Quiz: 2024 International Residential Code (IRC) Chapter 34 General Requirements

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1. Which of the following is NOT a characteristic of electrical services within the scope of IRC Chapters 34 through 43?

120/240-volt
Single-phase systems
0- to 400-ampere
Three-phase systems

2. An existing electrical system in a dwelling unit is altered, and a portion of the system now experiences loads exceeding those permitted by Chapters 34 through 43. What is required for this portion of the system?

No action is required if the original installation was compliant.
The entire existing system must be upgraded to current code.
Only the added or altered portion must comply with current code.
The portions of the existing system subjected to excessive loads must comply with Chapters 34 through 43.

3. What is the primary requirement for electrical installations penetrating fire-resistance-rated walls, partitions, floors, or ceilings?

They must be sealed with standard caulk.
They must be limited to non-combustible materials.
They must be protected by approved methods to maintain the fire-resistance rating.
They must be located away from structural members.

4. According to the IRC, what is the disposition for electrical materials, components, and equipment?

They must be of domestic origin.
They must be approved.
They must be installed by a licensed electrician.
They must be readily available at retail stores.

5. When are new electrical work and parts of existing systems affected by new work or alterations subject to inspection?

Only if the total project cost exceeds a specific threshold.
Only if required by local amendments.
They shall be inspected by the building official.
They are subject to voluntary inspection by the installer.

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