[GLLUG] UPS trouble

[Peter Christenson]

the breakers are standard single pole 20 amp siemens breaker. my issue was
that I had used a 20A breaker for 19.6 Amp sustained draw across 3 motors
and starting amps are higher.  with lots of starting and stopping any 20amp
is doomed. (Its a insulation machine for retro insulating houses) so in the
end I picked up a 25amp and it resolved the issue. also note though that I
upped the gauge of wire used (to be safe)
but if you ask any electrician they will tell you how "soft" breakers can
get.


to measure the current I used a logging multimeter and custom/diy current
transducer. :)



On Mon, Jul 23, 2012 at 5:38 PM, Richard Houser <rick at divinesymphony.net>wrote:

> You must have crap breakers.  They should last a lot better than that.
> How did you measure the current anyhow?
> On Jul 23, 2012 3:56 PM, "Peter Christenson" <pac1.mi at gmail.com> wrote:
>
>> sorry Clay didn't mean to just send this to just you.
>>
>> although I don't post here much. I can tell you from personal experience.
>> go with a new beaker, if you trip the breaker to many times it will start
>> to get "soft" and trip under less load. I have fried 3 20amp breakers do to
>> tripping them. on the last one I tested the trip load on it from trip 1 to
>> failure, and after about 10 trips it was down to 19.5 amps, 50 trips was
>> down to 16 amps. 62 trips was the failure.  don't know if this random info
>> helps but load balancing helps a lot!!
>>
>> Peter.
>>
>> On Mon, Jul 23, 2012 at 3:39 PM, Don Bosman <dbosman at msu.edu> wrote:
>>
>>> Make the mess. It's cheaper than even a small fire.
>>>
>>> Don Bosman
>>>
>>>
>>> On 7/23/2012 3:00 PM, Tom Schouten wrote:
>>>
>>>> Yep that's the real problem which will be fixed when (time) budget
>>>> allows.
>>>> Currently due to how things are setup I can't do this without making a
>>>> mess...
>>>>
>>>> On 07/23/2012 02:32 PM, Bert W. Carrier Jr. wrote:
>>>>
>>>>> That's the point I was trying to make.  If you can add a breaker
>>>>> dedicated to the computer equipment, you reduce the load on the original
>>>>> circuit that has ACs and whatever else on it.
>>>>>
>>>>> A 15 amp breaker costs about $10 bucks, and 12 gauge wire is less than
>>>>> a buck per foot.
>>>>>
>>>>>
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>>
>>
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