CSLB Class B General Contractor's License Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the CSLB Class B General Contractor's License Test with interactive flashcards and multiple choice questions. Each question offers hints and explanations to enhance your understanding and readiness for the exam.

Practice this question and more.

What does the black electrical wire signify?

Live wire
Neutral wire
Ground wire
Switch wire

The correct answer is: Live wire

The black electrical wire is commonly used to signify a live or hot wire in electrical systems. This wire carries the current from the power source to the electrical device being powered, making it essential for completing an electrical circuit. Identifying the black wire as the live wire is crucial for safety and proper functioning in wiring systems. In residential wiring, the black hot wire is paired with white wires that usually serve as neutral wires and green or bare wires that function as ground wires. Understanding these designations helps ensure that electrical installations are consistent with electrical codes and safety standards, enabling technicians to work effectively without the risk of electrical shock or other hazards. This knowledge is fundamental for anyone involved in electrical work or general contracting, as it addresses proper wiring practices and safety protocols.