When is equipment ground-fault protection required?
What will be an ideal response?
Equipment ground-fault protection is now required for all solidly grounded electrical systems with a disconnecting means rated 1000 amperes or more where the ungrounded conductors operate at over 150 volts to ground.
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Figure 41-4
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In the accompanying figure, what happens when the pressure switch opens?
What will be an ideal response?
Determine the number of 8-inch-high by 8-inch-wide by 16-inch-long concrete blocks required to complete the wall in Figures 11.23 and 11.24. The overhead doors are 10 feet wide by 12 feet high. If lintel blocks are required wherever the #4 horizontal bars are located and above the doors, how many plain blocks and how many lintel blocks are needed for the wall?
What will be an ideal response?
The most common EDM configuration is ____________________ EDM.
Fill in the blank(s) with the appropriate word(s).
Information on required start-up checks and inspection guidelines for specific mobile cranes is found in _____.
a. ANSI Standard A29.5 b. OSHA 1926, Subpart N, 1926.550 c. ANSI Standard B30.5 d. the manufacturers' manuals