Many thanks Duncan, this certainly helps.
You have certainly made me think today :)
I have a new battery on its way for this UPS, and I'll keep an eye out
for some good deals on more powerful ones.
I guess it's time to buy one of the meters that reads power usage so I
can gauge accurately how much power each PC is using. I bet my study
must be getting close to 1800w when everything is running. It might be
time to upgrade to a 20amp circuit in this room or install a second
15amp circuit to run half the room.
-----Original Message-----
From: hardware-boun...@hardwaregroup.com
[mailto:hardware-boun...@hardwaregroup.com] On Behalf Of DSinc
Sent: Sunday, February 14, 2010 3:34 PM
To: hardware@hardwaregroup.com
Subject: Re: [H] Power Issues
Gary,
Please step back and have a good laugh at yourself. I have done this
"surge-only" mistake many times!! LOL! And, even after doing the 1st
time, I repeated that same mistake 2 more times.......... :)
You are NOT dumb!
Yes, I would suspect that the PC along with everything else might cause
the ups to trip off. Guess what, I have done this also! LOL! (And, then
spent 2 days trying to comprehend why this stupid ups did not work
properly!!) ......... :)
OK, about the wall socket, I suppose I will defer to the pro
electricians of this list. But. All I know is that any given (from the
fuse box) 15A circuit allow only 1800W max to be drawn; regardless of
what may be on that circuit. The socket is probably not the error.
(Well, unless it is being fed from two different circuit branches; and
if so this socket has the tabs cut and there are>2 feed lines in the
wall box.).....For now, never-mind!! OK?
Again, I'll defer to the pros here; I'm still learning by
doing/repairing!
In any case, all the "stuff" plugged in on any given line all draw power
from the same CB/Fuse. I'm told this is 1800W on a 15A circuit.
I limit my home 15A circuits to ~1200W max. Just me.
Don't think it is a "starve" like condition. But, when you start to get
near the max that your 15A circuit can sustain, weird stuff starts to
happen. Any sudden spikes (demands) ripple up and down the whole chain.
Like the next outlet in the same wall plug.
Greg is correct! Laser printer fuser's still have really ugly power
demands when they fire up! It is the nature of the beast sadly. And, why
I run my simple b/w laser printer direct to the wall! I let it argue for
'trons' with the coffee machine and a pair of RS1500LCD APCs. This
branch never draws>9A; even on a bad day.
A dead battery in the ups causes the ups to expend lots of energy trying
to charge up a battery that, in this case, will never charge. In this
scene, the poor ups just does not have any reserve to help feed the PC
and the other stuff plugged into it. At least, that is what I have seen
through 2 failed battery sessions!
Again, I will leave this science to the experts. Just sharing what I've
seen here and what I know about home AC business.
I do so hope this helps. If not, I have a simple visual of a glass and
water to help explain my focus. It is JMHO.
Best,
Duncan
On 02/14/2010 16:04, Hunter, Gary wrote:
Hi Duncan,
OK Now I really have to admit how dumb I am. Good call the PC was on
the
surge protector only side :(
Problem now is when I put the PC on the UPS side it draws too much
current and trips.
It is certainly time to buy some bigger UPS's
In my other email I was talking about the wall socket. I still don't
understand how one socket can starve the other one of power even
during
a surge. I would more expect the fuse box to trip. This is on a 15amp
circuit.
Thanks,
Gary
-----Original Message-----
From: hardware-boun...@hardwaregroup.com
[mailto:hardware-boun...@hardwaregroup.com] On Behalf Of DSinc
Sent: Sunday, February 14, 2010 1:01 PM
To: hardware@hardwaregroup.com
Subject: Re: [H] Power Issues
Gary,
I did understand your plug arrangement. Did not read the printer
plugged
into the ups. Most ups docs say not to do this.
You may have your PC plugged into a "surge-only" outlet on the ups. I
did this twice!!
Think you may have "surge-only" outlets and BBU outlets.
Sorry, did not look at the outputs of the 350G.
Best,
Duncan
On 02/14/2010 12:21, Hunter, Gary wrote:
Why didn't I think of number 1 LOL
I unplug it and the computer switches off. The UPS then beeps to
indicate no power. So I guess the battery in the UPS is enough to keep
it's monitoring up but not the PC.
I am still wondering if the socket is bad though.
-----Original Message-----
From: hardware-boun...@hardwaregroup.com
[mailto:hardware-boun...@hardwaregroup.com] On Behalf Of Richard
Quilhot
Sent: Sunday, February 14, 2010 10:01 AM
To: hardware@hardwaregroup.com
Subject: Re: [H] Power Issues
1. Test the ups by unpluging it. If the computer shuts down, the ups
is bad.
2. If ups had USB cable running to the PC, you might have auto shut
down enabled.
On 2/14/10, Hunter, Gary<gary.hun...@travelport.com> wrote:
Hi,
I have a color laser printer (Brother HL-4040CDN) and an APC
BACK_UPS
ES 350
plugged into the same power outlet. A PC is hung off of the UPS
along
with
some speakers, a harddrive and two switches. The PC is nothing
special and
has 450w PSU in it (can't remember the make but can look it up if
it's
important).
So the problem is when the printer comes out of sleep mode it
temporarily
draws a lot more current and this causes the PC to shut down. I am
assuming
I have a problem with the UPS maybe a bad battery, but the UPS is
not
beeping or indicating it is bad in anyway. Am I correct in thinking
the UPS
is bad, or could it be a combination of a bad power outlet and a bad
UPS? I
am thinking when there is the increased current draw it delivers all
the
power to the top socket and the bottom doesn't get any.
Any help would be appreciated.
Thanks
Gary Hunter
Enterpise Architect
Travelport GDS
T: (+1) 303 - 397 - 5035
M:(+1) 720 - 231 - 0965
E: gary.hun...@travelport.com
SITA: HDQOK1G
Travelport Product Development Center
6901 S Havana St
Centennial, CO 80112
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