What is another reason for a slightly higher RFC test reading?

A slightly higher RFC (Residual Fault Current) test reading can indicate the presence of a spur in the electrical system. A spur is a branch of wiring that is off a main circuit, and if it is improperly connected or has higher resistance, it can create a situation where the RFC is elevated during testing. This is important because a higher RFC reading can signal issues with the electrical integrity of the spur, such as potential overloading or inadequate disconnection, which can lead to safety risks.

In a well-constructed circuit, each part of the system should maintain a balanced resistance and proper fault current levels. Therefore, if a spur is present, it could inadvertently contribute to a higher test reading because of its resistance characteristics and the way it interacts with the rest of the circuit. This emphasizes the need for thorough inspection and testing to ensure that all parts of the circuit, including spurs, are functioning correctly and safely. Understanding this allows for better assessments during electrical evaluations and highlights the significance of properly configuring electrical systems.