Master Electrician Class Questions and Answers (Graded A+)

branch circuit - ANSWER-That portion of a wiring system extending beyond the final overcurrent device is called the: Calculated load - ANSWER-The final sum of the computed loads, based on the minimum code requirements, is the Resistance - ANSWER-As compared to #10, a #8 wire of the same Iength has less: 0.001 inch - ANSWER-One circular mil is the area of a circle whose diameter is: 1,000,000 CM - ANSWER-6. A round bus-bar one inch in diameter, has a circular mil area of: four times as great - ANSWER-7. A copper wire with twice the diameter of another wire has a current carrying capacity: 10.4 - ANSWER-The specific resistance of copper wire @ 20° C in ohms per circular mil ft. is permit current to flow - ANSWER-Conductance of an electric circuit is that property that will: 1O ohms - ANSWER-The equivalent value of 0.1 mho is directly proportional to its length - ANSWER-13. The resistance of copper wire is: Feeder - ANSWER-The portion of a wiring system between a point of distribution and the branch circuit overcurrent device is locking - ANSWER-GFCI protection at a carnival is not required for equipment at circuit if the receptacle is of the ____________type not less than 1 1/4 in. from - ANSWER-3. Where cables or nonmetallic raceways are installed through in joists, rafters, or wood members;holes shall be bored so that the edge of the hole is the nearest edge -of the wood member. located on a balcony accessible only to qualified persons located in a room only accessible to qualified persons elevated 8 ft or more above floor or other working surface - ANSWER-4. To guard live parts over 50V but less than 600V, equipment is permitted to be 12Ft - ANSWER-6. Overhead feeder conductors shall have a minimum __________ vertical clearance over residential property and driveways, as well as those commercial areas not subject to truck traffic, where the voltage is limited to 300 volts-to-ground. 36 inches - ANSWER-Where rear access is required to work on de-energized parts on the back of enclosed equipment, a minimum working space of horizontally shall be provided. 50' - ANSWER-What is the maximum run length of a 18AWG fixture wire that is tapped on to a 20 amp branch circuit? power supply failure - ANSWER-When the service disconnecting means is a power-operated switch or circuit breaker, it shall be able to be opened by hand in the event of a 2 in of concrete - ANSWER-Conductors are considered outside a buildings when they are buried under not less than 8 - ANSWER-In straight pull, the length of the box shall not be less than. ____times the trade size of the largest raceway. 18" - ANSWER-At least one receptacle outlet shall be installed within of the top of a show window for each 12 linear feet measured horizontally across its length