31 Oct
2000
31 Oct
'00
8:36 a.m.
Sounds like 220v 2-phase. Two hots and one neutral/ground. If its
marked 20A, I believe the connector is probably an L6-20 twist-lok.
Not difficult to wire up in most US homes.
My computer room is running from two APC Matrix 5000 5kva UPSs,
which have 220v inputs and 110/220v outputs. I ran two 30A 220V
(L6-30 twist-lok) circuits from the two outer poles on my breaker
panel to power the UPSs, and everything (be it 110v like the regular
Alphas/Suns/SGIs and such or 220v for the Crays) runs from the UPSs.
Having the equipment run from dedicated 220v 2-pole breakers is
very, very nice. Definitely worth the trouble.
-Dave McGuire
On October 31, Merle K. Peirce wrote:
I just checked ours - it's 3 prong.
On Tue, 31 Oct 2000, Dave McGuire wrote:
On October 31, THETechnoid(a)home.com wrote:
M. K. Peirce
Rhode Island Computer Museum, Inc.
215 Shady Lea Road,
North Kingstown, RI 02852
"Casta est qui nemo rogavit."
- Ovid Last weekend I aquired a system/36 model 5360.
Have not powered it as
yet. The plug does not fit either of my dryer sockets but is marked
250vac, 20amp. Is this a three-phase machine? If so I think I am in
trouble..... ;-)
Does the plug have three prongs or four?
-Dave McGuire
31 Oct
31 Oct
1:29 p.m.
Fairly simple to determine...
Take the cover off and see how the power cord terminates. If one wire
goes to the frame, it's LIKELY 220/240 single phase. (that's what you
have at home... Runs your stove, water heater, dryer.) There may also
be labeling inside telling the power requirements. Three phase power
for an office machine is most uncommon. (And the System 36 WAS an
office machine!) Easiest way to find out is plug it in!
But then again, we ARE talking about a System 36. Just might be steam
powered! ;o)
Jim Arnott
Industrial Electrician
Dave McGuire wrote:
Sounds like 220v 2-phase. Two hots and one neutral/ground. If its
marked 20A, I believe the connector is probably an L6-20 twist-lok.
Not difficult to wire up in most US homes.
My computer room is running from two APC Matrix 5000 5kva UPSs,
which have 220v inputs and 110/220v outputs. I ran two 30A 220V
(L6-30 twist-lok) circuits from the two outer poles on my breaker
panel to power the UPSs, and everything (be it 110v like the regular
Alphas/Suns/SGIs and such or 220v for the Crays) runs from the UPSs.
Having the equipment run from dedicated 220v 2-pole breakers is
very, very nice. Definitely worth the trouble.
-Dave McGuire
On October 31, Merle K. Peirce wrote:
> I just checked ours - it's 3 prong.
>
> On Tue, 31 Oct 2000, Dave McGuire wrote:
>
> > On October 31, THETechnoid(a)home.com wrote:
> > > Last weekend I aquired a system/36 model 5360. Have not powered it as
> > > yet. The plug does not fit either of my dryer sockets but is marked
> > > 250vac, 20amp. Is this a three-phase machine? If so I think I am in
> > > trouble..... ;-)
> >
> > Does the plug have three prongs or four?
> >
> >
> > -Dave McGuire
> >
>
> M. K. Peirce
> Rhode Island Computer Museum, Inc.
> 215 Shady Lea Road,
> North Kingstown, RI 02852
>
> "Casta est qui nemo rogavit."
>
> - Ovid
2:05 p.m.
On Tue, 31 Oct 2000, Jim Arnott wrote:
goes to the frame, it's LIKELY 220/240 single
phase. (that's what you
But then again, we ARE talking about a System 36.
Just might be steam
powered! ;o)
Why is everyone so down on the S/36? It's a great machine that kept many
a business running for years.
The 5360, as well as the 5340 (S/34), are 220 volt single phase (actually
2-phase if you want to be exact). The way I hook mine up is to open the
power plug and take the wires off. You'll find a red, a black, and a
green. Green is ground the world around, and red and black get 220 volts
applied between them. In your house you probably have 110-volt branches
that are on "opposite" sides of the line. In other words, they have 110
volts between either hot and neutral, but 220 volts between the two hots.
Find yourself a suitable 220 volt outlet and do whatever you need to get
it hooked up, either hardwire like I do or get an outlet. The current
draw is about 6 or so amps (I think the label rates it for 8).
BTW the terminals, most (all?) of the printers, and most (all?) of the
tape drives take 110. The printers get fed on a different type of plug
(115V 30A locking as I recall) but it's still 110v.
Richard Schauer
rws(a)enteract.com
2:52 p.m.
Richard,
Please don't mis-read me! I'm not down on the S/36 at all. Excellent
machine designed for running a mid-sized office. 20-40 employees. Had
one offered to me in '87. Had no need/desire and so it went to the
recycler. In 1987, it was essentially worthless.
Jim
"Richard W. Schauer" wrote:
On Tue, 31 Oct 2000, Jim Arnott wrote:
But then again, we ARE talking about a System 36. Just might be steam
powered! ;o)
Why is everyone so down on the S/36? It's a great machine that kept many
a business running for years.
3:08 p.m.
On Tue, 31 Oct 2000, Richard W. Schauer wrote:
On Tue, 31 Oct 2000, Jim Arnott wrote:
Oh? What is the phase shift between the "2-phase"s? Isn't it really
just 220 volt center tapped?
- don
goes to the frame, it's LIKELY 220/240 single
phase. (that's what you
But then again, we ARE talking about a System 36.
Just might be steam
powered! ;o)
Why is everyone so down on the S/36? It's a great machine that kept many
a business running for years.
The 5360, as well as the 5340 (S/34), are 220 volt single phase (actually
2-phase if you want to be exact). The way I hook mine up is to open the power plug and take the wires off. You'll find a
red, a black, and a
green. Green is ground the world around, and red and black get 220 volts
applied between them. In your house you probably have 110-volt branches
that are on "opposite" sides of the line. In other words, they have 110
volts between either hot and neutral, but 220 volts between the two hots.
Find yourself a suitable 220 volt outlet and do whatever you need to get
it hooked up, either hardwire like I do or get an outlet. The current
draw is about 6 or so amps (I think the label rates it for 8).
BTW the terminals, most (all?) of the printers, and most (all?) of the
tape drives take 110. The printers get fed on a different type of plug
(115V 30A locking as I recall) but it's still 110v.
Richard Schauer
rws(a)enteract.com
11:23 p.m.
At 09:08 PM 10/31/00 -0800, Don wrote:
On Tue, 31 Oct 2000, Richard W. Schauer wrote:
The phase shift is 180 degrees! :-) Yes, it's 220 VAC, center tapped
and the center tap is tied to neutral (not ground). The neutrals aren't
supposed to be tied to ground but a lot of people do it anyway. FWIW here
in Florida, the code requires that all new contruction use four conductor
outlets for split phase 220 (one neutral, two hot and one ground).
Joe
On Tue, 31 Oct 2000, Jim Arnott wrote:
Oh? What is the phase shift between the "2-phase"s? Isn't it really
just 220 volt center tapped? goes to the frame, it's LIKELY 220/240 single
phase. (that's what you
But then again, we ARE talking about a System 36.
Just might be steam
powered! ;o)
Why is everyone so down on the S/36? It's a great machine that kept many
a business running for years.
The 5360, as well as the 5340 (S/34), are 220 volt single phase (actually
2-phase if you want to be exact). The way I hook mine up is to open the 
1 Nov
1 Nov
3:25 a.m.
The phase shift is 180 degrees! :-) Yes, it's
220 VAC, center tapped
and the center tap is tied to neutral (not ground). The neutrals aren't
supposed to be tied to ground but a lot of people do it anyway.
Unless things are much different in Florida, the neutral is supposed to be
tied to ground in *exactly* one place for the entire building, and that
place is at the main breaker panel. So I assume you meant that people
add additional neutral-ground connections elsewhere, which is *bad*.
FWIW here in Florida, the code requires that all new
contruction use
four conductor outlets for split phase 220 (one neutral, two hot and
one ground).
Interesting. While I approve on the basis of it being more useful, I
don't understand why the building or electrical would require this.
It doesn't appear to offer any safety advantage.
I should rephrase that. Split phase with neutral doesn't offer any
safety advantage over correctly-used split-phase without neutral. But
I suppose if morons have been abusing the ground wire as a neutral, that
would be likely to burn down some buildings. So I suppose the code
has been updated in an attempt to avoid that situation.
9:15 a.m.
What ground? ;-)
I live in an older house with cloth-covered wireing and no three prong
jacks except in the laundry room, the kitchen, and the bathroom. I know,
I'll get around to rewiring, but everything has been running just great
groundlessly.
You don't want to walk barefoot on the slab in the basement and touch
anything metal though.....
Regards,
Jeff
In <20001101172512.22087.qmail(a)brouhaha.com>om>, on 11/01/00
at 06:15 PM, Eric Smith <eric(a)brouhaha.com> said:
> The phase shift is 180 degrees! :-) Yes,
it's 220 VAC, center tapped
> and the center tap is tied to neutral (not ground). The neutrals aren't
> supposed to be tied to ground but a lot of people do it anyway.
Unless things are much different in Florida, the
neutral is supposed to
be tied to ground in *exactly* one place for the entire building, and
that place is at the main breaker panel. So I assume you meant that
people add additional neutral-ground connections elsewhere, which is
*bad*.
--
-----------------------------------------------------------
Jeffrey S. Worley
President
Complete Computer Services, Inc.
30 Greenwood Rd.
Asheville, NC 28803
828-277-5959
Visit our website at HTTP://www.Real-Techs.com
THETechnoid(a)home.com
-----------------------------------------------------------
11:06 a.m.
On Wed, 1 Nov 2000 THETechnoid(a)home.com wrote:
What ground? ;-)
I live in an older house with cloth-covered wireing and no three prong
jacks except in the laundry room, the kitchen, and the bathroom. I know,
I'll get around to rewiring, but everything has been running just great
groundlessly.
Your basement has a lot of those nifty two-piece cylindrical ceramic
wire clamps nailed amongs the joists overhead, perhaps?
- don
You don't want to walk barefoot on the slab in the
basement and touch
anything metal though.....
Regards,
Jeff
In <20001101172512.22087.qmail(a)brouhaha.com>om>, on 11/01/00
at 06:15 PM, Eric Smith <eric(a)brouhaha.com> said:
> The phase shift is 180 degrees! :-) Yes,
it's 220 VAC, center tapped
> and the center tap is tied to neutral (not ground). The neutrals aren't
> supposed to be tied to ground but a lot of people do it anyway.
Unless things are much different in Florida, the
neutral is supposed to
be tied to ground in *exactly* one place for the entire building, and
that place is at the main breaker panel. So I assume you meant that
people add additional neutral-ground connections elsewhere, which is
*bad*.
--
-----------------------------------------------------------
Jeffrey S. Worley
President
Complete Computer Services, Inc.
30 Greenwood Rd.
Asheville, NC 28803
828-277-5959
Visit our website at HTTP://www.Real-Techs.com
THETechnoid(a)home.com
-----------------------------------------------------------
13 Nov
13 Nov
4:19 a.m.
New subject: System/36 Protect Board
Hi all.
I'm a little embarassed that I had a conversation with a fellow on the
list and don't recall his name.
He offered a replacement board but I thought I could find it locally and
save him the trouble. It turns out the machine at CPB I was planning to
strip is not the same at all.
If you are out there, drop me a note.
Thanks,
Jeff
Dazed and Confused.
--
-----------------------------------------------------------
Jeffrey S. Worley
President
Complete Computer Services, Inc.
30 Greenwood Rd.
Asheville, NC 28803
828-277-5959
Visit our website at HTTP://www.Real-Techs.com
THETechnoid(a)home.com
-----------------------------------------------------------
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