[Build] electrical

Thu Aug 20 04:19:20 UTC 2009

On Wed, 2009-08-19 at 16:10 -0700, neil maclean wrote:
> jim wrote:
> > additional notes: 
> >
> >    jason suggested we put 15A breakers in the boxes 
> > that interface between the rails and the 
> > cables/receptacles. this seems pretty good to me; 
> >   
> that is a good idea, your thinking of GFI plugs or fuse holders? I don't 
> know of a "breaker" that would fit in a single gang box. but either of 
> the other are good ideas. Maybe GFI for computers and fuses for motors 
> or irons?
jameco has breakers of various sorts that would 
likely fit. jason actually suggested gfis. 

> > it lets use use the 50 A breakers and the #6 wire 
> > that powers the rails without worry. 
> >
> >   
> I'm still thinking of re-purposing some of those feeds for sub panels. 
> Do you think any of the rails _need_ 50 amps?
> >    we'd discussed an additional sub-panel near the 
> > south west corner. 
> >
> >   
> yes, I was economizing. Also, I don't know what use that panel would be 
> put to?
only a matter of locating a power source in 
that area for future possibilities. the idea 
is that this is a makers/hackers/doers space 
and it should be as flexible as possible. for 
example, if someone were shooting a small 
scene for video, they might need more than 
20 Amps. a sub-panel nearby would let us 
add some half-inch pipe with a couple or 
three circuits for lights or whatever. 

>  
> >    we have a fair amount of #6 and a variety of 
> > breakers. my understanding is that #6 is rated for 
> > 65 Amps (though not continuous duty). can we put a 
> > 60 Amp breaker to control #6 to a sub-panel (i'm 
> > thinking of the three-phase sub-panel to the 
> > machine shop ("dirty shop"). 
> >
> >   
> I'd like to see a layout for what equipment we are imagining in the 
> shop. If it would draw over 50 amps I would rather run #4 and put in a 
> 70 amp breaker, if its reasonable to think all the motors could be 
> running at the same time.
we have a 70 amp breaker, i believe. let's buy the #4 
as we'll have to buy more wire anyway. it seems not in 
the nature of noisebridge to have much of a plan for 
anything, mainly because new stuff and new projects 
regularly pop up (and proposed, sanctioned, approved 
projects sometimes never come to pass) 

> 
> How much #6? The space will swallow pipe and wire without taking a breath.
> 
> >    the work mode model we've had in mind is to 
> > invite anyone who wants to do the work, first 
> > qualifying them and mentoring as need be, of course. 
> >
> >
> >   
> I like that work model. I was concerned because there are lots of 
> competing needs for people's attention, for example, last night Rachel 
> pulled off the electrical in part to head the painting team. So I only 
> know of deleTed, you, and I currently on our team.
   there are several others who've volunteered and 
then gone dark, probably temporarily. there are 
others who've got related experience who've not 
yet piped up but probably will. people come and go 
unpredictably. 
   there are certainly lots of jobs needing lots 
of people, and my experience is that only a small 
percentage of a group actually puts in much time. 
   my desires are to get the floor done first, then 
get the electrical just barely good enough, then get 
the painting done, then improve the electrical some 
more. 

> 
> thanks for notes.
> Neil

> > On Wed, 2009-08-19 at 11:54 -0700, neil maclean wrote:
> >   
> >> Yesterday I had the chance to meet with Jim, and to speak with Miloh, 
> >> Zedd, Jay, and Rachel, and last Sunday I was able to spend some time 
> >> working with Shannon.
> >>
> >> This is my second week of focused interaction with Noisebridge. I think 
> >> I can help build out the space, especially the electrical, and am 
> >> grateful that you albeit abruptly, made me the leader of that "team." (I 
> >> hope there is a team.) (Would interested folks let me know? I can share 
> >> useful skills plus I will need many kinds of help, from just handing me 
> >> things while I'm on scaffold, to mapping circuits, pulling wire and 
> >> bending pipe.) 
> >>
> >> I'll post a few organizational comments separately.
> >>
> >> (Many thanks to Jim for getting together and helping clarify the rough 
> >> plan below.)
> >>  
> >> I'll propose an immediate budget at Friday's meeting. (not full budget, 
> >> but getting started, immediate budget.)
> >>  
> >> Provided budget approval, beginning next week: set up a rolling scaffold 
> >> and run electrical conduit lines to several key places for distribution 
> >> panels.
> >>
> >> Distribution panels as follows:
> >> 1. kitchen/laundry (after speaking with Miloh): 100 amp 3phase (range, 
> >> stove, water heater and dryer on blue and red legs, approx 6 110v legs 
> >> on black.)
> >> 2. wood and metal shop (after speaking with Shannon and Jim): 50 amp 3 
> >> phase (is this big enough? a list of potential gear would be helpful.)
> >> 3. audio video booth (after speaking with Jim) 50 amp single phase (what 
> >> do you think Dr. J, others?)
> >>
> >> Existing overhead rails (after speaking with Jim, Miloh and Shannon) 
> >> should be powered with 20 amp single phase, including removing some of 
> >> the rail in the projection area, and perhaps relocating it.
> >> Additional branch circuit runs to electronic shop and classrooms as 
> >> needed out of new or reworked panel in existing location.
> >>
> >> please help me modify and improve on this basic plan. It would be 
> >> necessary to locate these panels precisely before I complete the runs. 
> >> So discussions with (at least) Miloh, Zedd, about kitchen, Dr. J about 
> >> booth, and I have no idea who about the shop at Friday's meeting would 
> >> be ideal.
> >>
> >>
> >>
> >> notes:
> >> this leaves lighting as is.
> >> this leaves branch circuit build-out in specific areas for later as gear 
> >> and money arrives
> >> Important Question: Who has the key to the main disconnect switch 
> >> padlock in the basement?
> >>
> >> thanks all,
> >> Neil
> >>
> >> -- 
> >> They further concluded that at least 8 detainees in US custody were 
> >> tortured to death. Steven Miles, reporting in this journal, put the 
> >> number of deaths due to torture at 17, with 11 cases occurring in Iraq 
> >> and 6 occurring in Afghanistan.[8] 
> >> <http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1868355#R8> 
> >> Many of these deaths involved torture or abuse related to harsh 
> >> interrogations of the detainees by US personnel.
> >>
> >> from: Public Medical Records Central: a free library of Life Science 
> >> Journals
> >> http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1868355
> >>
> >>     
> >
> >
> >   
> 
> -- 
> They further concluded that at least 8 detainees in US custody were 
> tortured to death. Steven Miles, reporting in this journal, put the 
> number of deaths due to torture at 17, with 11 cases occurring in Iraq 
> and 6 occurring in Afghanistan.[8] 
> <http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1868355#R8> 
> Many of these deaths involved torture or abuse related to harsh 
> interrogations of the detainees by US personnel.
> 
> from: Public Medical Records Central: a free library of Life Science 
> Journals
> http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1868355
>