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<p><font size="+1">I have a Kohler 110 DC generating plant. I think
it's 1500W. Always wondered what I could run with it besides
light bulbs. Doug T</font><br>
</p>
<div class="moz-cite-prefix">On 12/21/2019 8:10 AM, Stephen Offiler
wrote:<br>
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<div dir="ltr">I'll admit I had no idea there was ever much of a
DC grid, beyond the earliest of early days when Edison
supported DC and Tesla supported AC and electric power was an
untamed frontier.
<div><br>
</div>
<div>Carl's comment about working with AC vs DC might refer to
the workings of the appliance. Agreed, generally, volts
times amps equals watts and it doesn't matter AC vs DC.
That is 100% true for resistive loads like lightbulbs. It
is not quite true for inductive loads like motors, but OK as
a first-pass approximation.</div>
<div><br>
</div>
<div>The major difference with having DC around is safety. If
you get zapped by 120VAC, the reversing polarity means
crossing thru 0 volts 120 times per second, which tends to
kick you away. DC does not reverse, and the steady voltage
tends to lock up your nervous system and kill you. Back in
the early days, conductor insulation was not exactly up to
modern standards, nor was there much in the way of safety
watchdogs like Underwriter's Labs etc., so electric shock
was more of a threat.</div>
<div><br>
</div>
<div>Steve O.<br>
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<div><br>
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<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri, Dec 20, 2019 at 4:37
PM <<a href="mailto:szabelski@wildblue.net"
moz-do-not-send="true">szabelski@wildblue.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">Working with a 115VDC
system would be no different than working with a 120VAC
system. You house has a 100A or 200A service, that doesn’t
mean you can draw that current at every wall plug. Your
breakers would limit the current and trip if you try to pull
more than rated.<br>
<br>
I would guess that a house back in the day of 115VDC had a
standard series of four cell fuse blocks with 2, 3, 5, 10,
and maybe a couple of 15A fuses. When I was a kid in
Detroit, our house had such a set up for our old 80A 120VAC
house service (it was mounted on the back porch, outside,
but sheltered from the weather.). Fuses were still in use up
to the 40’s - 50’s.<br>
<br>
Carl<br>
----- Original Message -----<br>
From: <a href="mailto:szabelski@wildblue.net"
target="_blank" moz-do-not-send="true">szabelski@wildblue.net</a><br>
To: Antique Tractor Email Discussion Group <<a
href="mailto:at@lists.antique-tractor.com" target="_blank"
moz-do-not-send="true">at@lists.antique-tractor.com</a>><br>
Sent: Fri, 20 Dec 2019 16:05:51 -0500 (EST)<br>
Subject: Re: [AT] [OT] Has anyone seen one of these??<br>
<br>
Cecil, this would only be about 5 to 6 amps at 115VDC. If
you want it to run, you’ll have to put 10 car batteries in
series to get it to do so.<br>
<br>
Putting 10 car batteries in series could give you a
potential DC current equal to about the current from the
weakest battery.<br>
<br>
Batteries add voltage when in series, and maintain the
current rating of one individual battery. Batteries in
parallel maintain the voltage level of one individual
battery, and the current add together.<br>
<br>
On the Abrams we used a series-parallel combination of six
12V, 100 AH, batteries to get a battery system rated at 24
VDC and 300 AH. Three sets of 2 batteries in series,
connected in parallel.<br>
<br>
<br>
Carl<br>
<br>
<br>
----- Original Message -----<br>
From: Cecil Bearden <<a
href="mailto:crbearden@copper.net" target="_blank"
moz-do-not-send="true">crbearden@copper.net</a>><br>
To: <a href="mailto:at@lists.antique-tractor.com"
target="_blank" moz-do-not-send="true">at@lists.antique-tractor.com</a><br>
Sent: Fri, 20 Dec 2019 09:42:32 -0500 (EST)<br>
Subject: Re: [AT] [OT] Has anyone seen one of these??<br>
<br>
OK, this is old, I have found ads dating back to 1912
showing this. It <br>
is an old shop vacuum. When it was mounted on casters it
was used in <br>
the home. US radiator corp owned the invincible vacuum mfg
co. I don't <br>
know if I can use it for cleaning out the tractor cab, the
motor states <br>
3/4 hp on the nameplate. It also mentions DC, so I have to
inspect when <br>
I get it this afternoon. 115 V on D.C would knock you into
the next <br>
room.... My wife wants to turn it into a table lamp....
I am more <br>
of a purist, I want to see it work....<br>
<br>
Cecil<br>
<br>
<br>
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