Electrical equipment protection system is required to maintain electrical equipment. A detection system is needed that handles specific protection and performs monitoring. One of the electrical equipment protection systems which detect leakage current. The residual current device (RCD) circuit is a circuit that detects leakage current using a coil. The output value of the RCD circuit is the induced voltage. This study describes the development of an internet of things-based leakage current monitoring system is implemented on three different electrical loads. Electrical loads using the lamps with the power of 3, 5, and 9 watts. The microcontroller is used to process the induced voltage value data and Wi-Fi module is used to connect to the Internet network and database. Then, we use a database of Blynk server as an online monitoring system. System test results show that the leakage current monitoring system to electrical load with different loads can work well with the threshold voltage as a set-point.