In the United States, what circuit does black wire insulation indicate in a three-wire 120 V AC cable?

Q: In the United States, what circuit does black wire insulation indicate in a three-wire 120 V AC cable?

The correct answer is B: Hot. The official 2026-2030 Question Pool answer is B: Hot. This Technician question is synchronized with the current NCVEC release and incorporated errata. Use the exact wording and answer key shown here when preparing for the current exam pool.

Previous Next

Deep Dive: T0A03

The official 2026-2030 Question Pool answer is B: Hot. This Technician question is synchronized with the current NCVEC release and incorporated errata. Use the exact wording and answer key shown here when preparing for the current exam pool.

Why Other Answers Are Wrong

Option A: This is not the keyed answer in the current official pool. The official keyed answer is B: Hot. Option C: This is not the keyed answer in the current official pool. The official keyed answer is B: Hot. Option D: This is not the keyed answer in the current official pool. The official keyed answer is B: Hot.

Exam Tip

For T0A03, remember the current official key: B - Hot.

Memory Aid

T0A03: B - Hot

Source & Coverage

Question Pool: 2026-2030 Question Pool

Subelement: T0A

Reference: 2026-2030 Question Pool · T0 - Safety

Key Concepts

T0A Technician question pool official answer key

Official Pool Source

Question text and answer key are synchronized with the current NCVEC Technician Class pool and mapped to the T0A topic.