CCT CCT Electrical Systems & Wiring

Question 1

What is the purpose of a ground fault circuit interrupter (GFCI) when wiring a Casper system in a US installation?

Accepted Answer

To protect personnel from electric shock by detecting leakage current to ground

Answer

To increase voltage to the system

Answer

To regulate system output frequency

Answer

To prevent overloading the neutral conductor

Question 2

According to NFPA 70 (National Electrical Code), what color is the grounding conductor in a standard US branch circuit?

Accepted Answer

Green or bare copper

Answer

White

Answer

Black

Answer

Red

Question 3

A Casper system's nameplate states 120 V / 10 A. What is the minimum circuit breaker rating required under NEC continuous-load rules if the equipment runs continuously?

Accepted Answer

12.5 A (125% of 10 A)

Answer

10 A

Answer

15 A based on standard breaker sizing only

Answer

20 A always

Question 4

What does the term 'voltage drop' refer to in a Casper system's supply wiring?

Accepted Answer

The reduction in voltage along a conductor due to its resistance and the current flowing through it

Answer

The sudden loss of AC frequency

Answer

The difference between AC and DC voltage

Answer

The output fluctuation caused by load shedding

Question 5

Which wiring method is commonly used to protect Casper system conductors in industrial or commercial environments requiring mechanical protection?

Accepted Answer

Electrical metallic tubing (EMT) conduit

Answer

Open wiring on insulators

Answer

Flat ribbon cable

Answer

Twisted-pair telephone wire

Question 6

Before performing any wiring work on a live Casper electrical panel, what lockout/tagout (LOTO) step must be completed first?

Accepted Answer

De-energize the circuit and apply a personal lock to the isolating device before touching any conductors

Answer

Attach the tag after completing work

Answer

Wear rubber-soled shoes only

Answer

Notify a supervisor after starting work