What is the minimum wire gauge for connections from the sensor to the ground fault relay?

The minimum wire gauge for connections from a sensor to a ground fault relay is No. 14 AWG. This gauge is sufficient to handle the current that these connections may require while also providing adequate protection from overheating and ensuring reliable operation of the electrical system. The choice of No. 14 AWG is based on the electrical properties and safety standards, which dictate that this gauge can effectively support the anticipated load without exceeding its ampacity under typical conditions.

Using a higher gauge wire, such as No. 16 AWG, might not provide adequate conductivity or current-carrying capacity for the applications expected in a ground fault relay system. This could lead to increased resistance, resulting in voltage drops that may impair the sensor's performance. Alternatively, using a heavier gauge, like No. 10 or No. 12 AWG, would exceed the requirements and may not be necessary, potentially leading to unnecessary costs and difficulty in installation due to stiffness and size. Thus, No. 14 AWG strikes a suitable balance between performance, safety, and practicality for this specific application.