From: jcl@deshaw.com (Jonathan Laventhol)
Newsgroups: comp.sys.mac.hardware
Subject: Apple's Power Supplies (GUIDE)
Keywords: PSU, 220V, 240V, 110V
Date: 25 Jul 92 00:04:44 GMT
Reply-To: jcl@deshaw.com (Jonathan Laventhol)
Organization: D. E. Shaw & Co.
Originator: jcl@shaw2



	**************************
        *                        *
	* Apple's Power Supplies *
	*                        *
	**************************

Everything you wanted to know (and more) about Apple's Power
Supply Units.

Lots of people (me in particular) want to know whether Apple
equipment bought in one part of the world will work in another.
Here's a useful pile of information, gleaned from various
places.  Use it as you see fit: I make no claims to accuracy or
anything else.

CONTRIBUTIONS SOLICITED!



1) Which Countries Have What
----------------------------

I have measured:
  United States		110 Volt, 60 Hertz
  United Kingdom	240 Volt, 50 Hertz

I believe:
  France		220 Volt, 50 Hertz, but also others
  Spain			220 Volt, 50 Hertz, but also others

I am told that:
  Japan			110 Volt, 60 Hertz
  Australia		240 Volt, 50 Hertz

I am given to understand that the US and UK voltages are the
only services you will find in those countries.

Plugs and sockets: Every country has its own shape of plug and
socket.  Some countries (UK) have fuses in every plug; some
countries (US) have a lot of non-grounded wiring.


2) Apple's Products
-------------------

People are forever saying things like "All new Macintoshes just
plug in".  Well, yes and no.


Here's the list, taken from all the available information
sheets from Apple's Fax Facts service on 920428, IN THE UNITED
STATES!

You will note that some products are marked as only working
with US voltages.  Obviously Apple makes different versions:
the information here is the information available in the United
States.



Product				Note	VAC		Hertz	Watts
-------				----	---		-----	-----
Macintosh Classic		  A-	120 nom		47-63	100
Macitosh LC II			  AB	90-240		47-63	50
Macintosh IIsi			  A-	120 nom		47-63	100
Macintosh IIci			  AB	100-240		50-60	90
Macintosh IIfx			  AB	100-240		48-62	230
Apple II GS			  A-	107-132		50-60	60
Apple IIe			  A-	95-127		60	60
Macintosh Classic II		  A-	120 nom		47-63	100
Macintosh PowerBook 100		  AB	110-220		50-60	N/A
Macintosh PowerBook 140		  AB	110-220		50-60	N/A
Macintosh PowerBook 170		  AB	110-220		50-60	N/A
PB Fax/Data Modem		1 AB	110-220		50-60	N/A
Macintosh Quadra 700		  AB	100-240		50-60	50
Macintosh Quadra 900		  AB	100-240		50-60	303
Macintosh 12" Monochrome disp	2 AB	90-132/190-270	47-63	30
Macintosh Portrait Disp (15")	  AB	90-270		47-63	75
AppleColor RBG Monitor (12")	  A-	108-132		50-60	90
AppleColor High-Res RGB (13")	  AB	85-270		47-63	90
21" Color Monitor		3 AB	85-135/170-270	47-63	165
Macintosh 12" RGB Display	  A-	100-120		50-60	90
Macintosh 16" Color Display	  AB	90-270		47-63	130
Apple One Scanner		  A-	110 +/-10%	58-62	45
ImageWriter II			  A-	90-132		50/60	N/A
StyleWriter (US/Japan)		  A-	100-120		48-62	23
StyleWriter (Europe/Australia)	  -B	220-240		48-62	25@220V
Personal LW LS (USA 110V)	4 A-	N/A
Personal LW NT (US/Japan)	  A-	100-115		50-60	600
Personal LW NT (Eur/Australia)	  -B	220-240		50-60	550 @220V
LaserWriter IIf (US/Japan)	  A-	90-126		50-60	900 @115V
LaserWriter IIf (Eur/Australia)	  -B	198-264		50	880 @240V
LaserWriter IIg (US/Japan)	  A-	90-126		50-60	900 @115V
LaserWriter IIg (Eur/Australia)	  -B	198-264		50	880 @240V
Personal LW NTR (US/Japan)	  A-	110-115		50-60	600 @115
Personal LW NTR (Eur/Austr)	  -B	220-240		50-60	550 @220V
AppleOne Scanner for Windows	  A-	110 +/-10%	58-62	45
AppleCD 150			5 AB	100-240		50-60	0.24A

A) Alleged to work in_A_merica
B) Alleged to work in _B_ritan

1) It really plugs into the mains?  It says it fits inside the
PowerBook!

2) It says: "90-132 and 190-270".  My understanding is that
it has a switch on the back.

3) It says: "85-135 or 170-270".  My understanding is that it
has a switch on the back.

4) No power given, but the product is annotated "USA 110V" in
its part number.

5) 0.24A should use 25W (100V) or 60W (240V) but don't take my
word for it.

3) Short Lecture on AC Voltages
-------------------------------

The 'mains' power (as we call it in England) is, in domestic
circumstances, single-phase AC: it wobbles up and down, at a
certain rate.  We measure the frequency of how fast it changes,
and the (average) height it reaches.  It's supposed to be a
sine wave, so a graph of voltage against time looks like this:



      |<------period--------->|
     ***                     ***          ---
   **   **                 **   **        ^
  *       *               *       *      peak
 *         *             *         *      v
+-----------+-----------+-----------+-----------+----------
             *         *             *         *
              *       *               *       *
               **   **                 **   **
                 ***                     ***

The frequency is 1/period.  The average voltage is measured
according to a scheme call Root Mean Square, which (just
for interest) is peak/sqrt(2).

The only values anybody ever uses (electronic engineers apart)
are the frequency and RMS voltage.

You may also be interested in the maximum power the thing
takes, if you're adding up how big to make your fusebox
(circuit breakers).

Finally, you might be interested to know that the voltage will
change and fluctuate (and some countries' power generators will
do this to save money: take it down a few percent).  But
usually the frequency is really accurate.


----------------------------------------------------------------

Enjoy!
Corrections and further information requested: especially from
EUROPEANS!  Also, What about SE/30s and other equipment not in
the current product line but still very much in use.

Email preferred.

J.

---------------------
Jonathan Laventhol
Systems Administrator
<jcl@deshaw.com>
D. E. Shaw & Co.
---------------------
Newsgroups: comp.sys.mac.hardware