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- From: smckinty@sunicnc.France.Sun.COM (Steve McKinty - Sun ICNC)
- Newsgroups: sci.electronics
- Subject: Re: Various national colour code of wires(e.g. earth) for elec. plug
- Date: 9 Nov 1992 10:41:23 GMT
- Organization: SunConnect
- Lines: 75
- Sender: smckinty@France.Sun.COM (Steve McKinty - Sun ICNC)
- Distribution: world
- Message-ID: <1dlf8jINNedr@grapevine.EBay.Sun.COM>
- References: <wai.721266966@phoenix> <1992Nov9.002325.1@auvax1.adelphi.edu>
- NNTP-Posting-Host: hardy.france.sun.com
-
- In article <1992Nov9.002325.1@auvax1.adelphi.edu>, schmidt@auvax1.adelphi.edu writes:
- > In article <wai.721266966@phoenix>, wai@socs.uts.edu.au (Wai Yat Wong) writes:
- > > Anybody out there can tell me about the colour coding various
- > > country use for labelling a wire as active or neutral or
- > > ground.
- > >
- > > I know that green is obviously earth, but I have this
- > > two extra wire; one of them is white, the other is
- > > black. Does the white go to the active pin and
- > > black go to the neutral pin?
- >
- > It's the other way around, white is the "neutral" or in your terminoligy,
- > "earthed" current-carrying color (the green, as you stated, is the protective
- > ground, connected to the metallic case). The black, or any other color than
- > white or green, the US code only defines the green and white, is the "hot" 120
- > volt lead.
- >
- > In the case of 240 volt devices, there should be no white wire, two colors
- > (usually black and red), and the green safety ground. Three phase devices
- > (nominally 208 volts "Y", or 240 volts "delta" would have three colors (most
- > commonly black, red, and blue) possibly a white neutral, if wye connected, and
- > a green ground.
-
- In most of W. Europe flexible cords use Green/Yellow striped as protective
- ground, Blue for Neutral and Brown for Live (Hot). In the UK (the one
- I'm most familiar with) rigid house wiring uses Black for Neutral and Red
- for Live, some old flexible cords also used that but most of them will
- have been replaced by now.
-
- French house wiring uses different colours for the live depending on whether
- it is before or after a switch (well, thats what the wiring code says. It
- lists 5 possible colours which can be used. My house uses 7....)
-
- [ other interesting stuff deleted ]
-
-
- > Somewhere, I have a catalog from a company which makes international cord sets
- > which has wiring diagrams for almost every standard in the world. When I
- > visited southern Africa, I bought a copy of the Sowetan, a paper aimed at the
- > residents of Soweto, South Africa. I was surprised to find inside a full page
- > advertisement from the electric utility showing how to connect the cord to
- > their plug (the same one used in India and numerous former British colonies,
- > but not in Britian itself) The plug was "large" like the British one, but had
- > round pins where the British one had rectangular ones. The same one was used
- > in Botswana, where I spent most of my time, and, as I remember, in Zimbabwe.
- > My "universal adapter" set wasn't, and I had to go to an electric shop which
- > had an adapter to the "British" style, which I then plugged my adapter into,
- > which I then plugged my transformer into, etc.. So much for world standards.
-
- Britain used to use the old round-pin plugs, in two sizes. Small ones for
- 5A table lamp circuits and bigger ones for 15A 'normal' circuits. These
- were wired with a separate fuse for each outlet, at the fuseboard. As more
- and more electrical equipment came into use this made fuseboards unwieldy and
- so a new style was adopted, in the 50's I think.
-
- The new system has the wiring in the form of a ring, looping out from the
- fuseboard, serving all sockets on one floor or within a certain number
- of square feet, and back to the fuseboard. At the fuseboard there is a
- single 30A fuse per ring.
-
- Each plug (all of the same standard 3-pin design) has its own fuse, which
- should be chosen to suit the rating of the appliance. It often isn't, the
- plugs are sold with 13A (maximum) rated fuse fitted, and people often don't
- change it for a lower value when they use the plug for a low-power appliance.
- As more & more apliances are being equipped with moulded and correctly fused
- plugs as standard this is less of a problem now.
-
-
- Steve
-
- --
- Steve McKinty
- SUN Microsystems ICNC
- 38240 Meylan, France
- email: smckinty@france.sun.com BIX: smckinty
-