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- Path: sparky!uunet!cs.utexas.edu!asuvax!ncar!noao!amethyst!organpipe.uug.arizona.edu!iris4.chem.arizona.edu!dlatimer
- From: dlatimer@iris4.chem.arizona.edu (Darin Latimer)
- Newsgroups: sci.electronics
- Subject: Re: making 110V into 220v
- Message-ID: <1993Jan23.190516.29854@organpipe.uug.arizona.edu>
- Date: 23 Jan 93 19:05:16 GMT
- References: <C19oyE.GnM@panix.com>
- Sender: news@organpipe.uug.arizona.edu
- Organization: Chemistry Dept. Univ. of Arizona
- Lines: 86
-
- In article <C19oyE.GnM@panix.com>, dannyb@panix.com (Daniel Burstein) writes:
- |> someone or another (I don't have original posting) wrote that he was
- |> moving from the UK (220V) to canada (11oV) and asked about running his
- ^^^^^^^^^^^^^
- Most facilites and houses use a 'wye' configuration which results in 120V
- single phase and 208V across any two legs.
-
- |> equipment.
- |>
- |> It's -somewhat-doable if you are VERY careful, and check things out
- |> extremely minutely.
- |>
- |> In the United States and Canada, most residential electrical supplies are
- |> designed with two separate 110V feeds. the vast majority of appliances in
- |> the house are plugged into standard outlets, which use a single leg of the
- |> 110 line, and go to ground for the other. hence actual voltage will be
- ^^^^^^^^^^^^^^^^^^^^^^^^^^
- When I was doing my M.Sc. in Canada we had a major uproar because the
- installer of a high power piece of equipment in our lab connected the
- equipment using 3-phase and ground. According to the electrical code there
- a neutral line IS REQUIRED and you are not to use ground as your return.
- Here at U of A they use four wire three phase --- but for single phase
- 120V you still have a live, a neutral and a ground. Why do you think that
- that there are three lugs on a CSA/UL approved plug/socket?
-
- |> 110V.
- |>
- |> For various electrical purposes, the house should be wired so that the
- |> loac on each leg will be approximately equal, but that's not too critical
- |> an issue here.
- |>
- |> Heavy duty appliances, such as electrical dryers, stoves, ovens, or
- |> (large) air conditioners will run on 220V. They get this by feeding both
- |> legs of the electrical supply (which are 110V in opposite phase) to the
- ^^^^^^^^^^^^^^^^^^^^^^^
- Again, usually three legs at 120V each, 120 degrees out of phase with
- respect to each other.
-
- |> outlet. so as leg #1 "pushes" 110v, leg #2 "pulls" and you get an
- |> effective 220V supply.
- |>
- |> Reason for this use is that net wattage ("power") is based on
- |> voltage*amperage. so if you double the voltage, you can get twice the
- |> power through (roughly) the same wiring.
- |>
- |> ANyway, what this means is that yes, in most cases, you can get a 220V
- |> supply in your residence in the US/Canada. But you have to be VERY
- |> careful that you tap the right wires, etc.
-
- Digging into the breaker box is not really a good idea unless you really
- know what you are doing --- even then, if you mess up and you are not a
- journyman (sp?) electrician your house fire insurance will likely be void
- after you burn your house down.
-
- |>
- |> ALso, the outlets used for 220V are DIFFERENT than the ones for 110V (for
- |> obious safety reasons)...
- |>
- |> If having 220V is important to you, then the simplest (from building code
- |> and electrical code purposes) way is to simply
- |> tell them to install a 220V circuit for an airconditioner/heater, etc.
- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- THE BEST PIECE OF INFORMATION SO FAR!!
-
- |>You can then use standard extension cords and outlet taps, although you
- |> will have to replace the 110V sockets with the 220 ones.
- ^^^^^^^
- Have them install the correct socket when they install the electrical feed.
-
- |>
- |> (many years ago, long enough for the statue of limitations to protect me,
- |> I had a shortage of outlets in my dorm room. However, there was this nice
- |> 220 volt circuit just sitting there, designed for a heavy duty air
- |> conditioner. So I replaced the 220v physical outlet with a 110 volt one,
- |> and plugged in various appliances I had that were dual voltage, like my
- |> electric shaver, radio charger, and radio power supply. NOT receommended
- |> for children and other healthy living things <g>)
- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- Or your roommates computer! <g^2>.
-
- |>
- |> danny (zap/slash/singe) burstein
- |>
- |> dannyb@panix.com
-
- Darin.
-