Journeyman Test Exam With Complete Solutions

Journeyman Test Exam With Complete Solutions Feeders containing a common neutral are permitted to supply how many sets of 5-wire feeders? - answer2 To measure the area of a dwelling to determine the lighting load, the fallowing dimensions are use: - answerthe floor area computed from the outside dimensions The general lighting load for residential services is calculated at? - answer3 watts per square foot What is the minimum load per each linear foot that must be allowed for show-window lighting? - answer200 volt-amperes Residential small appliances circuits are calculated at? - answer1500 watts each The branch-circuit load for a single 12-kilowatt (12 kW) electric range in a dwelling is? - answerAnswer: 8 kW Reference: 2011 NEC 220.55 Table If four 12 kW electric ranges are used in a four-unit apartment complex , what is the total kW rating that must be used for all of these ranges in calculating the electric service? - answerAnswer: 17 kW Reference: 2011 NEC 220.55 Table What is the minimum height of a set horizontal current carrying conductors not attached to a building? - answer10ft. Reference: 2011 NEC 225.18(1) Service conductors run above the top level of a window shall be permitted to be less than the ____ requirement. - answerAnswer: 3-foot Reference: 2011 NEC 225.19(D) (1) Where outdoor pendant-type lamp holders have terminals that puncture conductor insulation to make contact with the conductor, what type of wire must the conductor be? - answerAnswer: stranded Reference: 2011 NEC 225.24 When the voltage exceeds 600 volts, what is the minimum copper wire size allowed for outside overhead wiring? - answerAnswer: No. 6 AWG Reference: 2011 NEC 225.6(A) (2) What is the minimum clearance of a conductor over a roadway that is 5 kW? - answerAnswer: 18.5' ft. Reference: 2011 NEC 225.60 What is the minimum horizontal clearance of 5 kW conductors from a building? - answerAnswer: 7.5' ft. Reference: 2011 NEC 225.61 Five feet of an overhead 240V service drop passes over a 4: 12 slope. The minimum clearance for the service drop is? - answerAnswer: 3 feet Reference: 2011 NEC 230.24(A) Exception 2 Service drop conductors , when not in excess of 150 volts to ground, that pass over residential sidewalks ,finished grade (the ground), or over any platform or any projection from which the conductors may be reached , must have a minimum clearance of - answerAnswer: 10 ft. Reference: 2011 NEC 230.24(B) (1) Service-drop conductors, when not in excess of 300 volts, that pass over residential driveways and commercial areas such as parking lots and drive-in establishments not subject to truck traffic must have a clearance of at least? - answerAnswer: 12 ft. Reference: 2011 NEC 230.24(B) (2) Multicolored cables used for service drops must be attached to buildings or other structures by: - answerAnswer: fittings approved for the purpose Reference: 2011 NEC 230.27 What is the smallest copper wire size allowed for service-entrance conductors? - answerAnswer: No. 8 AWG Reference: 2011 NEC 230.31(B) What is the smallest aluminum or copper-clad wire size allowed for service-entrance conductors? - answerAnswer: No. 6 AWG Reference: 2011 NEC 230.31(B) The minimum allowable current rating of 3-wire service-entrance conductors for a one-family dwelling is? - answerAnswer: 100 amperes Reference: 2011 NEC 230.42 Service-entrance cable must also be supported at intervals of? - answerAnswer: 2 ½' Reference: 2011 NEC 230.51(A) The allowable number of service disconnects can consist of up to? - answerAnswer: six Reference: 2011 NEC 230.71(A) A means must be provided to disconnect the grounded conductor from the premises wiring. One approved method is? - answerAnswer: a terminal with pressure connectors Reference: 2011 NEC 230.75 The service disconnecting means for a two-circuit installation shall not be less than? - answerAnswer: 30 amperes Reference: 2011 NEC 230.79(B) The minimum allowable current rating of 3-wire service-entrance conductors for a one-family dwelling with an initial net computed load of 10 kVA or more is? - answer: 100 amperes Reference: 2011 NEC 230.79(C) Service conductors shall not be connected to the service disconnecting means with. - answerAnswer: solder only Reference: 2011 NEC 230.81 Where must an overcurrent device be located in a circuit? - answer: at the point where the conductor receives its supply Reference: 2011 NEC 240.21 A 600 amp feeder in a wire way has a 200 amp tap. What is the maximum distance that the tap may be? - answer25 ft. Reference: 2011 NEC 240.21 (B) (2) A feeder tap less than 25 feet long does not require overcurrent protection at the tap if the ampacity of the tap conductors is at least? - answer33 1/3% of the feeder conductor Reference: 2011 NEC 240.21(B) (2) Branch-circuit overcurrent devices are not permitted in which of the following areas? - answerin residential or motel bathrooms