CCT Electrical Systems & Wiring Flashcards
6 cards from real CCT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CCT Electrical Systems & Wiring flashcards as text
What does continuity testing of a Casper system's wiring harness verify?
Answer: That an unbroken electrical path exists between two points in the circuit
Continuity testing with an ohmmeter confirms that a complete, unbroken electrical path exists between two points, verifying that conductors are properly connected.
A CCT technician measures 0.8 ohms resistance on a wire that should read less than 0.5 ohms. What is the most likely cause?
Answer: A loose or corroded connection increasing resistance in the circuit
Resistance above specification typically indicates a loose terminal, corroded connection, or damaged conductor that increases resistance beyond acceptable limits.
What is the function of a terminal block in a Casper system's electrical enclosure?
Answer: To provide a safe, organized connection point for multiple conductors without direct splicing
Terminal blocks provide organized, secure connection points for conductors entering or leaving an enclosure, improving safety, traceability, and ease of maintenance.
When sizing a wire for a Casper system circuit, which two factors primarily determine the required conductor gauge?
Answer: The current (ampacity) the wire must carry and the allowable voltage drop over its length
Wire sizing is governed by the ampacity required to carry the load current safely and the allowable voltage drop across the circuit's total length.
Which instrument would a CCT technician use to measure insulation resistance of a Casper system's wiring to detect degraded insulation?
Answer: Megohmmeter (Megger)
A megohmmeter applies a high DC test voltage and measures the very high resistance of insulation, detecting degradation that could lead to ground faults or shock hazards.
What is the purpose of using strain relief fittings where cables enter a Casper system's electrical enclosure?
Answer: To prevent mechanical stress on conductors and terminal connections caused by cable movement or pulling
Strain relief fittings clamp the cable jacket to the enclosure fitting, transferring any pull force to the jacket rather than the conductors or terminal connections.