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  • 21 Aug, 2019

  • By, Wikipedia

File:Light-plant-Fig1198-Page989-Ch45-Hawkins-Electrical-Guide.png
The storage battery has 16 cells supplying up to 4.5 amps of power for 7.5 hours at 32 volts. This can supply 7 20-watt bulbs or 9 15-watt bulbs for 7.5 hours.

The switchboard is arranged so as to give 24 hours a day continuous service. It is customary to run the engine for most of the lighting period and just use the batteries late at night.

Scanned by Google Books:

https://books.google.com/books?id=yyEVAAAAYAAJ&pg=PA989#v=onepage&q&f=false
Date Source Hawkins Electrical Guide - Volume 3, Chapter 45, Page 989, Figure 1198 Author Nehemiah Hawkins, copyright 1917, printed in the USA

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