27 Jan
2015
27 Jan
'15
12:41 p.m.
Excellent, thanks for that input. I think there's a few circuits on the
upstairs subpanel that are Sudo's - Rayc labelled the one that flipped I
believe, but all sudo's circuits should all be so marked next time someone
who knows gets a chance (Whitney?)
I believe the circuits are 30A & 1 70A for the robot, but I'm going from
memory here -
- Can someone confirm which circuits are Sudos on the 'crow's nest'
subpanel, and tell the list what those circuits are rated at? (And label /
write with sharpie 'Sudo' next to them on the panel)? Whitney, I don't know
if you remember this or have notes of it -
- Can someone with skillz pass on links to suitable isolation transformers
that are currently on eBay?
Best,
David
On Tue, Jan 27, 2015 at 12:00 PM, Steve Berl <steveberl(a)gmail.com> wrote:
As long as the isolation transformer has current
limiting fuse/breaker,
which has a lower limit than the main breaker, this should help and be
safer for the experimenters.
-steve
On Tue, Jan 27, 2015 at 11:49 AM, David Keenan <dkeenan44(a)gmail.com>
wrote:
Adam was there and I feel can explain far better
than I why the breaker
flipped, but we do know why it occurred.
In the most basic language folks are shorting the circuit by working on
electronics & machines that are connected up to power. So it's not that the
circuit is being 'overloaded' by say drawing too many Amps, its from a
miswire -
Since you asked it was the gentleman named Sam with the electric
motorbike, who was working on a project (looked like a motor, or?) that
flipped the breaker. Not sure if I have said person's email but presumably
they are on this list -
It's important for me to say that Sudo is around precisely for such
experimentation and hackery and Sam should not feel badly for flipping the
breaker. Rather, I feel we need to create safer workspaces and workflows
(as much as we can at any rate) for such experimentation to take place so
that upstream consequences for the rest of the building are minimized.
Best,
David
On Tue, Jan 27, 2015 at 11:41 AM, Steve Berl <steveberl(a)gmail.com> wrote:
--
-steve
If people are overloading the circuit breakers,
or the breakers are
tripping at lower than designed currents, this will not help.
Before buying anything you should figure out why the breakers are
tripping.
-steve
On Tue, Jan 27, 2015 at 11:38 AM, David Keenan <dkeenan44(a)gmail.com>
wrote:
Killer. Adam - since I obviously lack the
technical literacy to scope
eBay for the properly right stuff, might this be something you'd be willing
to look for on our behalf - i.e., pass on links to some Adam-approved eBay
isolation transformers)?
If Sudo does not have the funds to hand to acquire these, depending on
the cost I will make a request of Omni Commons to purchase. As I see this
as something that will help us pass our Fire Life & Safety inspection for
the building..
David
On Tue, Jan 27, 2015 at 11:21 AM, Adam Munich <adam(a)aperture.systems>
wrote:
> It would be better to get something like this on eBay, because large,
> ie several kilowatt transformers typically can be had for pennies on the
> dollar there. Low voltage transformers really don't go bad so the age
> doesn't matter.
> On Jan 27, 2015 11:19 AM, "David Keenan" <dkeenan44(a)gmail.com>
wrote:
>
>> Yes to this Adam, thank you. I searched around and found a product
>> like this
>>
<http://www.officedepot.com/a/products/147370/Tripp-Lite-IS1000HG/?cm_mmc=PLA-_-Google-_-Computer_Tablet_Accessories-_-147370-VQ6-42102167876-VQ16c-VQ17-pla-VQ18-online-VQ19-147370-VQ20-72939322076-VQ21->
-
>> Adam would you say this is the right sort of product for sudo or can you
>> reccomend a better / more affordable one?
>>
>> David
>>
>> On Tue, Jan 27, 2015 at 11:09 AM, Adam Munich <adam(a)aperture.systems>
>> wrote:
>>
>>> I think the ideal solution here would be to get some form of
>>> isolation transformer with an in-line breaker for when people want to fuck
>>> with the line. In this way it is very difficult to a) electrocute yourself
>>> and b) cause damage to the circuits.
>>>
>>> Further if we ever get a safety inspection this would appease people
>>> swiftly.
>>>
>>
>>
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--
-steve