Updated: Dec 9, 2025 | Source: 2023-2027 Question Pool | Topic: G0B
G0B13G0B

Where should lightning arrestors be located?

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Deep Dive: G0B13

The correct answer is A: Where the feed lines enter the building. Where lightning arrestors should be located is where the feed lines enter the building. Lightning arrestors must be at the entry point to protect equipment inside. For amateur radio operators, this is critical lightning protection. Understanding this helps ensure proper lightning protection.

Why Other Answers Are Wrong

Option B: Incorrect. Lightning arrestors shouldn't be on antenna opposite feed point - they should be at building entry, not on antenna. Antenna location is wrong. Option C: Incorrect. Lightning arrestors shouldn't be in series with each ground lead - they should be at feed line entry, not in series. Series connection is wrong. Option D: Incorrect. Lightning arrestors shouldn't be at closest power pole - they should be at building entry, not power pole. Power pole is wrong.

Exam Tip

Lightning arrestors location = where feed lines enter building. Think 'L'ightning 'A'rrestors = 'L'ocated 'A't entry. Lightning arrestors must be at entry point to protect equipment inside. Not on antenna, not in series, not at power pole - just at building entry.

Memory Aid

Lightning arrestors location = where feed lines enter building. Think 'L'ightning 'A'rrestors = 'L'ocated 'A't entry. Lightning arrestors must be at entry point to protect equipment inside. Critical lightning protection location.

Real-World Example

Lightning arrestors: They should be located where feed lines (coax, etc.) enter the building. This protects equipment inside the building - lightning energy is diverted to ground at the entry point. If arrestors are elsewhere, equipment inside isn't protected. Building entry is the location - this is where lightning arrestors should be installed.

Source & Coverage

Question Pool: 2023-2027 Question Pool

Subelement: G0B

Reference: 2023-2027 Question Pool · G0 - Electrical and RF Safety

Key Concepts

Lightning arrestors Feed lines enter building Entry point Lightning protection

Verified Content

Question from the official FCC General Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the G0B topic.