Steel framing has two major drawbacks: ____.
A. high cost and much lower energy performance
B. high cost and low product availability
C. difficulty to handle and low energy performance
D. difficulty to handle and low product availability
Answer: A
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Type ____ conductors are mineral insulated and sheathed in a gas-tight and watertight metal tube.
A. UF B. AC C. NMC D. MI
Answer the following statement(s) true (T) or false (F)
1. Circuit breakers are sometimes used as switches for lighting in a building. 2. Arc-fault interrupters are smaller than standard circuit breakers. 3. If two conductors with voltage between them are accidentally connected together, arcing generally will occur. 4. The rules for mobile homes and manufactured homes are now the same as for other dwellings. 5. There is a new requirement that all switchboards and panelboards in other than one-family and two family dwellings be marked to indicate the device or equipment where the power of a feeder originates.
Using the method of sections, determine the forces in the bars listed below the figure.
The minimum size of an equipment grounding conductor for feeder taps is determined
A. based upon the rating of the overcurrent protection at the load end of the feeder tap. B. based upon the ampacity of the tap conductors from Table 310.15(B)(16). C. based upon the ampacity of the feeder to which the tap conductors are connected. D. based upon the rating of the overcurrent protection on the supply side of the feeder conductor.