This article contains comprehensive discussions of which Rabbi said which and why he said it...
http://www.daat.ac.il/daat/english/journal/broyde_1.htmPreface
The topic of electricity in halacha is unique to our generation since there are no direct precedents in the Talmud or rishonim and the halachic discussion of this topic has been ongoing for less than 100 years. It is only since the technology developed and appliances became electrically powered that many of these questions arose... Over time many works were printed and it has become an established part of rabbinic literature. ("Electricity," Encyclopedia Talmudit 18:642).IntroductionThe advances of technology have posed practical challenge to decisors throughout the ages. One of the hallmarks of Jewish law is its ability - and desire - to assimilate technological advances into the practices of observant Jews. The application of ancient and venerated principles of halacha to new situations has been, and remains, one of the essential tasks of modern decisors of Jewish law. In the last one hundred years, this task has become considerably more difficult due to the rapid and frequent changes in the state of technology.
This article surveys halacha's response to one of the technological breakthroughs of the last 150 years: the invention of electricity. In particular, it explores halacha's understanding of the use of electricity on Shabbat and Yom Tov within the rubric of prohibited work (melacha).1 The technological revolution caused by the widespread use of electrical appliances has led to great discussion and debate within halachic circles. Thousands of monographs, responsa, and books have been written by halachic authorities in the preceding decades relating to the use of electricity on Shabbat and Yom Tov.2
This article is divided into five sections. The first discusses the basis for the prohibition of turning on or off incandescent lights on Shabbat. The second addresses the use of electricity where no light and heat is produced (e.g., turning on a fan). The third discusses the differences between Shabbat and Yom Tov for purposes of the rules developed in sections one and two. The fourth analyzes various specific appliances in light of the rules developed, and the fifth discusses various issues relating to the use of timers to control appliances on Shabbat and Yom Tov.
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