Residential Electrical Services Exam Questions and Answers (Graded A+)

When sizing electrical services, at what percentage is the first 3,000V A rated? - ANSWER-100% A service conductor without an overall jacket must have a clearance of not less than___________above a window that can be opened. - ANSWER-three feet NEC Section 230.6 considers conductors installed under at least___________inch(es) of concrete to be outside the building. - ANSWER-two Type NM Cable may not be used in____________. - ANSWER-Shallow chases of masonry, concrete, or adobe. Type MC cable may not be used_____________. - ANSWER-Where subject to physical damage. Type SE cable is available with___________for interior wiring systems. - ANSWER-An insulated grounded conductor. Type Ser cable may be used____________. - ANSWER-As a subfeed under certain conditions. When sizing the general lighting load for electric services, what percentage is the first 3,000VA rated at? - ANSWER-100% The minimum service disconnecting means for one-family dwelling is_____________. - ANSWER-100 A The general lighting load in a residence is 3,600VA at 120V. What is the amperage? - ANSWER-Amperage=Lighting Load/Voltage A single-pole GFCI breaker is rated at______________. - ANSWER-120 VAC In a residential electric service, the service can be grounded to the underground gas piping system. - ANSWER-False Service drop conductors must be at least____________________feet above the ground or other accessible surface at all times. - ANSWER-10 In a noncumbustible wall, the outlet box may be recessed________________. - ANSWER-1/4 inch A duplex receptacle outlet must be installed in all hallways longer than______________feet. - ANSWER-10 Electric ranges, clothes dryers, and water heaters that operate at 240V require a________________circuit breaker. - ANSWER-two pole