In existing structures, is the installation of the intersystem bonding termination required when certain grounding conductors exist?

The correct answer indicates that the intersystem bonding termination is permitted to connect at specified locations, which aligns with code requirements. This means that while the installation of an intersystem bonding termination may not be universally required across all existing structures, there are specific scenarios or locations within a structure where its installation is necessary for safety and compliance. This flexibility acknowledges the varying circumstances found in different installations and the fact that grounding systems can differ significantly based on factors like building type, age, and existing grounding conditions.

In the context of grounding practices, it is important to understand that intersystem bonding is crucial for ensuring that different grounding systems within a building are safely interconnected. This is particularly vital in mitigating potential electrical hazards, such as voltage differences between systems. Thus, while the intersystem bonding termination is crucial, its installation is not a blanket requirement for every existing structure but rather should be assessed based on the specific conditions present and local codes that apply to those conditions.

The other choices present misunderstandings of the requirement. Always requiring it overlooks the complexity and variability of different existing structures. Similarly, stating that it is never required fails to recognize situations in which it enhances safety and compliance. Lastly, limiting the requirement only to residential buildings ignores applications in commercial or industrial settings where bonding is