Hi, On Friday, May 03, 2019 03:00:05 +1000 Michelle Sullivan <michelle at sorbs.net> wrote:>>> I am sorry to hear about your loss of data, but where does the 11kV come from? >>> I can understand 415V, i.e. two phases in contact, but the type of overhead >>> lines in the pictures you reference are three phase each typically 240V to >>> neutral and 415V between two phases. >>> >> Bottom lines on the power pole are normal 240/415 .. top lines are the 11KV distribution network. > > Oh and just so you know, it?s sorta impossible to get 415 down a 240v connectionNo it is not. As I said, if two phases come into contact you can have 415v between live and neutral. Best wishes, Nick. --
Michelle Sullivan http://www.mhix.org/ Sent from my iPad> On 03 May 2019, at 03:18, N.J. Mann <njm at njm.me.uk> wrote: > > Hi, > > > On Friday, May 03, 2019 03:00:05 +1000 Michelle Sullivan <michelle at sorbs.net> wrote: >>>> I am sorry to hear about your loss of data, but where does the 11kV come from? >>>> I can understand 415V, i.e. two phases in contact, but the type of overhead >>>> lines in the pictures you reference are three phase each typically 240V to >>>> neutral and 415V between two phases. >>>> >>> Bottom lines on the power pole are normal 240/415 .. top lines are the 11KV distribution network. >> >> Oh and just so you know, it?s sorta impossible to get 415 down a 240v connection > > No it is not. As I said, if two phases come into contact you can have 415v between > live and neutral. > >You?re not an electrician then.. the connection point on my house has the earth connected to the return on the pole and that also connected to the ground stake (using 16mm copper). You?d have to cut that link before dropping a phase on the return to get 415 past the distribution board... sorta impossible... cut the ground link first then it?s possible... but as every connection has the same, that?s a lot of ground links to cut to make it happen... unless you drop the return on both sizes of your pole and your ground stake and then drop a phase on that floating terminal ...> Best wishes, > Nick. > -- > > > _______________________________________________ > freebsd-stable at freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe at freebsd.org"
Hi, Reference:> From: "N.J. Mann" <njm at njm.me.uk> > Date: Thu, 02 May 2019 18:18:16 +0100"N.J. Mann" wrote:> Hi, > > > On Friday, May 03, 2019 03:00:05 +1000 Michelle Sullivan <michelle at sorbs.net> wrote: > >>> I am sorry to hear about your loss of data, but where does the 11kV come from? > >>> I can understand 415V, i.e. two phases in contact, but the type of overhead > >>> lines in the pictures you reference are three phase each typically 240V to > >>> neutral and 415V between two phases. > >>> > >> Bottom lines on the power pole are normal 240/415 .. top lines are the 11KV distribution network. > > > > Oh and just so you know, it???s sorta impossible to get 415 down a 240v connection > > No it is not. As I said, if two phases come into contact you can have 415v between > live and neutral.With 3 phase: - 415 between each of the 3 live phases - 240 between neutral & the 3 live phases (To visualise: draw a circle of radius 12 cm, mark off dots on circle at 120 degrees. measure between dots: 20.75cm, Neutral is compass hole in paper ) PS UK/Britain was nominal 240V, but EU inc UK is now nominal 230V +10%/-6% https://en.wikipedia.org/wiki/Mains_electricity#Standardisation Cheers, Julian -- Julian Stacey, Consultant Systems Engineer, BSD Linux Unix, Munich Aachen Kent http://stolenvotes.uk Brexit ref. stole votes from 700,000 Brits in EU. Lies bought; Campaigns fined; 1.9 M young had no vote, 1.3 M old leavers dead.