Re: [RE-wrenches] Butt End Connector Warning

[Jay via RE-wrenches]

Hi drake

Can you give us a part number or picture?

Thx
Jay

> On Oct 6, 2022, at 7:33 AM, Drake Chamberlin via RE-wrenches 
>  wrote:
> 
> Our electrical supplier seamlessly transitioned from crimp on butt end 
> connectors, that were listed for CU and AL, to unmarked ones that were 
> approved for copper only.
> 
> I became concerned since there was no marking. Calling two electrical 
> suppliers, the guys at the counter had to look up the device to learn that 
> they were listed for copper only. Talking to one of the counter guys, he 
> agreed that electricians were probably using these for aluminum.
> 
> Since the barrels will be insulated, it is not likely that inspectors will 
> see them. The connectors are made of coated copper. I wonder how much of a 
> problem this will be.
> 
> Drake
> 
> 
> 
> 
> 
> -- 
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Re: [RE-wrenches] Butt End Connector Warning

[John via RE-wrenches]

There used to be a chart – supplied years ago – that listed all the metals and 
showed what was compatible – or not compatible with different metals.

Sadly I can’t seem to find it, but one of the older guys might still have a 
copy of that chart.

Cheers – John Veix, N.Z.

 

From: RE-wrenches  On Behalf Of 
Christopher Warfel via RE-wrenches
Sent: Friday, 7 October 2022 2:42 am
To: re-wrenches@lists.re-wrenches.org
Cc: Christopher Warfel 
Subject: Re: [RE-wrenches] Butt End Connector Warning

 

You cannot use them with Al. The connection will disintegrate over time. I have 
pictures somewhere of mismatching rail bonding connectors that were gone in a 
year. Chris  

On 10/6/2022 9:32 AM, Drake Chamberlin via RE-wrenches wrote:

Our electrical supplier seamlessly transitioned from crimp on butt end 
connectors, that were listed for CU and AL, to unmarked ones that were approved 
for copper only. 

I became concerned since there was no marking. Calling two electrical 
suppliers, the guys at the counter had to look up the device to learn that they 
were listed for copper only. Talking to one of the counter guys, he agreed that 
electricians were probably using these for aluminum. 

Since the barrels will be insulated, it is not likely that inspectors will see 
them. The connectors are made of coated copper. I wonder how much of a problem 
this will be. 

Drake 






-- 

 Christopher Warfel
 ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
401-466-8978
  



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Re: [RE-wrenches] Frequency converter?

[Darryl Thayer via RE-wrenches]

Hi Chris, this a Darryl kluge approach.  Get a 50 Hz battery charger, a
LiFePO battery. And a off grid inverter.  20 kW is tough, maybe a 15 kW
inverter woild surfice. The battery plus battery chsrger should be sized
to handle 300 amps 48 volts.  15 kW / 50 volts= 300 A.
If the battery can handle 2C and the charger is 100 A you need 200 Ah
SORRY I AM JUST RATTLING

On Wed, Oct 5, 2022, 11:39 AM Chris Daum via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> Hey folks:
>
>
>
> A would-be customer is building a home in the Caribbean, where they
> utilize 230V, 50 hz.  But he cannot find the appliances he wants in that
> voltage & hertz range; is there some large frequency converter that he can
> hook to their (230V 50hz) grid that’ll convert it to 120/240V 60 hz?  He’s
> not too efficient, peak loads are apt to be around 20kwh….  Location is
> Dominica, with a reliable utility.
>
>
>
> Thanks for any ideas you may have!
>
>
>
> Best,
>
>
>
> Chris Daum
>
> Oasis Montana Inc.
>
> 406-777-4309 or 4321
>
> 406-777-4309 fax
>
> www.oasismontana.com
>
>
>
>
>
>
>
>
>
>
>
>
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Re: [RE-wrenches] Butt End Connector Warning

[Christopher Warfel via RE-wrenches]

You cannot use them with Al. The connection will disintegrate over time. 
I have pictures somewhere of mismatching rail bonding connectors that 
were gone in a year. Chris


On 10/6/2022 9:32 AM, Drake Chamberlin via RE-wrenches wrote:
Our electrical supplier seamlessly transitioned from crimp on butt end 
connectors, that were listed for CU and AL, to unmarked ones that were 
approved for copper only.


I became concerned since there was no marking. Calling two electrical 
suppliers, the guys at the counter had to look up the device to learn 
that they were listed for copper only. Talking to one of the counter 
guys, he agreed that electricians were probably using these for aluminum.


Since the barrels will be insulated, it is not likely that inspectors 
will see them. The connectors are made of coated copper. I wonder how 
much of a problem this will be.


Drake






--
            Christopher Warfel
                 ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
                                401-466-8978


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[RE-wrenches] Butt End Connector Warning

[Drake Chamberlin via RE-wrenches]

Our electrical supplier seamlessly transitioned from crimp on butt end 
connectors, that were listed for CU and AL, to unmarked ones that were 
approved for copper only.


I became concerned since there was no marking. Calling two electrical 
suppliers, the guys at the counter had to look up the device to learn 
that they were listed for copper only. Talking to one of the counter 
guys, he agreed that electricians were probably using these for 
aluminum.


Since the barrels will be insulated, it is not likely that inspectors 
will see them. The connectors are made of coated copper. I wonder how 
much of a problem this will be.


Drake





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