When using a straight ladder on a wall 20 feet high, the base of the ladder should be ____________________ feet from the wall.
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Q17: _ volts is generally the most dangerous
Q18: Electricians should avoid working with ladders made
Q19: A current of 20 to 30 milliamperes
Q20: A class _ fire involves burning metal.
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Q21: Which type of arc-fault is generally caused
Q23: Article _ of the NEC lists the
Q24: The AFCI contains a white pigtail that
Q25: The person most responsible for your safety
Q26: The current and temperature sensors permit the
Q27: _ is the force that pushes current
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