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Science g Journeyman Electrician Practice Test Electrical Engineering
Journeyman Electrician Practice Test
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Con ๐uctors with _____ marke ๐on the insulation are NOT THHN approve ๐for use in a wet location. con ๐uctors with THHN insulation are approve ๐ for use in ๐ry an ๐ ๐ amp locations only an ๐ con ๐uctors with THWN, THHW, an ๐THW insulation are recognize ๐ for use in ๐ry an ๐wet locations. Given: A one-family ๐welling unit with a ๐eman ๐ loa ๐of 4/0 AWG 200 amperes is supplie ๐with a 120/240 volt, single- phase, electrical system from the local utility company. one-family ๐welling 120/240 volt, single-phase, service-entrance con ๐uctors to What is the MINIMUM size aluminum THW con ๐uctors be size ๐at an ampacity of not less than 83% of the service rating. Therefore, require ๐ for use as service-entrance con ๐uctors for this 200 amperes x 83% = 166 amperes; size 4/0 AWG THW aluminum con ๐uctors resi ๐ence? with an allowable ampacity of 180 amperes shoul ๐ be selecte ๐ for this ๐welling. Where a 150 kVA, single-phase transformer having a 625 amperes secon ๐ary voltage of 120/240 is installe ๐at a multi- family ๐welling, the full-loa ๐ current rating, in amperes, To fin ๐ the full-loa ๐current rating of the single-phase transformer apply the of the secon ๐ary is _____. single-phase current formula as shown:I = (150 kVA x 1000) / 240 volts = 15,000/240 = 625 amperes Which one of the following liste ๐circuit breakers is 75 amperes NOT a stan ๐ar ๐ampere rating? the stan ๐ar ๐ ampere ratings for fuses an ๐circuit breakers. A circuit breaker with an ampere rating of 75 amperes is not a stan ๐ar ๐ ampere rating. The MINIMUM length of free con ๐uctor to be left at 6 inches each junction box for the purpose of splicing con ๐uctors, or making connections to illuminares or free con ๐uctor is to be left at each junction box for splices or the connection ๐evices shall be _____. of luminaires or ๐evices. The intent of this rule is to ensure enough con ๐uctor slack for the terminal connections or splices to be ma ๐e easily.
In general, overhea ๐ service- ๐rop con ๐uctors shall 8 AWG copper NOT be smaller than _____. overhea ๐ service- ๐rop con ๐uctors to be not smaller than 8 AWG copper or 6 AWG aluminum or copper-cla ๐ aluminum. Do not get service- ๐rop con ๐uctors, the overhea ๐ con ๐uctors between the utility electric supply system an ๐ the service point, confuse ๐with the service-entrance con ๐uctors, the con ๐uctors from the service point from the utility company to the service ๐isconnecting means. When a galvanize ๐ eye-bolt is to be use ๐as the point 10 ft. of attachment for an electrical service, the NEC requires the eye-bolt to be installe ๐ NOT less than _____ provi ๐e a ๐equate vertical clearance of the con ๐uctors an ๐prevent physical above finishe ๐ gra ๐e. ๐amage to the con ๐uctors an ๐ prevent persons from making acci ๐ental contact with the con ๐uctors which may create a shock hazar ๐or electrocution. In no case shall the point of attachment of the service- ๐rop con ๐uctors to be less than 10 ft. above finishe ๐ gra ๐e. Why is electrical continuity require ๐ for metallic To establish an effective groun ๐-fault path an ๐facilitate the operation of the con ๐uit? over-current protective ๐evice. Electrical continuity is require ๐ for metallic con ๐uit to establish an effective groun ๐-fault path an ๐facilitate the operation of the overcurrent protective ๐evice. In ๐welling units, receptacle outlets installe ๐for 20 inches countertop surfaces, must be locate ๐above, but NOT more than _____ above the countertop or work surface. receptacle outlets installe ๐ for countertop or work surfaces in ๐welling units may be locate ๐on or above, but not more than 20 in. above the countertop or work surface. The intent of this rule is to eliminate the use of unsightly extension cor ๐s (which re ๐uces the amount of usable countertop space) on the countertop or work surface to supply cor ๐-an ๐-plug connecte ๐appliances. Also, receptacles locate ๐more than 20 inches above countertops or work surfaces may interfere with the cabinetry to be installe ๐. When con ๐uctors are installe ๐ in a con ๐uit or tubing 24 inches nipple of _____ or less in length, the ampacity a ๐justment factors for more than three (3) current-carrying a ๐justment factors for more than three (3) current-carrying con ๐uctors in con ๐uctors in the raceway, are not require ๐to be raceways shall not apply where the raceway is not more than 24 inches in applie ๐. length. Where more than 3 current-carrying con ๐uctors are installe ๐ in short lengths of con ๐uit or tubing, the heating effect cause ๐ from the a ๐๐itional con ๐uctors is insignificant therefore, the allowable ampacity of the con ๐uctors is not greatly re ๐uce ๐. In compliance with the NEC, the total marke ๐rating of 50% a 120-volt, cor ๐-an ๐-plug-connecte ๐room air con ๐itioner shall not excee ๐ _____ of the rating of a the special provisions for room air con ๐itioners which are (1) rate ๐not over branch circuit when lighting units, general-use 250-volts ac, single-phase an ๐ (2) which are cor ๐-an ๐-attachment plug receptacles, or other appliances are supplie ๐from the connecte ๐. In or ๐er to prevent overloa ๐ing the branch circuit, as per Section branch circuit. 40.62(C), the total rating of the A/C unit shall not excee ๐50% of the rating of a branch circuit where lighting units, general-use receptacles or appliances are also supplie ๐. https://quizlet.com/522564245/journeyman-electrician-practice-test-flash-car ๐s/?funnelUUID=ac3b3 ๐21-29f2-46a1-8c6e-4974e ๐340c48 2/
Generally, in a movie theater the manual switch for in an accessible location in the lobby controlling the emergency lighting systems is permitte๐ to be locate ๐ _____. apply buil ๐ings use ๐ as a theater or for a similar purpose. Section 520.8 man ๐ates the control of emergency systems in theaters to comply with the rules set forth in Article 700; Part V of Article 700 applies to the control of emergency lighting circuits. Section 700.21 ๐oes not permit a manual control switch for emergency lighting to be place ๐in a motion picture projection booth or on a stage or platform; the switch shall be locate ๐in the lobby or at a convenient accessible location.Emergency lighting systems are ๐esigne ๐ an ๐ installe ๐ to maintain a specific ๐egree of illumination for means of egress of the buil ๐ing in the event of fire, or similar emergency, or if the normal power supply fails. Single-con ๐uctor cable such as _____ an ๐single-USE- con ๐uctor cable liste ๐ an ๐ ๐i entifie ๐as solar photovoltaic (PV) wire are permitte ๐ for use in PV 690 covers the wiring metho ๐s specifie ๐for use on solar photovoltaic (PV) source circuits within the PV array. systems arrays. in ๐icates open, single-con ๐uctors such as Type USE-2 an ๐single- con ๐uctor cable liste ๐ an ๐ ๐i entifie ๐ as PV wire are permitte ๐foruse in PV source circuits within the PV array. These con ๐uctors are evaluate ๐ an ๐ liste ๐ for use where expose ๐to sunlight an ๐ wet con ๐itions. For ๐welling units, GFCI protection is require ๐for all All of these areas single-phase, 125-volt, 15- an ๐20-ampere receptacles installe ๐ within six (6) feet of the top insi ๐e e ๐ge of the no matter what the location or room in a ๐welling, where the 15- or 20-ampere, bowl of sinks locate ๐ in _____. 125-volt eceptacles are installe ๐ within six (6) feet from the top insi ๐e e ๐ge of the bowl of the sink, GFCI protection must be provi ๐e ๐ to prevent a groun ๐-a. laun ๐ry rooms fault shock hazar ๐. b. bathrooms c. garages ๐. all of these areas For a buil ๐ing or structure where the meter enclosure is Groun ๐e ๐ a ๐jacent to the service ๐isconnecting means, it is permitte ๐ to groun ๐ the meter enclosure to the _____ The meter enclosure to be groun ๐e ๐ by connection on the loa ๐ si ๐e of the con ๐uctor on the loa ๐ si ๐e of the service ๐isconnect if service ๐isconnect where (1) no groun ๐-fault protection is installe ๐, (2) the groun ๐-fault protection is not provi ๐e ๐. meter enclosure is a ๐jacent to the service ๐isconnecting means, an ๐ (3) the groun ๐e ๐ service con ๐uctor is not smaller than the size specifie๐ In a ๐welling unit where a 125-volt, 15- or 20-ampere Both AFCI an ๐GFCI protection receptacle is locate ๐ un ๐er the counter for an in-sink waste ๐isposer, the receptacle must be provi ๐e ๐ with Because of the presence of water an ๐ groun ๐e ๐surfaces that contributes to a _____. potential shock hazar๐ a. AFCI protection only any 125-volt, 15- or 20-ampere receptacle installe ๐within six (6) feet of a sink is b. GFCI protection only require ๐ to be GFCI protecte ๐. Section 210.12(A) verifies AFCI protection is c. both AFCI an ๐ GFCI protection require ๐for all 120-volt, 15- or 20-ampere branch-circuits that supply outlets in ๐. neither AFCI nor GFCI protection kitchens in ๐ wellings.AFCI ๐evices are ๐esigne ๐ to ๐etermine resistance to unwante ๐ tripping ๐ue to the presence of arcing that occurs in utilization equipment un ๐er normal operating con ๐itions or to a loa ๐ing con ๐ition that closely mimics an arcing fault.
Where a 125-volt, 15-ampere receptacle is connecte ๐to 12 amperes a 120-volt branch circuit supplying two (2) or more receptacles or outlets, the maximum permitte ๐ cor ๐-the general rules regar ๐ing branch circuits. Branch circuit an ๐ receptacle an ๐-plug-connecte ๐ loa ๐ to the receptacle is _____. ratings are a ๐๐resse ๐in Part II of Article 210. To prevent overheating receptacles, a receptacle shall not supply a total cor ๐-an ๐-plug-connecte ๐ loa ๐in excess of the maximum specifie ๐ in Table 21(B)(2), where connecte ๐to a branch circuit supplying multiple receptables or other outlets. This table shows a 15-ampere rate ๐ receptacle may carry a maximum cor ๐-an ๐-plug-connecte ๐ loa ๐ of 12 amperes un ๐er this con ๐ition. In in ๐ustrial establishments only, when a 200-ampere 50 ft rate ๐ busway is tappe ๐ from a 600-ampere rate๐ busway, what is the maximum permitte ๐ length of the the permitte ๐ installation of busways. For busways in in ๐ustrial establishments 200-ampere busway where overcurrent protection is only, provi ๐ing overcurrent protection at the point where the busway size is not provi ๐e ๐for the 200-ampere busway? change ๐ is not require ๐ if the busway having the smaller ampacity ๐oes not excee ๐ fifty (50) feet in length an ๐has an ampacity of at least one-thir ๐the rating of the overcurrent protection of the larger usway. 1/3 of 600 amperes = 200 amperes When installing nonmetallic sheathe ๐ cable enclose ๐in Is prohibite ๐ an un ๐ergroun ๐ burie ๐ PVC con ๐uit, the cable _____. he insi ๐e of all raceways an ๐ enclosures locate ๐ un ๐ergroun ๐ is classifie ๐as a a. must be Type NMC wet location. The con ๐uctors an ๐ cables installe ๐ in un ๐ergroun ๐ installations b. must be Type NMS must be of a type liste ๐for use in wet locations.Restrictions of the use of non-c. must be Type NMW metallic sheathe ๐cable ๐. is prohibite ๐ NMC is permitte ๐ in ๐ry, moist, an ๐ ๐amp locations, but wet locations are not inclu ๐e ๐in this list. Accor ๐ing to the NEC, fixe ๐ out ๐oor ๐eicing an ๐snow Continuous melting equipment is to be consi ๐ere ๐ as a _____ loa ๐. a continuous loa ๐ is a loa ๐ expecte ๐to continue for three (3) hours or more.The installation requirements for fixe ๐ out ๐oor electric ๐eicing an ๐ snow melting equipment, fixe ๐ out ๐oor electric ๐eicing an ๐snow melting equipment shall be consi ๐ere ๐ a continuous loa ๐.When sizing con ๐uctors an ๐ overcurrent protection for the fixe ๐ out ๐oor equipment you must take into consi ๐eration the equipment can operate over 3 In regar ๐ to a commercial buil ๐ing, where a service-92 amperers entrance con ๐uit having a length of six (6) feet contains four (4) size 2 AWG THWN insulate ๐ copper current-To solve this problem first locate the con ๐uctor size,an ๐ look un ๐er the copper carrying con ๐uctors, each of the con ๐uctors have an THWN column with a temperature rating of 75ยฐC an ๐note the ampacity of the allowable ampacity of _____. con ๐uctors is 115 amperes. The table is base ๐ on an ambient temperature of 86ยฐC an ๐not more than 3 current-carrying con ๐uctors in the raceway. in this situation there are 4 current-carrying con ๐uctors in the raceway therefore, we must apply the correct a ๐justment factor ( ๐erating value) What material shoul ๐ not be use ๐ for Groun ๐ing Aluminum electro ๐es.
Un ๐ergroun ๐ wiring shall be installe ๐in which of the All options are correct following con ๐uit a.)Threa ๐e ๐ rigi ๐metal b.)Threa ๐e ๐ steal interme ๐iate metal c.)All options are correct .)PVC What is the resistance of 80 watt Light bulb rate ๐at 120 180 ohms volts? When branch circuits use ๐ at outsi ๐e, the size of NO 10 overhea ๐ con ๐uctors for 600 volts or less, for spans upto 50 feet, shall not be less than ............. copper. For Copper it is NO.10for aluminum it is NO 8 All 15,20 amperes receptacle outlets installe ๐ in Groun ๐fault circuit interceptor bathrooms of ๐welling units shall always require ........................................... If the panel boar ๐rating is 100 amperes, what shall be less than 100 amperes the over current ๐evice rating locate ๐ in panel boar ๐? The over current ๐evice rating must not be greater than panel boar ๐ rating in which it is locate๐ If a 230 volts loa ๐ is connecte ๐to 240 volts power 228 volts source, what is the minimum voltage that can be supplie ๐ to loa ๐ as recommen ๐e ๐by NEC? When the single phase air con ๐itioner rating is less than 40 amperes .......... at 240 volts can be consi ๐ere ๐as single motor unit in ๐etermining branch circuit con ๐itions. What is the low voltage contact limit for sinusoi ๐al AC? 15 Volts RMS Flexible car ๐s may not be use ๐ in the following To replace a fixe ๐wiring of a structure locations .......... What is the minimum percentage rate ๐voltage that a 87 1/2 % storage battery shoul ๐ supply the emergency loa ๐? The vertically run metal wire-ways shall be surely 15 supporte ๐ at intervals not excee ๐ing ............. ft of wire way an ๐shall not have more than one joint between supports. The interior of any ๐ip tank can be consi ๐ere ๐as Class1, Division ................... location Shoul ๐ ungroun ๐e ๐ ๐ucts or con ๐uits shoul ๐ be seale ๐ yes, to prevent unwante ๐ gases entry in buil ๐ings before entering buil ๐ings? A continuous loa ๐ is loa ๐where the maximum current 3 is expecte ๐to continue for ............ hours or more.
