NJATC Journeyman Electrician License Examination Practice Test
Journeyman electrician examination covering NEC code requirements, electrical theory, wiring methods, motor controls, conduit bending, and electrical safety. Administered by National Joint Apprenticeship Training Committee. Key domains include Conductors, Cables, and Raceways, Electrical Safety, Blueprint Reading, and System Commissioning, Equipment and Device Installation and General Electrical Theory and Calculations.
Preguntas de Muestra
Prueba algunas preguntas para ver cómo es el examen completo.
A feeder supplies three motors and a small control panel. The designer sizes the feeder conductors by adding the three motor full-load currents exactly, with no additional factor. What motor-feeder rule is missing?
A living room wall is 15 feet long with no doors or fireplaces interrupting it. The apprentice places one receptacle in the center and says any lamp cord can reach. Which spacing principle applies?
A 480Y/277 V feeder supplies a rooftop HVAC distribution panel. The raceway crosses a 46 C roof area before entering the unit curb, and the conductors are THWN-2 copper. The apprentice sizes the feeder from the 75 C column and ignores the roof ambient condition because the run is outside. What should be done?
A 400 A, 120/240 V single-phase dwelling service uses parallel 3/0 copper service-entrance conductors per phase in two raceways. The estimator sizes the grounding electrode conductor from one 3/0 conductor only. Which sizing approach is correct?
A temporary holiday lighting installation on a commercial facade is planned to remain in place for 120 days. The owner says it is seasonal and therefore exempt from permanent wiring rules indefinitely. What should the electrician explain?