V
Can Anybody Explain why 24VDC is Standard Power Source? Why not 20V or 26 VDC?
C
Curt Wuollet
6, 12, 24, 48 are standards because that was what you got with various combination of packaged lead acid batteries.
Started with the first widespread electric network, the telephone and for all I know, the telegraph before it.
To this day, telephone exchanges have battery rooms. That's also why we had 6.3 and 12.6 volt heater voltages on tubes and pilot lights, etc.
I guess there hasn't been a good reason to change.
Regards
cww
Started with the first widespread electric network, the telephone and for all I know, the telegraph before it.
To this day, telephone exchanges have battery rooms. That's also why we had 6.3 and 12.6 volt heater voltages on tubes and pilot lights, etc.
I guess there hasn't been a good reason to change.
Regards
cww
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