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If you do not have a complete and thorough understanding of what it is that you are messing with then you DO NOT need to be messing with it. And this is to avoid someone from painful shock/muscular paralysis/extreme breathing difficulties or even death caused by the current passed directly through the heart. (Added by Mr. Domingo S. Amancio, ALS Mobile Teacher, Dalaguete, Cebu, Phillipines)

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11y ago
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Q: What is the most important rule in electrical safety?
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