PC Study Guide 2026
Everything you need to pass the PC exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 PC Exam Format at a Glance
📚 PC Topics to Study (69)
✍️ Sample PC Questions & Answers
1. In a 3-phase, 4-wire wye system with a measured line voltage of 208V, what is the phase voltage?
In a 208V 3-phase wye system, phase voltage equals line voltage divided by √3 (208 ÷ 1.732 ≈ 120V).
2. A 240V single-phase circuit draws 15A. What is the apparent power in VA?
Apparent power S = V × I = 240V × 15A = 3,600 VA.
3. When is an electrical permit generally NOT required?
Most jurisdictions exempt minor repairs and replacements—such as swapping a fixture in the same location—from permit requirements, though rules vary by jurisdiction.
4. NEC Article 553 covers floating buildings. What is the minimum size service conductor permitted for a floating building service?
NEC 553.5 requires floating building services to be sized per the load calculation; no separate minimum conductor size beyond standard load-based sizing applies.
5. An electrical subcontractor's scope of work is described in both the subcontract agreement and in a separately attached exhibit. If the two documents conflict, which generally controls?
When the main contract body and an exhibit conflict, the main contract body typically controls unless the contract expressly states that the exhibit takes precedence.
6. Under the Davis-Bacon Act, electrical contractors working on federally funded construction projects must:
The Davis-Bacon Act requires contractors on federally funded or assisted construction to pay workers no less than the locally prevailing wages and fringe benefits.