If a building has no intersystem bonding termination, the bonding conductor or grounding electrode conductor must connect to any location except which of the following?

The concept of intersystem bonding termination is crucial in ensuring that different types of grounding systems and conductors are properly bonded to prevent hazardous conditions. When a building lacks an intersystem bonding termination, it is important to understand the implications of connecting bonding conductors or grounding electrode conductors to various systems.

Connecting a bonding conductor to a metal gas piping system is not allowed because gas piping systems typically require strict isolation for safety reasons. These systems can be a potential source of ignition; therefore, bonding them improperly can create a risk of electrical issues or explosions. The purpose of maintaining separate grounding systems is to avoid creating parallel paths for electricity, which could lead to the gas system carrying fault currents.

In contrast, a water supply system, a grounding rod, and a rebar connected to the foundation offer acceptable grounding options because they can be part of the bonding network. Water supply systems are generally permitted to be bonded to grounding conductors because they are already grounded through their connection to the earth. Grounding rods are effective grounding electrodes, and rebar can provide a conductive path into the ground as part of structural grounding.

This understanding of proper bonding practices is essential for electrical safety and code compliance.