The grounded-circuit conductor is permitted to ground equipment under which of the following conditions?
A. On the supply side or within the enclosure of the ac service disconnecting means
B. On the supply side or within the enclosure of the main disconnecting means for separate
buildings
C. On the supply side or within the enclosure of the main disconnecting means or
overcurrent devices of a separately derived system
D. At all of the above locations
D. At all of the above locations
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Which types of oil feed system are generally self-purging?
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Seam welds are dimensioned by specifying either size or ____________________.
Fill in the blank(s) with the appropriate word(s).