Given: A one-family dwelling unit with a demand load of 200 amperes is supplied with a 120/240 volt, single-phase, electrical system from the local utility company. What is the MINIMUM size aluminum THW conductors required for use as service-entrance conductors for this residence?

The Journeyman Electrician exam covers: grounding and bonding, overcurrent protection, wiring methods and installation, boxes and fittings, services and equipment, motors, special occupancies, load calculations, lighting, appliances, box and raceway fill, hazardous locations, trade knowledge and electrical theory.