NYC Master Electrical Exam 2024 Questions and Answers 100% Correct!

neutral point - ANSWER-The common point on a wye-connection in a polyphase system or midpoint on a single phase, 3-wire system, or midpoint of a single phase portion of a 3-phase delta system, or a midpoint of a 3-wire, direct current system In the NEC the words ___________indicate a mandatory requirement - ANSWER-Shall or shall not On a four wire Delta connected system with a midpoint of one phase winding is grounded, only the conductor or bus bar having a higher phase voltage the ground shall be durably and permanently marked by an outer finish that is _______ in color or by other effective means. Such Identification shall be placed at each point on the system where connection is made if the grounded conductor is also present. - ANSWER-Orange The required working space for access to live parts operating at 300 V to ground, where there are exposed live parts on one side and grounded parts on the other side is ____________. - ANSWER-3 feet 6 inches The dimensions of working space for access to live parts operating at 300 V, nominal to ground, where there are expose live parts on both sides of the workspace is________________. - ANSWER-4 feet 110.26 A1- Dead front assemblies working space - ANSWER-30" for non-electrical parts 36" for electrical parts The working space in front of the electrical equipment shall not be less than _______wide, or of the width of the equipment, whichever is greater. - ANSWER-30" Large equipment - ANSWER-1200 A or greater and over 6 feet wide Large equipment means of egress - ANSWER-Two means of egress 24" wide by 6.5 feet tall unless the following condutions are met 1) unobstructed egress 2) Double the workspace Headroom shall not be less than _______. - ANSWER-6.5 feet or the height of the equipment Live parts of electrical equipment operating at ______volts or more she'll be guarded against accidental contact or approved enclosures or by any of the following means - ANSWER-50 volts 4) by elevation of 8 feet or more above the floor or other working surface A fence shall not be less than ______feet in height - ANSWER-8 feet One entrance to enclosures for electrical installations as described in 110.31 not less than _______wide and _________high shall be provided to give access to the working space around the electrical equipment - ANSWER-30 inches and 6.5 feet Network compartments shall have at least ________means of access. Each door she'll have an access that leads to a legal exit. - ANSWER-Two Where rear access is required to work on deenergized parts on the back of enclosed equipment a minimum working space of __________horizontally shall be provided - ANSWER-30 inches All non-current carrying metal parts of electrical equipment and all metal raceways and cable shall be solidly grounded and bonded to all metal pipes in rails at the portal and the intervals not exceeding _____________throughout the tunnel. - ANSWER-1000 feet Manhole workspace for cabling-A clear workspace not less than _______wide shall be provided were cables are located on both sides and not less than _______were cables are only on one side. - ANSWER-3 feet 2-1/2 feet Access to manhole dimensions. Rectangular access openings shall not be less than _______. Round access openings in a manhole shall be not less than ______inches in diameter - ANSWER-26" x 22" 26" Manhole openings for personnel shall be located where they are not directly above electrical equipment or conductors in the enclosure. Where this is not practiceable either a ________or a _______shall be provided. - ANSWER-Protective barrier of fixed ladder