which breaker? probably just too many amps. the second run to the 3d printing area - did that get installed? On 2015-01-26 21:48, Jake 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 &lt;adam(a)aperture.systems&gt; 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 &lt;adam(a)aperture.systems&gt; wrote: _______________________________________________ sudo-discuss mailing list sudo-discuss(a)lists.sudoroom.org https://lists.sudoroom.org/listinfo/sudo-discuss

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 &lt;steveberl(a)gmail.com&gt; wrote:

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 &lt;steveberl(a)gmail.com&gt; 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 &lt;steveberl(a)gmail.com&gt; wrote: 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 &lt;dkeenan44(a)gmail.com&gt; 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 &lt;adam(a)aperture.systems&gt; 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" &lt;dkeenan44(a)gmail.com&gt; wrote: Yes to this Adam, thank you. I searched around and found a product like this - 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 &lt;adam(a)aperture.systems&gt; 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. _______________________________________________ sudo-discuss mailing list sudo-discuss(a)lists.sudoroom.org https://lists.sudoroom.org/listinfo/sudo-discuss -- -steve

I suspect part of the problem is that the Bocce ball court gets so cold that people have been using space heaters. If most of the outlets are on a single breaker, it doesn't take too much extra to trip a breaker if you have a heater running... Patrik On Tue, Jan 27, 2015 at 11:41 AM, Steve Berl &lt;steveberl(a)gmail.com <javascript:_e(%7B%7D,'cvml','steveberl@gmail.com');>> wrote:

I'd just like to bump this thread up again in the hopes that someone knowledgeable will trawl eBay for suitable isolation transformers? On Tuesday, January 27, 2015, David Keenan &lt;dkeenan44(a)gmail.com&gt; wrote: Yes, what I mostly meant by upstream effects is that flipping the breaker obviously turns off a lot of other outlets in Sudo and possibly breaks others' projects.  I don't think a space heater was running, but I wouldn't swear to it. David  On Tuesday, January 27, 2015, Patrik D'haeseleer &lt;patrikd(a)gmail.com&gt; wrote: I suspect part of the problem is that the Bocce ball court gets so cold that people have been using space heaters. If most of the outlets are on a single breaker, it doesn't take too much extra to trip a breaker if you have a heater running... Patrik On Tue, Jan 27, 2015 at 11:41 AM, Steve Berl &lt;steveberl(a)gmail.com&gt; wrote: 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 &lt;dkeenan44(a)gmail.com&gt; 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 &lt;adam(a)aperture.systems&gt; 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" &lt;dkeenan44(a)gmail.com&gt; wrote: Yes to this Adam, thank you. I searched around and found a product like this - 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 &lt;adam(a)aperture.systems&gt; 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. _______________________________________________ sudo-discuss mailing list sudo-discuss(a)lists.sudoroom.org https://lists.sudoroom.org/listinfo/sudo-discuss -- -steve _______________________________________________ sudo-discuss mailing list sudo-discuss(a)lists.sudoroom.org https://lists.sudoroom.org/listinfo/sudo-discuss

every power strip ever has its own 15-amp circuit breaker, which will pop before the one in the panel

I don't recognize the problem that is the cause of our discussion, so I won't endource purchasing a transformer until (a) I understand the problem, or (b) we get the transformer for free and someone else installs it. Tripping breakers is not a cause for concern in my view unless it's happening on a regular basis. The servers are on a dedicated breaker within the box in the "crows nest" so unless the breaker that supplies that box is tripped there is no risk to the Internet connection. Installing this hypothetical transformer should be considered along with the installation implications. After all, to take full advantage of the transformer as a safety and security feature it should be installed off the main panel, not off a sub, of a sub. what that means is a cable run from the main, either within existing conduit or otherwise to somewhere else in the building. Which has a cost. basically I think we're putting the cart before the horse here. Why research the purchase of equipment when the nature of the problem and its alternative solutions are not fleshed out? -whit On Thursday, January 29, 2015, David Keenan &lt;dkeenan44(a)gmail.com&gt; wrote: I'd just like to bump this thread up again in the hopes that someone knowledgeable will trawl eBay for suitable isolation transformers? On Tuesday, January 27, 2015, David Keenan &lt;dkeenan44(a)gmail.com&gt; wrote: Yes, what I mostly meant by upstream effects is that flipping the breaker obviously turns off a lot of other outlets in Sudo and possibly breaks others' projects. I don't think a space heater was running, but I wouldn't swear to it. David On Tuesday, January 27, 2015, Patrik D'haeseleer &lt;patrikd(a)gmail.com&gt; wrote: I suspect part of the problem is that the Bocce ball court gets so cold that people have been using space heaters. If most of the outlets are on a single breaker, it doesn't take too much extra to trip a breaker if you have a heater running... Patrik On Tue, Jan 27, 2015 at 11:41 AM, Steve Berl &lt;steveberl(a)gmail.com&gt; wrote: 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 &lt;dkeenan44(a)gmail.com&gt; 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 &lt;adam(a)aperture.systems&gt; 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" &lt;dkeenan44(a)gmail.com&gt; wrote: Yes to this Adam, thank you. I searched around and found a product like this [1] - 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 &lt;adam(a)aperture.systems&gt; 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.