Lee wrote - I have many, holding down the basement floor How novel, so I if you ever want to move your house all you have to do is remove the transformers?
Best regards, Rush Dougherty TucsonEV www.TucsonEV.com > -----Original Message----- > From: EV <ev-boun...@lists.evdl.org> On Behalf Of Lee Hart via EV > Sent: Monday, March 11, 2024 12:42 PM > To: Electric Vehicle Discussion List <ev@lists.evdl.org> > Cc: Lee Hart <leeah...@earthlink.net> > Subject: Re: [EVDL] OT Solar Electrical Issues (was: Adding a 14/50 EV > courtesy > outlet to a solar array) > > Cor van de Water wrote: > > my garage has a GFCI circuit. As a consequence, I cannot use my garage > > to do any development work, because as soon as I plug in one of my HP > > power supplies, even before I turn it on, the heavy capacitive > > filtering on the AC line will trip the GFCI because it indeed creates > > a current to ground. > > The easy answer is a big isolation transformer. I have some big 1KW ones that > I > use. (If anyone needs one, I have many, holding down the basement floor). > > > If I am not mistaken, the NEC has a class of GFCI (and I used to have > > a breaker) that trips at 50mA, I believe there is even a 500mA limit. > > The original idea for a GFCI was safety; to keep people from being > electrocuted > (i.e. junior sticks a fork in the toaster with one hand to get his bread out, > while the > other hand is resting on the grounded sink. The 5mA limit was chosen as the > maximum current that a normal healthy person would survive, since they can let > go and jump away from the source of the shock. In medical settings, an even > lower > limit of 0.5mA was required, on the basis that hospital patients may well not > be > able to remove themselves from the source of the shock. > > But these limits proved to be hard to design for. So manufacturers have > lobbied > for > higher limits of 50mA. That's more than enough to kill a person. Yet the last > I > knew, our EVs are being designed to allow up to 50mA of ground leakage before > their GFCI trips. > > 500mA for a GFCI limit? Gah! That would not only kill someone, but *cook* them > as well! > -- > Excellence does not require perfection. -- Henry James > -- > Lee A. Hart https://www.sunrise-ev.com > > If I am not mistaken, the NEC has a class of GFCI (and I used to have a > breaker) > that trips at 50mA, I believe there is even a 500mA limit. > This is only used in industrial settings where a lower limit will indeed trip > guaranteed. > > On Mon, Mar 11, 2024 at 10:50?AM (-Phil-) via EV wrote: > > > > Keep in mind that excepting North America, only (part of) Japan uses a > > lower voltage. In the US (residential) system, no conductor is ever > > over about 160v peak-to-peak with respect to ground, whereas in NZ/EU > > you are getting over 300v P-P, which is arguably 4 times more lethal. > > I'd definitely want everything protected by GFCI/RCD if I had those > > voltages everywhere. > > > > On Mon, Mar 11, 2024 at 10:25?AM EV List Lackey via EV > > wrote: > > > > > On 10 Mar 2024 at 23:41, (-Phil-) via EV wrote: > > > > > > > Based on what I know, [the US NEC is] one of the most rigorous > > > > codes in the world. > > > > > > Agreed. I've seen some ... interesting ... wiring practices > > > elsewhere, including Spain, Italy, France, Canary Islands, Puerto > > > Rico, and South Korea. > > > > > > Some of them look like old USA practices. Example: junction boxes > > > aren't usually used for surface mounted luminaires in France. The > > > cable or smurf tubing emerges from the ceiling or wall. > > > > > > I've seen single conductors run through ceramic cleats on the > > > ceiling surface in South Korea, similar to early 20th century US > > > wiring. It appeared to be a recent installation. > > > > > > Service capacities are also lower. A typical western EU service will > > > be 6kW or 12kW, a size the US hasn't seen in probably 70 years. > > > Spain has a lot of 3kW services. I'm sure that that's a problem for > > > EV home charging there. > > > > > > On the other hand, as Bill says about NZ, in most (all?) western EU > > > nations, the whole house is GFI (RCD) protected at 30ma leakage > > > current. > > > > > > David Roden, EVDL moderator & general lackey > > > > > > To reach me, don't reply to this message; I won't get it. Use my > > > offlist address here : http://evdl.org/help/index.html#supt > > > > > > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > > > = > > > > > > Interpreter: One who enables two persons of different languages to > > > understand each other by repeating to each what it would have been > > > to the interpreter's advantage for the other to have said. > > > > > > -- Ambrose Bierce, "The Devil's Dictionary" > > > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > > > = > > > > > > _______________________________________________ > > > Address messages to ev@lists.evdl.org No other addresses in TO and > > > CC fields > > > HELP: http://www.evdl.org/help/ > > > > > > > > -------------- next part -------------- An HTML attachment was > > scrubbed... > > URL: > > _______________________________________________ > > Address messages to ev@lists.evdl.org > > No other addresses in TO and CC fields > > HELP: http://www.evdl.org/help/ > > > _______________________________________________ > Address messages to ev@lists.evdl.org > No other addresses in TO and CC fields > HELP: http://www.evdl.org/help/ > > > > _______________________________________________ > Address messages to ev@lists.evdl.org > No other addresses in TO and CC fields > HELP: http://www.evdl.org/help/ > > > > -- > This email has been checked for viruses by AVG antivirus software. > www.avg.com _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
