[sudo-discuss] Sudoroom electrical plans

Mon Sep 8 09:24:58 PDT 2014

I agree the allocated layout with plugs is adequate both per code (max 13
outlets - industry practice 10/breaker) and for our loads. I'm just waiting
for the nod to start the work. There is plenty of volume in the 3/4"
conduit for future alterations. Naturally, I would like to get the
reimbursement check ASAP. The hurtle I have heard include signing off by
L.Lord to begin. I have some time this week and would like to begin
installation.

-Whit

On Mon, Sep 8, 2014 at 9:15 AM, J Clark <hello at sl-co.com> wrote:

>  On 9/7/14 10:12 AM, hol at gaskill.com wrote:
>
> we've been thinking the desk/laptop load would be split between two big
> power strips with one attached to the back wall and one running from 3d
> printing area, so on 2x20A runs.  so far we haven't tripped a breaker that
> i know of (have we?) and that's with the existing tentacle-suspension
> bridge infrastructure.  from what i understand, there were already $400
> dollars allocated for 'phase i' which has been circulating for a few weeks
> now, and whit already paid out of pocket for the materials to match the
> budget, and as far as i know has not been reimbursed :(.  with the servers
> getting their own dedicated runs, the risks associated with a breaker
> popping in the event of an extreme load are pretty low.  my inclination
> would be that unless someone shows quantitative analysis of planned loads
> exceeding planned capacity (thank you judy for crunching some loads!) then
> we can move forward with the plan that's been refined over the last month.
>  I do not know about any limitations like de-rating breaker positions below
> their rated capacity so there could be something we're missing.
>
>
>
> cheers
>
>
>
>
> On 2014-09-07 08:54, J Clark wrote to hol:
> Hol,
>
> Just curious. If you have, say, 25 Sudoers each with a laptop/3d
> printer/other power thing plugged in at the same time to, say, a several
> extension cord plugs -- guessing average 75 watts each? (between Apple's
> 60W and 80W, guessing more would be the older), that's 1875 Watts at once,
> at 110 V that's 17 amps. (I think that's right.) This is reasonable for a
> 20A circuit? (Seems so, just curious to know if there are other bits to
> consider.)
>
> Thanks
>   judi
>
>
> On Sep 7, 2014, at 8:27 AM, hol at gaskill.com wrote:
>
> i do think since CCL will be pulling from a different panel that we should
> have enough amps from 4x20 amp breaker positions.  the balcony is set to
> get its own 2 runs (with one 20A plug on each run) for the server farm and
> any amplifiers set to run there, the 3d printing area and museum have a
> breaker run, and the tool area will have its own breaker.  the only
> complication in my mind is the back set of outlets sharing a breaker with
> the tools and someone bearing down with a chop saw just before someone hits
> save on the new greatest cryptographic algorithm on their laptop.  that's
> what pushes it to 5 positions in my mind if it were easy to get that 5th
> run energized.
>
>
>
> we do intend to run a separate 230V service later for the heavy stuff over
> 2 outlets, so maybe we could identify a spot for a breaker to be installed
> under stage 2.
>
>
>
> cheers
>
>
>
>
> On 2014-09-07 07:04, Dave Pedroli wrote:
>
> Fine by me. Just my opinion that loads add up.  Indeed we use more things with small loads than ever before... I have worked on houses that get by on two fifteen amp circuits in San Francisco and I have had problems with two hundred amps 220 volts not being enough...
>
>
> Dave
>
>
>
> Sent from the surveillance van
>
> On Sep 6, 2014, at 5:31 PM, Jake <jake at spaz.org> wrote: I disagree. We
> have very few things that use more than 100 watts, and the number is
> diminishing constantly. a laptop takes no more than 100 watts max,
> typically around 50. 60 watt lightbulbs are occasionally used, but more
> often we use 24 watt CFLs, when we're not simply using the overhead lights.
> Desktop computers with their monitors take a total of less than 200. 3d
> printers take between 50 and 100 watts depending on how much heating is
> needed. A heat gun can take 1500 watts, but a 20-amp breaker can supply
> over 2400 watts. Without a more detailed list of what people expect to plug
> in, we can't be sure one way or another whether there will be conflicts
> requiring something to be plugged into a different outlet. But my
> experience tells me that what we have sketched out so far is more than
> enough. and we know for a fact that increasing service will correspondingly
> increase costs and time to completion, and complexity if we run out of
> circuit breakers overestimating our needs. Worst case is that you have to
> plug the second autoclave into a different outlet than the first one. -jake
>
> On Sat, 6 Sep 2014, Dave Pedroli wrote: Hi all, Going over your emails and
> PDFs it looks good however putting more than a couple outlets on a breaker
> will end up being problematic. Yes refrigerators are smaller loads but
> there will be a time when someone opens all one after the other and they
> try to start all at once blowing a breaker and defrosting... Autoclaves
> typically need their own circuit etc ... 13 outlets with 4 breakers is
> pushing it. If the majority of use was to be laptops and soldering irons ok
> but the minute a heat gun is plugged in poof, you blow a breaker. With
> electricity and parachutes it's best to start out right rather than build
> up to it. I'll go over the PDFs on my iPad later and let you know what I
> think. The layout looks fine, the number of outlets looks good it's just
> the the number of circuits (breakets) that needs improving. Dave Somewhere
> on the bonneville salt flats Sent from the surveillance van
>
> On Sep 5, 2014, at 3:58 PM, Jake <jake at spaz.org> wrote: I believe the
> electrical panel in the balcony only supplies one or two things (not
> including the robot, which is a temporary connection) I think we should
> look into simply moving that breaker box down ten feet so it faces the
> server room, and be done with it.
>
> On Fri, 5 Sep 2014, Whitney Lawrence wrote: Howdy,Let me begin with
> thanking you for looking at the proposal. Your interpretation of the plans
> is correct.{ Main -> above stage panel -> balcony panel } is how the
> proposed plan is drawn. There is enough room in the balcony panel (which is
> the one located in the small room that shares a wall with the server loft
> of sudoroom) to accomplish phase 1 of the proposal. The proposal is based
> on instruction received to minimize cost. Ideally, there would be a main
> panel breaker that supplies a sub panel for all of sudo's needs (phase 1
> and phase 2). I can't accurately guess at a cost number for this type of
> installation. Figure a 100amp sub with hundreds of feet of 2awg plus
> breaker box plus breakers plus conduit plus hardware. All depending on if
> the main service can even handle the additional power demands (hiring an
> electrician to run the calcs). Ballpark $3-5k maybe- but its really a shot
> in the dark? My experience with this type of thing is there is always a
> better way to do it, if you go the money. A middle road is to plan on
> having the future sudo-sub panel placed near the balcony panel. Build in an
> extra 5ft or so of wire for the future transition into the new sudo-sub
> panel. All that would be needed is to remove the breakers from the old box
> re-run wire from J-box 1 to the new sudo-sub, as well as re-routing the
> 240V lines from the above stage panel to the sudo-sub (and of course
> preform all the main -> suod-sub work). as far as existing vs proposed.
> only the sub panels mentioned above exist currently- I'll make a note to
> call out the existing stuff in the drawings. Thanks, Whit On Fri, Sep 5,
> 2014 at 11:42 AM, Cere Mona Davis <ceremona at gmail.com> wrote: Hi
> everyone. It's the first time I have looked at these plans and I have some
> questions and thoughts. Dave said he won't be able to respond to this email
> until a couple of days as he is out in the boonies somewhere. So I am
> writing in to expedite some issues that I think he will likely bring up in
> the days ahead. Whit, thanks for drawing up these plans! For someone who is
> not intimately familiar with our electrical layout the plans might need a
> more clear description of existing electrical vs. proposed new electrical,
> however. In multiple conversations with Dave (and one on-site visit) he has
> mentioned repeatedly that we will want to shoot for putting in another sub
> panel for the sudoroom off of the main panel as the end-game; rather than
> daisy-chaining off of an existing panel (the balcony) as what seems to be
> proposed here. If we can't immediately put in a sub panel into the room,
> due to cost, we should at-least be planning for conduit and wiring paths,
> etc that allows for a sudoroom sub-panel in the future. Thoughts? -Cere On
> Fri, Sep 5, 2014 at 10:23 AM, <hol at gaskill.com> wrote: Thanks Yar! Whit
> can you liaise w/ Dave RE how much of the work is going to be done under
> the first permit? Cheers, Hol On 2014-09-04 23:16, yar wrote: Hi all, Dave
> Pedroli is a certified electrician who's offered to review our plans to
> give them an okay. I'm copying him and the people who've been most involved
> with electrical work. Dave, the latest plans are attached, and also
> available online[1
> <https://lists.sudoroom.org/pipermail/sudo-discuss/2014-August/007369.html>].
> Could you please look them over and write us a few formal-sounding
> sentences that boil down to "hello I am a real electrician and I say these
> plans are solid"? This will help us make the landlord happy so he will let
> us do them. Thank you!! [1]
> https://lists.sudoroom.org/pipermail/sudo-discuss/2014-August/007369.html
> -- Best Regards, Cere Davis ceremona at gmail.com ------------------- GPG
> Key: http://taffy.findpage.com/~cere/pubkey.asc GPG fingerprint (ID#
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>
>
>
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