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Unformatted text preview: Interrupter (GFCI) Part 1 (20 points) Briefly explain the following safety rules (10 points for each explanation): Ø། Never touch a bare wire which can be under voltage, especially, with your palm; if absolutely necessary, touch it with the outer side of your hand. In particular: ü༏ Why is it important which side of the hand to use? ANS> When the external currents exceed the “Let- go threshold” (e.g. 7mA), the muscles on the inner side of the hand involuntarily contract so that the person cannot open it until the electrical excitation is removed. ü༏ At what current levels the consequences for the human user may be different? ANS> The “Let- Go threshold” level, 7mA Ø། Before working with electricity, make sure that your hands are clean and dry. In particular: ü༏ Why is it important to dry your hands? ANS> Sweat is an excellent c...
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