Hi Bob
The normal mains supply to houses and offices is 230 volts ac at 60 amps. 50
Hz. For large industrial machines in factories they would normally have a 3
phase 440volt AC/50 Hz supply.
Some private properties do have a 3 phase supply if required for small
garage industries or hobbies like lathes etc
The normal houshold 230v appliance cord/lead is BROWN LIVE, BLUE NEUTRAL and
GREEN/YELLOW EARTH.
Some appliances like hoover carpet cleaners, plastic encased have 2 wires ie
BROWN LIVE, BLUE NEUTRAL and no earth.
The plug to the mains socket is clearly marked when you make a cord/lead
connection so the wires do not get crossed over and the plug is non
reversible.
The 3 pin plug contains a fuse always in/to the live pin.
It is a straight forward safe procedure avoiding crossed Live and Neutral
wires.
In EU the supply is normally 220 v but might vary in different countries.
De mal/g3kev
----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Monday, October 10, 2011 3:15 PM
Subject: Re: LF: mains wires
> in the US we have a standard of 120/240
> with the 120 as the appliance voltage
> the British and others use 220 for a standard
> does that mean that 440 is used for the big power draws
> we would place our clothes dryers on 220 do you have 440
> in general use in the home
>
> Bob K3DJC
>
> On Sun, 09 Oct 2011 22:44:20 -0400 Elton A Sanders <[email protected]>
> writes:
> > If it was plugged into US 230v both Black and White would be hot.
> > Mains
> > feed here is 2 hots and Neutral hot to Neutral 115v hot to hot 230v
> >
> > (feed is from a center tapped transformer on the pole).
> > WB5MMB
> >
> >
> > On Mon, 10 Oct 2011 01:25:02 -0000, mal hamilton wrote:
> > > Bob
> > > If you look at a Dentron 2500 amplifier on the cct diagram the
> > 230v
> > > mains cable, WHITE wire goes to the ON/OFF switch on amplifier
> > then
> > > primary of HT transformer which to me is HOT and BLACK wire goes
> > > directly to the other side of primary winding, NEUTRAL and GREEN
> > to
> > > chassis.
> > > In the UK the switch is always in the LIVE (hot) wire and NEUTRAL
> > > direct to the appliance except it happens to be a double switch.
> > >
> > > UK appliance BROWN live, BLUE neutral, plus an earth wire (3 wire
> > > appliance)
> > > mal/g3kev
> > >
> > >> ----- Original Message -----
> > >>
> > >> Sunday, October 09, 2011 7:48 PM
> > >> Re: LF: mains wires
> > >>
> > >> what I use to keep track
> > >>
> > >> Black is hot white is not
> > >>
> > >> Bob K3DJC
> > >>
> > >> On Sun, 9 Oct 2011 17:09:09 -0000 "mal hamilton" writes:
> > >>
> > >>> LF
> > >>> I have a USA amplifier with 230v input. The mains wires are
> > >>> BLACK, WHITE, and GREEN
> > >>>
> > >>> The cct diagram shows White as the live wire with amplifier
> > mains
> > >>> switch in this line, Black goes to the other end directly to
> > >>> transformer primary
> > >>> and Green to earth.
> > >>> but
> > >>> according to USA info the Black wire should be Live and White
> > >>> Neutral.
> > >>>
> > >>> So beware !!!!!!!!!!!!!!
> > >>> de g3kev
> > >>
> > >> ____________________________________________________________
> >
> >
> >
> >
> ____________________________________________________________
> 57-Year-Old Mom Looks 25
> Mom Reveals $5 Wrinkle Trick That Has Angered Doctors!
> http://thirdpartyoffers.juno.com/TGL3141/4e931414668c54808em03vuc
>
|
