Re: (ET) Tool receptacle

["RJ Kanary" <rjkanary nauticom net>]

It took well over 300A to vaporize the fuse link on the power disconnect.
Transaxle in second speed [L], traction motor at fourth speed. [no field
weakening, armature resistors all bypassed], mower deck operating in four
inch high grass, climbing a hill that was easier to fall down than to walk
down. It was spectacular, since I had the control cabinet cover off.


RJ Kanary
Member TRNi  Since 1998
ASE® Certified Master Auto Technician

rjkanary nauticom net

----- Original Message -----
From: "Christopher Zach" <czach computer org>
To: "Elie, Larry (L.D.)" <lelie ford com>; "RJ Kanary"
<rjkanary nauticom net>; "Elec-trak" <elec-trak cosmos phy tufts edu>
Sent: Monday, March 11, 2002 6:41 PM
Subject: Re: (ET) Tool receptacle


> Perhaps, however I have pulled some serious arcs just by shorting out my
> solar panel to test the amp ratings at short (yes you can do this without
> damaging a panel in any way). Even at 6-10 amps, I can draw a good arc of
> fire (and demolish test leads).
>
> I'd hate to try this with the 600 to 1,00amps a string of T105's can
produce
> at short.
>
> Maybe the ET people were thinking "well, we are using small wire, it will
> heat up and limit the current". My problem is I would want to go for max
> efficiency, so the wires from my ET to the charger are ten gauge, and 
> will
> be six gauge once I get the new shed built and the pernament conduit in.
>
> And the wire I would run to the inverter plug would be at least four 
> gauge
> to minimize voltage loss. That would cause a problem with the ET.
>
> Hm. Any idea what the max reasonable amperage an E20 is expected to draw
> (going up a hill, etc). Maybe I should put a 200-300amp series fuse in
line
> with the batteries.
>
> Chris
>
>
>
> ----- Original Message -----
> From: "Elie, Larry (L.D.)" <lelie ford com>
> To: "'Christopher Zach'" <czach computer org>; "RJ Kanary"
> <rjkanary nauticom net>; "Elec-trak" <elec-trak cosmos phy tufts edu>
> Sent: Monday, March 11, 2002 9:30 AM
> Subject: RE: (ET) Tool receptacle
>
>
> > Yes, the rating is low.  No, it isn't fused.  My guess is; they tested
the
> failure mode, and the connector fails OPEN.  That means the connector IS
the
> fuse.  That also explains why they used a little 20A connector.  Ratings
are
> interesting; as I recall, the rating is 150% for 1.5 hours, 200% for
> minutes, and 120% for many hours at room temperature.  Had they chosen a
> bigger connector, they would have required a fuse.  BTW, all the
accessories
> I have seen for the connector use 16 Ga wire.  20 A would be pretty
warm...
> >
> > On the Tripp-Lites; I contacted the vendor over a year ago.  I was
really
> interested in the combined fast-charger/inverted.  I no longer need this
> sort of sophistication (got some 36V accessories, and improved the
charger),
> but a better charger is just as important as a big inverter.
> >
> > Larry Elie
> >
> >
> > -----Original Message-----
> > From: Christopher Zach [mailto:czach computer org]
> > Sent: Friday, March 08, 2002 9:36 PM
> > To: RJ Kanary; Elec-trak
> > Subject: Re: (ET) Tool receptacle
> >
> >
> > Yep, I have the homeowner's manual; I just didn't see a fuse and it
blows
> my
> > mind (that's a good pun :-) that they didn't fuse an outboard outlet.
What
> > happens if the chainsaw shorts? Melts in your hand?
> >
> > That's technically a problem for me since the Elec-Trak's 20amp outlet
> plugs
> > directly into the outboard side of the Solarex charger. Thus if the
> charger
> > were to ever short, the full force of the tractor's battery pile would
> > incinerate the controller and cable. My panels and the rest of the
shed's
> > power infrastructure are safe because they are behind a 20amp 10k AIR 
> > DC
> > rated fused disconnect.
> >
> > I guess I'll just have to put in a second RK5 30amp disconnect box at
the
> > plug end for the tractor, since it's technically an unfused power
source.
> > And maybe a little sanity fuse in the tractor itself. This will make
four
> > disconnect boxes on a simple shed.
> >
> > Drat.
> >
> > Chris
> >
> > ----- Original Message -----
> > From: "RJ Kanary" <rjkanary nauticom net>
> > To: "Christopher Zach" <czach computer org>; "David Roden (Akron OH
USA)"
> > <roden ald net>; "Elec-trak" <elec-trak cosmos phy tufts edu>
> > Sent: Friday, March 08, 2002 9:15 PM
> > Subject: Re: (ET) Tool receptacle
> >
> >
> > > Christopher, SO-2 can be interrupted by CB-2, the one primarily
intended
> > for
> > > protection in event of a diode shorting on the charger,[on the
negative
> > > side], or CB-1, that husky, 100 to 125 Amp      Klixon® beast, that
> lives
> > on
> > > the traction motor,[positive side].
> > >        Neither can be expected to provide over current protection to
> that
> > > outlet. It is, for all intents and purposes, unfused.
> > >       If you have not already done so, order the Homeowner's Service
> > Manual
> > > from Tech Parts. The schematics are large enough, and clear enough, 
> > > to
> > make
> > > puzzling out what goes where and why pretty straight forward.
> > >
> > >
> > > RJ Kanary
> > > Member TRNi  Since 1998
> > > ASE® Certified Master Auto Technician
> > >
> > > rjkanary nauticom net
> > >
> > > ----- Original Message -----
> > > From: "Christopher Zach" <czach computer org>
> > > To: "David Roden (Akron OH USA)" <roden ald net>; "Elec-trak"
> > > <elec-trak cosmos phy tufts edu>
> > > Sent: Friday, March 08, 2002 8:01 PM
> > > Subject: Re: (ET) Tool receptacle
> > >
> > >
> > > > Actually there might be a solution (there's always a solution :-)
> > > >
> > > > Way back in my pile of junk is an old DEC TC01 DecTape unit from 
> > > > the
> > > 1960's.
> > > > This unit used the same twist-lock plug; however it had a third
round
> > pin
> > > in
> > > > the center.
> > > >
> > > > That was the ground. My guess is Hubbel built an ungrounded version
> (the
> > > one
> > > > on the ET) and one that had a hole in the center for plugs with
three
> > > > prongs. As per NEC codes, one could plug an ungrounded device into 
> > > > a
> > > > grounded receptacle, but one could not plug a grounded device into
an
> > > > ungrounded receptacle (think normal 2 and three prong outlets)
> > > >
> > > > Thus if I can find one of these, I could retrofit the tractor, have
my
> > > > ground (which would be nice, because someday this system will 
> > > > charge
> off
> > > > 20amps of solar) and plug in ET devices when needed.
> > > >
> > > > Anyone know if that outlet is fused with a 20-30 amp fuse?
> > > >
> > > > Chris
> > > >
> > > > ----- Original Message -----
> > > > From: "David Roden (Akron OH USA)" <roden ald net>
> > > > To: "Christopher Zach" <czach computer org>
> > > > Sent: Friday, March 08, 2002 11:25 AM
> > > > Subject: Re: (ET) Tool receptacle
> > > >
> > > >
> > > > > On 7 Mar 2002 at 19:18, Christopher Zach wrote:
> > > > >
> > > > > > Kind of how you will not find two prong electrical outlets
> anymore;
> > > > > > installing one is pretty much a violation of current NEC codes.
> > > > >
> > > > > This is generally correct.  Note though that in an older home 
> > > > > with
> > > > > ungrounded wiring, NEC prohibits installation of a 3-pin outlet 
> > > > > as
a
> > > > > replacement for a defective 2-pin, unless a ground is run to the
> box.
> > > > There
> > > > > is some question in my mind about whether installing a 2-pin
outlet
> is
> > > > > permitted or not -- this is unclear to me.  However, in such 
> > > > > cases
> the
> > > > code
> > > > > explicitly permits the installation of a GFI ~without~ ground 
> > > > > (yes
> > they
> > > do
> > > > > still function that way), provided that the outlet is labeled "no
> > > > equipment
> > > > > ground."  This is what I do when replacing the outlets in my
current
> > > home
> > > > > (circa 1920).
> > > > >
> > > > >
> > > > > David Roden - Akron, Ohio, USA
> > > > > 1991 Solectria Force 144vac
> > > > > 1991 Ford Escort Green/EV 128vdc
> > > > > 1970 GE Elec-trak E15 36vdc
> > > > > 1974 Avco New Idea 36vdc
> > > > > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
=
> =
> > > > > Thou shalt not send me any thing which says unto thee, "send this
to
> > all
> > > > > thou knowest."  Neither shalt thou send me any spam, lest I smite
> > thee.
> > > > > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
=
> =
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