Journeyman electrician exam prep

Journeyman electrician exam prep 1. What table provides sizes for bonding jumpers for AC systems? - Answer: 250.102(C)(1). 2. According to the NEC, how long must a load operate continuously to be classified as such? - Answer: At least three hours. 3. For using adjustment factors in Table 310.15(B)(3)(A), how many current-carrying conductors must be present in a raceway? - Answer: Greater than three. 4. Where in the NEC codebook can you find EMT sizes for specific numbers and sizes of conductors? - Answer: Annex C, Table C.1. 5. According to Section 210.20(A), what is the required overcurrent protection for branch circuits, including continuous loads? - Answer: Greater than 100% of the noncontinuous load plus 125% of the continuous load. 6. How close must Liquidtight Flexible Metal Conduit be fastened to each box or conduit termination? - Answer: Within twelve inches. 7. What does 314.28(A)(1) state regarding straight pulls in pull boxes for conductors sized 4 AWG or larger? - Answer: The box length should be greater than or equal to eight times the trade diameter of the largest conduit entering the box. 8. According to Chapter 9, note 4, what is the maximum filling for conduit nipples less than 24 inches in length? - Answer: 60 percent of their cross-sectional area. 9. In Table 348.22, what is the maximum number of insulated conductors allowed for 3/8 trade size Flexible Metal Conduit (FMC)? - Answer: 3. 10. How many general-purpose receptacles must guest rooms in hotels, motels, and dorms have that are readily accessible? - Answer: A minimum of two. 11. When branch-circuit conductors are inside a ballast compartment and within 3 inches of the ballast, what is the minimum required temperature rating for those conductors? - Answer: 90 degrees C. (Option b) 12. Class _____ locations are hazardous due to the presence of easily ignitable fibers or combustible flyings. - Answer: Class III (Option c). 13. Class _____ locations are those where flammable gases or vapors that can explode are present. - Answer: Class I. 14. Class ____ locations are defined by the presence of combustible dust. - Answer: Class II. 15. Conductors with _______ insulation have a greater ampacity when used in dry locations compared to wet locations. - Answer: THHW. 16. When calculating total load for buildings and determining the minimum branch circuit load for an exterior electric sign, what factor must be included? - Answer: Demand load (1.25). 17. What is the difference between Tables C.11 and C.11(A) regarding conductor numbers for Schedule 40 PVC? - Answer: The difference lies in compact versus stranded conductors. 18. According to 332.30, what is the minimum required support interval for Type MI cable? - Answer: At least six feet. What table sizes equipment grounding conductors for specific over current devices? ️250.122 Wye is another term for what kind of systems? ️Three phase What is the equation for voltage drop? ️VD=2KID/CM In the voltage drop equation, what is the value CM, and where is it found in the NEC codebook? ️Circular mile, chapter 9, table 8 Conductors installed under at least _______ inches of concrete are considered by NEC Section 230.6 to be outside the building. ️2 inches Conductors installed in electrically heated floors in bathrooms, kitchens, and in hydro massage bathtub locations shall be provided with what kind of protection? ️GFCI 424.44(E) With 90 kVA and 208Y, what is the current on each ungrounded phase conductor at full load? ️90kVA/(208X1.732) 250 amps For dwelling units, GFCI protection shall be provided for lighting outlets not exceeding 120 volts where installed in ️Crawl spaces 430.32 gives percentages for marked service factors on motors. For 40 degrees C or less and 1.15, what is the percentage you multiply by? ️125% 422.13 states fixed storage water heaters with a capacity of ____ gallons should be considered a continuous load for sizing branch circuits ️120 gallons 250.54(G) states when driving a ground rod and solid rock is encountered, the ground rod is permitted to be buried in a trench at least how deep? ️30 inches Section 210.11(C)(2) states at least one additional _____ amp circuit shall be provided to supply the laundry outlet in the laundry room ️20 ampere What section of the NEC discusses corrosion protection? ️300.6 300.6 says that where corrosion protection is necessary and the conduit is threaded in the field, the threads shall be coated with what? ️An electrically conductive, corrosion resistant compound 110.26 (E) discusses the space equal to the width and depth of the equipment and extending from the floor to a height of six feet above the equipment or to the structural ceiling. What is this called? ️Dedicated electrical space For single phase dwelling services, when sizing conductors, 100-400 amps, what do you multiply your ampacity by to derate? ️83 percent For stationary motors of 2 hp or less, and 300 volts or less, a general use switch having an ampere rating of _____ the flc rating of the motor is permitted to be used ️2 times 240.22 states no over current device shall be connected in series with any conductors ️The overcurrent device opens all conductors of the circuit, including the grounded and is designed so no pole can operate independently. 314.72(E) states that a suitable cover to cover an underground box is considered to weigh what and shall have what written on it? ️100 pounds "Danger - High Voltage - Keep out" When an industrial control panel is supplied from a 3 phase, 4 wire, delta connected electrical system,