Wrenches, William I did a few back up systems for data hubs, we had 250+ kWhr systems. We had to have a firewall between the batteries and everything else. We used copper stock 1/2 x 2" and 20' long, each bank connected to the buss with its own 250 a breaker, the buss was above the batteries mounted to SS strut using 1000 volt insulators on both positive and negative. The power conditioners were on the opposite side of the wall again all connected to the buss going to each unit and again protected. Was very clean, no line loss, very clean and was duplicated in several locations. We also had a 125 k cummins genny outside that would take over to keep us all connected. Jerry PS, we did not tap and we used brass bolts and nuts, l dont recall why but it may have not been able to torg enough.
On Fri, Dec 2, 2022, 12:42 PM William Miller via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Colleagues: > > > > I am gearing up to tap some more copper. I assume this is a pertinent > subject since bus bars are going to be needed frequently for any storage > work. > > > > I bought the fancy drill press with the tapping function and I am setting > it up. I ran a few tests and the functionality of the tool is pretty > amazing. I still need to work on programming it to reverse when needed. I > am close. I also ordered a cross vise for part holding. > > > > I found this tutorial > <https://www.youtube.com/watch?v=bkrUzGooA9k&ab_channel=HaasAutomation%2CInc.> > on line that has provided me with some valuable insight on different styles > of taps. > > > > William > > > > Miller Solar > > 17395 Oak Road, Atascadero, CA 93422 > > 805-438-5600 > > www.millersolar.com > > CA Lic. 773985 > > > > > > *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On > Behalf Of *Michael Morningstar via RE-wrenches > *Sent:* Monday, September 12, 2022 7:39 PM > *To:* RE-wrenches > *Cc:* Michael Morningstar > *Subject:* Re: [RE-wrenches] Large current battery combiners, UL Listing > > > > No, I haven't. I'll do some testing tomorrow as we have 60 holes/taps to > do in the above mentioned bussing > > > > On Mon, Sep 12, 2022 at 7:54 AM frenergy via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > > Michael, > > Are you using kerosene as a cutting fluid? We've had > better luck with that in softer than steel metals. > > Bill > > Feather River Solar Electric > Bill Battagin, Owner > 4291 Nelson St. > Taylorsville, CA 95983 > 530.284.7849 > CA Lic 874049 > > On 9/11/2022 7:00 PM, Michael Morningstar via RE-wrenches wrote: > > We've gotten around needing UL listings for one-off in house > > fabrication by running things through a licensed engineer. Right now > > we are building a gutter bus which has two 1/2" x 4" x 20' copper bars > > in a 10" x 10" gutter. We are using 2" x 9" x 9" UDPM plates with > > slots routed out for the bars as insulators. This is for 24 Discover > > AES and 8 Sol-Ark's. It usually costs about 1K to have an engineer > > sign off on our designs. > > > > I'd be interested in learning tricks for tapping 3/8" in thick copper. > > I've never been able to get consistent results and resort to > > thru-bolting. > > > -- > This email has been checked for viruses by Avast antivirus software. > www.avast.com > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > > > > -- > > Michael Morningstar > > > > Morningstar Electric > > PO Box 1494 > > Mount Shasta, CA 96067 > > 530-921-0560 > > mjmornings...@gmail.com > > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > >
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