1956 IBM hard drive
wrote in message
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On Mon, 10 Dec 2007 16:35:14 -0800, "Calif Bill"
wrote:
The original room had a missed wired plug for 110V 30 amp for a card read
punch.
That's unusual. IBM never had any 110v equipment in the computer room.
We didn't even bring a neutral to the distribution panels. Even the
smallest stuff was 240 or 208v. Later they did start putting in 120v
plugs for terminals but a lot of places just plugged them into the
convenience outlets in the frames. (transformer fed)
We had lots of 120V stuff.
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