Understanding Footer Steel Bonding

Footer steel bonding is a practice where steel reinforcement bars in concrete footers are electrically connected to the home's electrical grounding system. This connection creates a continuous path for electrical currents to flow from the home and dissipate safely into the ground.

Electrical Inspector's Requirements

The electrical inspector's decision to no longer require footer steel bonding in your area is based on the National Electrical Code (NEC) and local amendments. The NEC, which governs electrical installations, allows the use of alternative grounding methods, such as: Two ground rods driven into the ground at least 8 feet apart Cold water piping systemReasoning for Dissimilar Metals

The concern about dissimilar metals is related to the potential for galvanic corrosion. When dissimilar metals are connected in the ground, an electrical current can flow between them, causing the more active metal to corrode. In this case, the钢筋in the footer is more active than the copper ground wire, so the steel would corrode over time.

Alternative Grounding Methods

The alternative grounding methods mentioned by the inspector provide a sufficient path for electrical currents to dissipate into the ground. Ground rods are typically made of copper-clad steel, which is less reactive than steel and less likely to corrode. Cold water piping systems are also effective grounding paths due to the presence of minerals and other conductive materials in the water.

Conclusion

Based on the NEC and the information provided by the inspector, it appears that footer steel bonding is not required in your area. The alternative grounding methods, such as ground rods and cold water piping, are considered adequate for providing a safe and effective path to ground for your home. However, it's always advisable to consult with a qualified electrician or local building inspector to confirm the specific requirements in your jurisdiction. Flag for review