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NEC Article ______ defines breakers and fuses. - Correct Answers ✅According to NEC Article 100, a device that opens and closes a circuit by nonautomatic means automatically closes for a predetermined overcurrent. Annex _____ of NEC covers conduit fill. - Correct Answers ✅Annex C of NEC covers conduit and tubing fill for conductors and fixture wire fill. NEMA stands for National Electrical Manufacturers Association - Correct Answers ✅True - NEMA is the acronym for National Electrical Manufacturers Association. What does it mean when a receptacle has "NEMA 5-20R" on it? - Correct Answers ✅A receptacle with NEMA 5-20R on it has an amperes rating of 20, will take a NEMA-5-15P or NEMA-5-20P plug, and has a voltage rating of 125. NEC Tables 310-10 through 310-21 provide information on. - Correct Answers ✅The sizes of copper and aluminum wire, as well as the coating of wire that has fewer than three current carrying wires in a cable or conduit or that is buried in the earth. Which NEC tables(s) cover(s) the fill of metal boxes? - Correct Answers ✅The fill of metal boxes appears in NEC Tables 314.6 A and B. NEC Article _____ address EMT. - Correct Answers ✅NEC Article 358 covers EMT. Which NEC articles cover the installation requirements for RMC, IMC, and EMT? - Correct Answers ✅NEC Articles 342, 344, and 358 outline the installation requirements of RMC, IMC, and EMT.
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IN NEC 2008, what does Table 370.6A cover? - Correct Answers ✅Shows in two columns (milimeters and inches), how many wires in trade size you can place in a box. What NEC table would you go to to find trade size of conduit and raceway size? - Correct Answers ✅Chapter 9, Table 4 outlines trade size of conduit as well as raceway size. NEC Articles _____ and _____ covers metallic and non-metallic raceways in buildings.
- Correct Answers ✅NEC Article 386 covers metallic or metal raceway; NEC Article 388 covers PVC pipe. The Panel Board requirements for Application in Construction appear in NEC Article? - Correct Answers ✅NEC Article 408 covers panel board applications. The smaller kitchen counter requiring a receptacle is _____ inches. - Correct Answers ✅A 12in. counter requires a receptacle because it holds small appliances. What new code is needed for protection in all habitable spaces? - Correct Answers ✅According to new codes, ARC fault protection is needed many additional parts of the house. A 12-foot hallway requires one receptacle to meet code. (True or False) - Correct Answers ✅True, One is required, Two are suggested.
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Which NEC reference identifies wire sizing and the temperature a wire can handle in amps? - Correct Answers ✅NEC Tables Annex C1 and C2 identify both wire sizing and the temperature a wire can handle in amps. Define a grounding system according to NEC. - Correct Answers ✅A gounding system is connected to the ground or to a conductive body that extends the ground connection. What is the topic of NEC Section 250-122? - Correct Answers ✅Is dedicated to the sizes of the grounding conductor What is the NEC definition of a circuit breaker? - Correct Answers ✅A device designed to trip when an overcurrent is detected. NEC Section 300-13 provides information on? - Correct Answers ✅Mechanical and Electrical continuity conductors. What is the subject of NEC Section 250-2D? - Correct Answers ✅Bonding jumpers ______ are the subject of NEC Section 680-20. - Correct Answers ✅Electrical installations at permanently installed pools. Which NEC Section covers equipment grounding conductors. - Correct Answers ✅NEC Section 250-
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Which NEC sections covers identification of equipment grounding conductors? - Correct Answers ✅NEC Section 250-119 1- Which NEC Section covers ground terminal identification. - Correct Answers ✅NEC Section 250- Bonding is the establishment of ______ connection between metal parts. - Correct Answers ✅Reliable NEC Section 250-134 provides information on what topic? - Correct Answers ✅Equipment fastened or connection between metal parts. Equipment grounding conductor _____ is (are) discussed in NEC Section 250-130. - Correct Answers ✅Connections NEC Section 250-118 states that a grounded conduct must run _____ flexible conduit. - Correct Answers ✅inside NEC Section _____ oversees bonding of flexible type conduit. - Correct Answers ✅NEC Section 250.118(5) Which NEC article covers cable trays? - Correct Answers ✅NEC Article 392 What is the proper procedure for bonding a motor conduit with metal flex? - Correct Answers ✅A bonding jumper should be installed inside or outside raceway within 6ft. of attachment. (NEC 250.118)
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Above sidewalks accessible by pedestrians, a service drop not over 600V must be at least _____ft. high. - Correct Answers ✅10ft. What is the service drop distance, in feet, of a 200-amp service crossing residential property? - Correct Answers ✅12ft. The required clearance for a 400-amp service drop across a major roadway is? - Correct Answers ✅18ft. Describe the information covered in NEC Article 230.9 (A) - Correct Answers ✅Covers clearances on buildings. According to NEC 230.9(A), an unsheathed service conductor must be _____ft. from a window that opens. - Correct Answers ✅3ft. Which NEC Article covers grounding? - Correct Answers ✅NEC Article 250 System and circuit grounding involves taking alternating current to ground? (True or False) - Correct Answers ✅True The process of equipment _____ exposes current-carrying parts to a grounding system. - Correct Answers ✅Grounding Small power tools are protected in what two ways? - Correct Answers ✅1.Insulated Housings.
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- Ground prong on plugs. When bonding a plumbing system to the electrical system, it is not necessary to jump the water meter as this connection is built into the meter. (True or False) - Correct Answers ✅False, run ground wire from panel to copper water pipe then jump the water meter using grounding clamps. Explain the proper way to ground a subpanel in the same building. - Correct Answers ✅To ground a subpanel in the same building, run a four-wire system from main panel to subpanel. Discuss the proper way to ground a subpanel in another building. - Correct Answers ✅To ground a subpanel in the another building, run bare copper wire from subpanel to ground rod inside or outside. Something that is ______ is connected to ground or to a conductive body that extends the grounding connection. - Correct Answers ✅Grounded Describe a grounding conductor. - Correct Answers ✅A grounded conductor is a system or circuit that is intentionally grounded. Define the term grounding conductor. - Correct Answers ✅A grounding conductor is a conductor or circuit of a wiring system to a grounding electrode (ground rod). A(n) _____ is the fundamental particle of electricity. - Correct Answers ✅Electron
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_____ determines what size ground wire used on a service. - Correct Answers ✅The size of the largest conductor determines what size ground wire used on a service. A grounding conductor is what color? - Correct Answers ✅A grounding conductor is green. What is meant by the term isolated grounded reciprocal? - Correct Answers ✅An isolated grounded reciprocal is a separate ground from a device directly to a panel. Explain the process of cad welding? - Correct Answers ✅Exothermic welding involves the fusion of metal materials or copper to rebar. Electricians may use rebar as a grounding means. (True or False) - Correct Answers ✅True, Electricians may use rebar as a grounding means. Electricians must use a(n) _____ to properly connect number 4 copper to a ground rod. - Correct Answers ✅A Direct burial clamp is needed to properly connect number 4 copper to a ground rod. Using NEC Section 250-8, identify five methods of making connections. - Correct Answers ✅1. Listed Pressures Connectors
- Terminal Bars
- Pressure Connectors Listed As Ground and Bonding Equipment
- Exothermic Welding
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- Machine screw-type fasteners that engage not less than two threads or are screwed with nuts Underground service is simpler to troubleshoot and repair than overhead service? (True or False) - Correct Answers ✅Relative to underground service, overhead electrical service is simpler to troubleshoot and repair and is the easier option when running electricity across roadways, waterways, and right-of-ways. In NEC, Table _____ provides the sizing of grounding electrode conductors. - Correct Answers ✅NEC 250.66 provides the sizing of grounding electrode conductors Describe the process for bonding three 200-amp disconnects to make a proper grounding system. - Correct Answers ✅To make a proper grounding system using three 200-amp disconnects, use a ground wire of sufficient size to go from panel to panel with a lug, screw, or ground bar, if provided. In terms of AWG, what is the minimum grounding conductor size permitted? - Correct Answers ✅The smallest grounding conductor permitted is 6 awg or larger. The way to ground a transformer in a commercial building is to place a grounding rod inside the building? (True or False) - Correct Answers ✅False, The way to ground a transformer in a commercial building is to place a grounding rod outside or beneath the building.
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Name a common application for high impedance grounding. - Correct Answers ✅High impedance grounding is used for grounding radio towers. NEC 250.20(E) What is the proper way to test conduit for proper grounding? - Correct Answers ✅To test conduit for proper grounding, check ohms or use 120V receptacle and touch to ground to check for voltage. How does an NEC violation affect the occupancy of an existing installation? - Correct Answers ✅Per NEC 90.4, 510.2, and various local codes, occupancy is permitted in the event of a code violation as long as the occupancy remains unchanged and no hazardous condition exists. The maximum operating temperature of type FFH-2 fixture wiring is? - Correct Answers ✅Per NEC 402.3, FFH-2 fixture wiring is useable up to 75 degrees C NEC Article _____ addresses bonding requirements in healthcare facilities. - Correct Answers ✅NEC Article 517 FMT conductors are appropriate for battery storage areas. (True or False) - Correct Answers ✅False, Per 360.12, FMT is disallowed from battery storage areas A circuit that cannont cause a fire in a hazardous condition is called a(n) _____ system. - Correct Answers ✅An Intrinsically Safe System. When local ordinance superseded or administers NEC, NEC uses what phrase? - Correct Answers ✅"Authority Having Jurisdiction (AHJ)"
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A(n) _____ circuit is designed and created for one load. - Correct Answers ✅Dedicated NEC Chapter _____ specifies conduit fill requirements for fiber-optic cabling. - Correct Answers ✅Chapter 9 Which NEC chapter discusses fixture wiring and fixture wires. - Correct Answers ✅Chapter 3 NEC 90.1(A) states that the purpose of NEC is the "practical safeguarding of _____ from hazards arising from the use of electricity". - Correct Answers ✅people and property NEC Article 426 recognizes which three kinds of heating systems? - Correct Answers ✅Resistive, impedance, and skin effect. What is proper phase arrangement when wiring a three-phase panelboard? - Correct Answers ✅Per NEC 450.3, phases must arrange in a particular order: A, B, C, from left to right or from top to bottom as seen from the front. When installing an autotransformer, it is important to remember to insert an OCPD in series with the shunt winding. (True or False) - Correct Answers ✅False, Per NEC 450.4 a OCPD is no needed. Which NEC guidelines guarantee the best workmanship and safest installations possible. - Correct Answers ✅NEC 90.1(C)
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The NEC defines ampacity as, - Correct Answers ✅"the current, in amperes, that a conductor can carry continuously under the conditions of use without exceeding its temperature rating" Where does NEC list the types of insulation material deemed acceptable in wet locations? - Correct Answers ✅NEC 310. Leads to an unused current transformer should be. - Correct Answers ✅NEC 110.23 states that, "Unused current transformers associated with potentially energized circuits shall be short circuited." In what sections does NEC outline the requirements for appliance calculations? - Correct Answers ✅NEC 220.16 - 220.20 cover appliance calculations. Typically, transformers are available in one of two types: _____ and _____. - Correct Answers ✅Liquid Filled and Dry Versions NEC Chapter 9, Table 5, states, - Correct Answers ✅To locate wire type and size to be installed. Repeat for each conductor, keeping a running total. Derate by 40% to ge the total raceway area. NEC Chapter 9, Table 4, states, - Correct Answers ✅For a raceway to be used. Find a value for area larger than the raceway area calculated previously. The "3-ft. rule" for clearances around things like control panels is adequate. (True or False) - Correct Answers ✅False, Depending on the location and environment,
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3ft. may be insufficient clearance. While grouping apparatuses tightly may save space, repair and maneuvering options are limited should a device fail. When establishing ground clearance in new construction. It is best to make the ground clearance slightly more than the NEC-stated requirement to provide a margin for error. (True or False) - Correct Answers ✅True, It is a good idea to exceed the requirements by a foot or two. What Section discusses "clearance(s) from ground. - Correct Answers ✅NEC
Service drops must be installed so as to be "readily accessible." (True or False) - Correct Answers ✅False, Per NEC 230.24, Service drop connectors shall not be readily accessible. Extension cords are acceptable in wet areas. (True or False) - Correct Answers ✅True, Per NEC Article 400, only when rated for wet areas. The requirements for liquid-filled transformers are the same regardless of the liquid used in the transformer. (True or False) - Correct Answers ✅False, Per NEC 450.23-26 liquid-filled transformers have different requirements based on the dielectric fluid. NEC Article 526 helps electricians determine requirements for _____. - Correct Answers ✅Deicing systems
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The calculations for protecting motor circuits are the same as those for non motor circuits. (True or False) - Correct Answers ✅False, Protecting a motor and a motor circuit are two very different things Per NEC Article 410, luminaires may mount on drop-ceiling tiles. (True or False) - Correct Answers ✅False, ceiling tiles are never appropriate device support. The requirements for burying 240V conductors are found in NEC _____. - Correct Answers ✅NEC 300.5, provides requirements up to 600V NEC _____ outlines the requirements fo AC type (armored) cable. - Correct Answers ✅NEC 320 A garage door opener is considered an appliance for NEC purpose. (True or False) - Correct Answers ✅True, Per NEC 422. Appliances with motors over 0.125 hp must have a separate means of disconnect. (True or False) - Correct Answers ✅True, Per NEC 422. When running new work over old, hanging a second support from a primary support is acceptable practice. (True or False) - Correct Answers ✅True, Per NEC 300.11 hanging a second support when running new over old is acceptable and a common practice. Installation of a floor drain in a vault intended for wet transformer(s) is ______. - Correct Answers ✅Per NEC 450.46 only transformers over 100KW require a drain, however installing a drain in case of dielectric spills is good practice.
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A TVSS provides adequate protection against lighting strikes. (True or False) - Correct Answers ✅False, a TVSS is only for protecting against predictable anomalies, and short-duration spikes of high-voltage. It is possible to violate the NEC by tightening a bolt or fastener too tight. (True or False) - Correct Answers ✅True, all equipment must be installed per manufacturer's instructions and specifications, The apparatus is void and violates NEC if this is not done. When installing a cable tray, only the sections nearest the terminations must be grounded. (True or False) - Correct Answers ✅Per NEC 392.7(B) Bonding of all cable tray sections is required. Using aluminum wire with receptacles must be _____. - Correct Answers ✅Marked CO/ALR How would demand be calculated in a commercial environment in which a branch circuit could effectively handle 20 KW? - Correct Answers ✅Per NEC 220.13, use 100% of the first 10KW and 50% of the demand above 10KW. In this case, the demand factor would be 10,000 plus half the remaining 10,000 or 15,000W NEC allows how many disconnects per service entrance? - Correct Answers ✅Per NEC 225.34, a maximum of six disconnects are allowed per service entrance. In a given NEC section, Subsection (2) contains _____. - Correct Answers ✅Terms and Definitions
