*Question G0B04:
Where should the station’s lightning protection ground system be located?*  

*Correct Answer is  B: Outside the building*  

### AI Response: (may contain errors)  

To determine the best location for a station's lightning protection ground system, let's analyze the options:

### Correct Answer: B - Outside the building

**Explanation:**
- The lightning protection ground system should be located outside the building to effectively dissipate lightning strikes into the earth. This minimizes the risk of electrical surges entering the building and damaging equipment or posing safety hazards.

### Why the Other Choices are Incorrect:

- **A: As close to the station equipment as possible**
  - While proximity to equipment is important for grounding, the ground system must be outside to ensure that it can safely direct lightning strikes away from the building. An internal ground system may not effectively protect against direct strikes.

- **C: Next to the closest power pole**
  - Grounding next to a power pole does not guarantee effective lightning protection. The pole may not be properly grounded for lightning protection, and it could introduce additional risks if the pole is struck.

- **D: Parallel to the water supply line**
  - Running the ground system parallel to a water supply line is not advisable. This could create a path for electrical surges to travel into the building through the plumbing system, which can be dangerous.

### Useful Rules of Thumb:
- **Grounding System Design:**
  - A good grounding system should have a low-resistance path to earth. This can be achieved by using multiple ground rods connected with heavy gauge wire.
  
- **Separation from Other Conductors:**
  - Keep the lightning ground system separate from other grounding systems (like power or signal grounds) to avoid ground loops and ensure effective lightning protection.

In summary, the lightning protection ground system should be located outside the building to effectively manage lightning strikes and protect both the equipment and the structure.