Maryland Journeyperson Electrician Exam, Services and Service Equipment: all 49 questions

All questions from the Services and Service Equipment section for Maryland Journeyperson Electrician Exam, each with the correct answer.

2002What is the maximum number of service disconnects permitted for one service?
2004A 120/240 volt service drop passes over a roof with a slope of 4 in 12. What is the minimum clearance above the roof permitted by the exception for sloped roofs?
2005Overhead service conductors cross a public street that is subject to truck traffic. What is the minimum vertical clearance above the street?
2006Overhead service conductors run beside a window that is designed to be opened. What minimum horizontal clearance from the window is required?
2007Since the 2020 edition, what is required for all services supplying dwelling units?
2008Which statement about overhead service conductors and building openings is correct?
2012In general, how many services may supply a single building or structure?
2014What is the minimum size copper conductor permitted for an overhead service drop, other than for limited loads?
2016Where must a service head generally be located in relation to the point of attachment of the service drop?
2017What is the minimum width of the working space in front of service equipment?
2018Which of the following may not be used to support overhead conductor spans?
2019Which types of surge protective device satisfy the dwelling unit service surge protection rule?
2020Service-entrance cable run on the outside of a building must be supported within 12 in. of the service head and at intervals not exceeding what distance?
2021A commercial service supplies 120 A of continuous load and 40 A of noncontinuous load. What is the minimum ampacity of the service-entrance conductors?
2022Under the 2020 and later editions, how must two to six service disconnects for one service be arranged?
2023A service supplies a small commercial building, not a dwelling, with more than two branch circuits. What is the minimum service disconnect rating?
2024What is the minimum rating of the service disconnecting means for a one-family dwelling?
2025Using the 83 percent rule of the 2020 and 2023 NEC, what minimum aluminum XHHW conductor at 75 degrees C is needed for a 200 A, 120/240 volt one-family dwelling service?
2026What is the minimum size aluminum conductor permitted for an underground service lateral serving a general load?
2027An overhead outside branch circuit spans 60 ft between supports. What is the minimum copper conductor size?
2028What is the minimum vertical clearance for overhead service conductors above a residential driveway when the voltage does not exceed 300 volts to ground?
2029Where must the service overcurrent device be located relative to the service disconnect?
2030What is the maximum ground-fault trip setting permitted for service GFPE?
2031Under the 2020 and 2023 NEC, where must the emergency disconnect for a one-family dwelling be installed?
2032In a 120/240 volt single-phase dwelling service rated 200 A, the 2020 and 2023 NEC allow the service conductors to be sized at what percentage of the service rating?
2033What may be attached to a service mast that supports a service drop?
2034Service drop conductors at 120/240 volts pass over only the overhang of a roof to terminate at a through-the-roof service mast. What is the minimum clearance above the overhang?
2036What must be done with a service GFPE system when it is first installed?
2037What is the minimum height of working space for service equipment rated 1000 volts or less?
2039Service conductors installed under a building are considered outside the building when they are covered by at least how much concrete?
2040How must each service disconnect be identified?
2041A detached building is supplied by one feeder. Where must its building disconnecting means be located?
2042Where may the service disconnecting means for a commercial building be installed?
2044A 480Y/277 volt switchboard faces a concrete wall (Condition 2). What is the minimum depth of the working space?
2045Overhead service conductors operating at more than 300 volts to ground pass over a residential driveway. What is the minimum vertical clearance?
2046Which edition of the NEC first required an outdoor emergency disconnect for one- and two-family dwelling services?
2047Which of the following is permitted to be connected on the supply side of the service disconnecting means?
2048Which situation permits an additional service to a building?
2049Using the 83 percent rule of the 2020 and 2023 NEC, what minimum copper THWN conductor at 75 degrees C is needed for a 200 A, 120/240 volt one-family dwelling service?
2050A service drop cable with a bare messenger operates at 120/240 volts. What is the minimum clearance above a sidewalk accessible only to pedestrians?
2051At a supply voltage of 1000 volts or less, additional services are permitted for capacity reasons when the load exceeds what value?
2052A service disconnect supplies only two 2-wire branch circuits. What is its minimum rating?
2053What is the minimum depth of working space in front of a 120/240 volt panelboard with live parts on one side and no grounded parts on the other (Condition 1)?
2056How is the overcurrent protection for each ungrounded service conductor generally sized?
2057What is the maximum number of disconnects permitted for a building supplied by one outside feeder?
2058What is the minimum height above finished grade for the point of attachment of a service drop to a building?
2059Ground-fault protection of equipment is required for a service disconnect rated 1200 A on which system?
2061Overhead feeder conductors run from a house to a detached garage at 120/240 volts. What is the minimum clearance above the residential driveway?
2062May branch circuit conductors be installed in the same raceway as service-entrance conductors?

Maryland Journeyperson Electrician Exam, Services and Service Equipment: all 49 questions

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