[AT] [OT] Has anyone seen one of these??

[szabelski at wildblue.net]

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.

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.

Carl
----- Original Message -----
From: szabelski at wildblue.net
To: Antique Tractor Email Discussion Group <at at lists.antique-tractor.com>
Sent: Fri, 20 Dec 2019 16:05:51 -0500 (EST)
Subject: Re: [AT] [OT] Has anyone seen one of these??

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.

Putting 10 car batteries in series could give you a potential DC current equal to about the current from the weakest battery.

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.

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.


    Carl


----- Original Message -----
From: Cecil Bearden <crbearden at copper.net>
To: at at lists.antique-tractor.com
Sent: Fri, 20 Dec 2019 09:42:32 -0500 (EST)
Subject: Re: [AT] [OT] Has anyone seen one of these??

OK, this is old, I have found ads dating back to 1912 showing this.  It 
is an old shop vacuum.  When it was mounted on casters it was used in 
the home.  US radiator corp owned the invincible vacuum mfg co.  I don't 
know if I can use it for cleaning out the tractor cab, the motor states 
3/4 hp on the nameplate.  It also mentions DC, so I have to inspect when 
I get it this afternoon. 115 V on D.C would knock you into the next 
room....   My wife wants to turn it into a table lamp....    I am more 
of a purist, I want to see it work....

Cecil


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