[RE-wrenches] Large current battery combiners, UL Listing

Michael Morningstar mjmorningstar at gmail.com
Mon Sep 12 19:39:25 PDT 2022


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 at 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.
>
>
> --
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-- 

Michael Morningstar


Morningstar Electric

PO Box 1494

Mount Shasta, CA 96067

530-921-0560

mjmorningstar at gmail.com
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