What is the trip level of a class 'A' GFCI?

A class 'A' Ground Fault Circuit Interrupter (GFCI) is designed to provide protection against electrical shock by tripping when a ground fault is detected. The trip level of a class 'A' GFCI is commonly set to 6mA. This sensitivity level is effective for personal protection because it is low enough to prevent serious injury or fatality from electrical shock while still being high enough to avoid nuisance tripping in normal operating conditions.

Setting the trip level at 6mA means that if the GFCI detects a leakage current to ground that reaches this level, it will automatically interrupt the circuit, thereby reducing the risk of electric shock. This is especially important in environments where people may come into direct contact with electrical devices, as the lower trip level offers an important measure of safety.

Understanding this trip level is critical for anyone involved in power distribution and circuit safety, as it directly relates to the ability to safeguard individuals from potentially life-threatening electrical faults. Users and technicians must be aware of the sensitivity of these devices to ensure they provide the necessary protection in their applications.