Washington Administrative Code(WAC) and Revised Code of Washington (RCW) Electrical Practice Exam

What is the general consequence of exceeding the maximum ground resistance?

1. Reduced electrical flow

2. Hazardous electrical surges

3. Increased chances of electrical shock

4. Lower energy efficiency

The correct answer is: Increased chances of electrical shock

Exceeding the maximum ground resistance can lead to increased chances of electrical shock, which is why that choice is the correct answer. Grounding systems are designed to provide a safe path for electrical faults and excess voltage to dissipate into the earth. When the ground resistance is too high, it impairs the effectiveness of this grounding system. This means that in the event of a fault, such as a short circuit, the electrical energy may not safely dissipate. As a result, dangerous voltages could remain present at equipment or exposed conductive parts, significantly raising the risk of electric shock to individuals who come into contact with those surfaces. Understanding this aspect of grounding is critical for electrical safety and system reliability. A ground resistance that remains within specified limits ensures that the grounding system will perform as intended during fault conditions, reducing the potential for electric shock incidents. The other options reflect different issues that might arise in electrical systems but do not directly correlate to the consequences of exceeding maximum ground resistance in the same manner. For example, while reduced electrical flow or lower energy efficiency can manifest from various system issues, they do not capture the immediate risks associated with ground resistance. Hazardous electrical surges could occur for different reasons, often related to lightning or other transient issues, rather