It is generally not recommended or code-compliant to ground an antenna directly to the outlet ground inside your home. The National Electrical Code (NEC) requires that antennas be grounded to the home's grounding electrode system (GES), typically the ground rod at the power meter or breaker box, not the internal outlet ground wire. While the outlet ground is connected to the home grounding system, it is not the proper path for antenna grounding because the outlet ground path inside the house is longer and may have multiple connections increasing resistance and noise, making it unsafe and ineffective for antenna lightning protection and static discharge grounding.
The proper and legal way is to run a direct grounding wire from the antenna mast and coaxial cable grounding block outside, as short and straight as possible, to the home grounding electrode system or grounding rod, following NEC section 810 and section 250 requirements. Using the home's main grounding electrode system minimizes lightning and static electricity risks effectively.
Summary:
- Outlet ground inside the home is not a code-approved antenna ground.
- Proper grounding is to the home's grounding electrode system, usually a ground rod or the power meter/breaker box grounding.
- The grounding wire should be copper, minimized in length and bends.
- Antenna and coax cable must both be grounded to this system.
This ensures safety, noise reduction, and compliance with electrical codes.