Học liệu
Nắm vững mọi nội dung của kỳ thi, bằng ngôn ngữ dễ hiểu.
Planning, Plans & Estimating
Before any wire is pulled, a C-10 contractor must read electrical drawings, size the load, and estimate materials and labor accurately. This chapter covers plan reading, permits, dwelling load calculations, and the code-cycle framework that governs all electrical work in California.
Services & Distribution
The service and distribution system delivers utility power to the building and splits it into feeders and branch circuits. This chapter covers service equipment, feeders, panelboards, grounding and bonding, overcurrent protection, conductor ampacity, and transformers.
Branch Circuits & Wiring Methods
Branch circuits are the final wiring that carries power to receptacles, lighting, and equipment. This chapter covers branch-circuit rules, GFCI and AFCI protection, receptacle placement, wiring methods and raceways, box fill, derating, voltage drop, and required working space.
Equipment and Systems
This chapter covers how the Code sizes conductors and protection for specific loads and systems, from motors and HVAC to transformers, lighting, generators, solar, pools, and low-voltage work. Each equipment type has its own article with sizing multipliers and protection rules that override the general wiring chapters.
Testing and Troubleshooting
This chapter covers the instruments and methods electricians use to measure, verify, and diagnose circuits safely. It connects the math of Ohm's law and power to real field practice with meters, testers, and torque tools.
Safety
This chapter covers the worker-protection rules that govern every electrical job in California, from Cal/OSHA Title 8 electrical safety orders to NFPA 70E arc-flash practice. The goal is to send every worker home safe by controlling energy before it can cause a shock, arc, or fall.
Practice by topic
Jump straight into free practice questions for any single CSLB C-10 Electrical topic.