Which driven electrode can be used in conjunction with a metal underground water pipe as the grounding electrode for your service?

The correct answer indicates that either the copper-clad ground rod or the rigid metal conduit can be used in conjunction with a metal underground water pipe as a grounding electrode for the electrical service.

This practice aligns with the National Electrical Code (NEC) requirements, which allow a ground rod to be used to complement an existing grounding system, provided it meets the proper specifications, such as length and material. A 10-foot copper-clad ground rod is an effective grounding method due to its conductivity and resistance to corrosion, making it suitable for adding to the overall grounding system.

On the other hand, using 8 feet of trade size 3/4 rigid metal conduit also serves as an acceptable grounding electrode. The conduit can act as a grounding conductor due to its metallic properties and is allowed under the NEC, provided it is bonded correctly to the system.

Both options emphasize the importance of ensuring that the grounding system is effective in reducing the risk of electrical shock and fire hazards. Therefore, the coupling of either the ground rod or the conduit with the underground water pipe creates a reliable grounding system as mandated by electrical codes.