherited that local electricians built, some of which were real doozy's. I wired a house my father built when I was 13 (1947-8), on a trip back west in 2007 I stopped and intro-ed myself to the folks living in it now, and they confessed that they had finally replaced the 6 pack of plug fuses I had wired into it in 1947-8, in 2005 with a used 100 amp meter & box. They weren't driving new cars either... It also hadn't burned, no alu wire anyplace in it. Stick around, the conversations here can get genuinely interesting. ;-) Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> I can mend the break of day, heal a broken heart, and provide temporary relief to nymphomaniacs. -- Larry Lee ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
