30ma elcb circuit breaker rating

A very specific question!

The "30mA" in the context of an ELCB (Earth Leakage Circuit Breaker) refers to the maximum earth leakage current that the device is designed to detect and trip on.

The "30mA" rating means that the ELCB is designed to trip and disconnect the power supply when an earth leakage current of 30 milliamps (0.030 amps) or more is detected.

In other words, if there is an earth leakage current of 30mA or more flowing to earth, the ELCB will trip and break the circuit to prevent electrical shock or electrocution.

It's worth noting that the 30mA rating is a common standard for ELCBs in many countries, but it may vary depending on the specific application, country, or region. Some ELCBs may have a higher or lower rating, such as 10mA, 50mA, or 100mA.

In general, a 30mA ELCB is suitable for most residential and commercial applications, but it's always important to check the specific requirements and ratings for your particular installation.