ELMC Master Electrician Code 251-275 Questions With Complete Solutions

What is the MAXIMUM allowable voltage that conductors within electrical nonmetallic tubing (ENT) may carry? a. 1000 b. 2000 c. 600 d. 240 correct answer: 1000 NFPA 70 : NEC 2017 : 300.2, 362.1 Unprotected cable is to be installed in holes bored in wood studs. Each hole shall be bored so that the edge of the hole is what minimum distance for the edge of the stud? a. 2 b. 1 c. 1-1/2 d. 1-1/4 correct answer: 1-1/4 NFPA 70 : NEC 2011 : 300.4.A.1 Given: Only the following type THW conductors are all installed in an auxiliary gutter. 8, size 1 AWG conductors; 7, size 2 AWG conductors; 4, size 3 AWG conductors; 6, size 6 AWG conductors. What minimum size auxiliary gutter is required for these 25 conductors? a. 4 inch x 4 inch b. 12 inch x 12 inch c. 6 inch x 6 inch d. 8 inch x 8 inch correct answer: 6 inch x 6 inch NFPA 70 : NEC 2011 : 366.22 & chapter 9 Table 5 Which of the following is heat and moisture resistant? a. TFE b. RHH c. XHH d. USE correct answer: USE NFPA 70 : NEC 2011 : Table 310.104.A What should be done if the motor is running in the wrong direction? a. reverse the field connection b. ? c. ? d. ? correct answer: reverse the field connection NTV mike holt basic elec theory page 296 20.12 In bathrooms, what is the maximum distance from the outside edge of each basin that an outlet can be installed? a. 4 feet b. 5 feet c. 6 feet d. 3 feet correct answer: 3 feet NFPA 70 : NEC 2011 : 210.52.D What is the primary protection of a transformer that is 600 volts,