Fill the given blanks regarding the location of operating handle with respect to ground.

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Chapter 27, Problem 36R

To determine

Fill the given blanks regarding the location of operating handle with respect to ground.

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Assume you are an electrical apprentice. The electrical foreman on the job tells you to connect some equipment grounding conductors to the ground bus that runs along the front bottom of a dead-front switchboard. The system is 480Y/277-volt solidly grounded wye. The building is still under construction, and a number of other trades are working in the building. The switchboard has already been energized, and it is totally enclosed except for two access covers near the front bottom where the ground bus runs. The ground bus already has the proper number of and size of lugs for the equipment gtrounding conductors. You ask permission to turn off the main power so that you can work on the connecdting the equipment grounding conductors to the ground bus without having to worry about accidentally touching the phase buses with your hands or with a screwdriver or wrench. The foreman says, :No” What wound you do?

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