Re: [EVDL] Schneeveis battery load (was: Testing Leaf Modules)

2016-12-24 Thread John Lindsay via EV
You might like to run heavy gauge wire to the bucket and the thinner resistance 
wire entirely in the water. The insulated wire may melt outside the water. 

John Lindsay

> On 24 Dec 2016, at 5:20 pm, Lee Hart via EV  wrote:
> 
> With this type of load, remember that the rod or pipe is electrically live. 
> And so is the water that touches it!
> 
> I like using a coil of insulated copper wire, dunked in a bucket of water. 
> The wire can be considerably undersized for the current listed in a wire 
> table -- we *want* it to have excessive voltage drop and run hot. 
> the water keeps the insulation from melting.
> 
> --
> Excellence does not require perfection. -- Henry James
> --
> Lee A. Hart http://www.sunrise-ev.com
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Re: [EVDL] Schneeveis battery load (was: Testing Leaf Modules)

2016-12-23 Thread Lee Hart via EV
With this type of load, remember that the rod or pipe is electrically live. And 
so is the water that touches it!

I like using a coil of insulated copper wire, dunked in a bucket of water. The 
wire can be considerably undersized for the current listed in a wire table -- 
we *want* it to have excessive voltage drop and run hot. 
the water keeps the insulation from melting.

--
Excellence does not require perfection. -- Henry James
--
Lee A. Hart http://www.sunrise-ev.com
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Re: [EVDL] Schneeveis battery load (was: Testing Leaf Modules)

2016-12-23 Thread Cor van de Water via EV
The simple way to make a clamp and not needing to machine anything is to
use a copper strip (cut from a sheet of copper or a thin bus bar) that
you can wrap around the pipe and only one bolt is needed to make this
into a clamp that always fits. 

Cor van de Water 
Chief Scientist 
Proxim Wireless 
  
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-Original Message-
From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of ROBERT via EV
Sent: Friday, December 23, 2016 5:06 PM
To: Bill Dube; Electric Vehicle Discussion List
Subject: Re: [EVDL] Schneeveis battery load (was: Testing Leaf Modules)

Why machine a clamp.  Buy a grounding rod clamp.



From: EV  on behalf of Bill Dube via EV

Sent: Friday, December 23, 2016 12:06 PM
To: John Lussmyer; Electric Vehicle Discussion List
Subject: [EVDL] Schneeveis battery load (was: Testing Leaf Modules)

Bob Schneeveis had what I thought was the best solution. He had a ~6 ft
section of ~3/4" thinwall stainless steel tube. He put compression
fittings on the end to connect it up to a garden hose. He then machined
two large copper split clamps that slid smoothly over the tube with
large electrical connections on each. He would turn on the water, and
repostion the clamps to attain the desired resistance, tighten the thumb
screws to hold them in position on the tube, then turn on the current
from the battery.

 In went cold water. Out came hot water. It can be set for any load
you desire. Very nifty indeed.

 (Not UL approved. ;-) )

Bill D.

On 12/23/2016 11:04 AM, John Lussmyer via EV wrote:
> I'm planning on testing the capacity of some Leaf Modules I've picked
up.
> Any suggestions for a good 60A or so load for 8V?
>
> --
> Tigers prowl and Dragons soar in my dreams...
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Re: [EVDL] Schneeveis battery load (was: Testing Leaf Modules)

2016-12-23 Thread ROBERT via EV
Why machine a clamp.  Buy a grounding rod clamp.



From: EV  on behalf of Bill Dube via EV 

Sent: Friday, December 23, 2016 12:06 PM
To: John Lussmyer; Electric Vehicle Discussion List
Subject: [EVDL] Schneeveis battery load (was: Testing Leaf Modules)

Bob Schneeveis had what I thought was the best solution. He had a ~6 ft
section of ~3/4" thinwall stainless steel tube. He put compression
fittings on the end to connect it up to a garden hose. He then machined
two large copper split clamps that slid smoothly over the tube with
large electrical connections on each. He would turn on the water, and
repostion the clamps to attain the desired resistance, tighten the thumb
screws to hold them in position on the tube, then turn on the current
from the battery.

 In went cold water. Out came hot water. It can be set for any load
you desire. Very nifty indeed.

 (Not UL approved. ;-) )

Bill D.

On 12/23/2016 11:04 AM, John Lussmyer via EV wrote:
> I'm planning on testing the capacity of some Leaf Modules I've picked up.
> Any suggestions for a good 60A or so load for 8V?
>
> --
> Tigers prowl and Dragons soar in my dreams...
> ___
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archive | news | privacy policy | terms of service


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>

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[EVDL] Schneeveis battery load (was: Testing Leaf Modules)

2016-12-23 Thread Bill Dube via EV
Bob Schneeveis had what I thought was the best solution. He had a ~6 ft 
section of ~3/4" thinwall stainless steel tube. He put compression 
fittings on the end to connect it up to a garden hose. He then machined 
two large copper split clamps that slid smoothly over the tube with 
large electrical connections on each. He would turn on the water, and 
repostion the clamps to attain the desired resistance, tighten the thumb 
screws to hold them in position on the tube, then turn on the current 
from the battery.


In went cold water. Out came hot water. It can be set for any load 
you desire. Very nifty indeed.


(Not UL approved. ;-) )

Bill D.

On 12/23/2016 11:04 AM, John Lussmyer via EV wrote:

I'm planning on testing the capacity of some Leaf Modules I've picked up.
Any suggestions for a good 60A or so load for 8V?

--
Tigers prowl and Dragons soar in my dreams...
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