Yes, you are correct. By connecting the grounding electrode conductor (GEC) to the metal gas pipe where the bonding jumper is already connected, you are effectively using the gas pipe, in part, as a grounding electrode.Here's a breakdown of why that's generally problematic and violates electrical codes: Code Violation

The National Electrical Code (NEC) specifically prohibits using metal gas piping systems as grounding electrodes (NEC 250.52(B)(1)).

Why the Prohibition? Potential for Disconnection

Gas piping systems are subject to alterations, modifications, and even complete replacement. If the gas piping is disconnected at some point, the grounding electrode system would be compromised, creating a dangerous situation.

Corrosion and Insulation

Gas piping systems often have non-conductive coatings or couplings (e.g., Teflon tape on threaded joints) that can impede reliable electrical conductivity, making it an unreliable grounding path.

Safety Concerns

Using the gas piping system as a grounding electrode can create a path for stray currents to travel through the gas lines. In the event of a fault, this could create a shock hazard or even potentially ignite gas leaks.

Correct Installation

The grounding electrode conductor should connect directly to an approved grounding electrode (ground rod, concrete-encased electrode (Ufer ground), metal underground water pipe (with specific restrictions), etc.). The gas piping system is required to be bonded to the electrical grounding system (usually at the service panel or meter). This is to ensure that the gas piping is at the same electrical potential as other grounded metal parts in the building, reducing the risk of shock. Bonding is NOT the same as grounding.

The bonding jumper to the gas pipe should be sized according to the NEC, based on the size of the service conductors.

In summary, your observation is accurate. You are, in effect, using the gas pipe as a grounding electrode by connecting the GEC to it at the bonding point. This is a code violation and should be corrected.

What to do


Disconnect the grounding electrode conductor from the gas pipe.2.

Connect the grounding electrode conductor to an appropriate, code-approved grounding electrode (e.g., ground rod, Ufer ground, water pipe, but adhere to all NEC requirements).3.

Ensure the gas piping is properly bonded to the electrical grounding system at an appropriate location (e.g., near the meter or service panel).

Important:* This is electrical work. If you are not a qualified and licensed electrician, you should hire one to correct this issue. Improper grounding and bonding can be dangerous and potentially lethal. Flag for review