Electrician Study Guide 2026
Everything you need to pass the Electrician 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.
📋 Electrician Exam Format at a Glance
📚 Electrician Topics to Study (21)
✍️ Sample Electrician Questions & Answers
1. What is the NEC requirement for the minimum working space depth in front of a 120/240V residential panel?
NEC 110.26(A)(1) requires a minimum working space of 3 feet (36 inches) in front of electrical equipment up to 150V to ground.
2. Per the NEC, what is the minimum headroom clearance required in front of electrical panels?
NEC 110.26 requires a minimum of 6 feet 6 inches headroom, but 6 feet is the minimum working clearance at the panel face.
3. What is the reactance of a capacitor called?
The opposition a capacitor provides to AC current is called capacitive reactance (Xc), measured in ohms.
4. Which NEC article covers swimming pools, fountains, and similar installations?
NEC Article 680 covers the special electrical requirements for swimming pools, hot tubs, spas, and fountains.
5. Which conductor insulation type is rated for use in wet locations and direct burial?
XHHW-2 insulation is rated for use in wet locations and is suitable for direct burial applications.
6. What is the nameplate 'service factor' of a motor?
The service factor is a multiplier that indicates how much above the rated load a motor can operate continuously without damage.