Quiz: 2024 International Residential Code (IRC) Chapter 43 Class 2 Remote Control Signaling And Power Limited Circuits

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1. Which of the following is NOT covered by Chapter 43 of the 2024 IRC regarding Class 2 remote-control, signaling, and power-limited circuits?

Power supplies for Class 2 circuits.
Wiring methods for Class 2 circuits.
Class 2 circuits that are an integral part of a device.
Class 2 circuits that are not an integral part of an appliance.

2. For remote-control, signaling, and power-limited conductors of classes other than Class 2, which document should be consulted?

International Residential Code (IRC) Chapter 43.
International Building Code (IBC) Section 307.
NFPA 70, Article 725.
Manufacturer's installation instructions.

3. Which of the following is NOT a permitted power source for a Class 2 circuit according to the IRC?

A listed Class 2 transformer.
A listed Class 2 power supply.
A non-listed battery source system identified as Class 2.
Listed audio/video information technology equipment limited power circuits.

4. A piece of equipment is used as a power source for a Class 2 circuit. What marking must this equipment have if it is not a listed Class 2 transformer or power supply?

Marked to identify it as general-purpose equipment.
Marked to identify it as a Class 2 power source.
Marked with its voltage and current ratings only.
Marked as suitable for Class 1 circuits.

5. Under what condition is it permissible to interconnect the output connections of two Class 2 power sources?

Always permitted if the combined current does not exceed 10 amperes.
Only if both power sources are from the same manufacturer.
Only where listed for such interconnection.
Never permitted due to safety concerns.

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