What is the accuracy of 20 14 and 20 17 meters?

The mechanical ammeter used for 20 14 is no longer allowed. Because the previous mechanical electric meters were made according to the principle of electromagnetic induction, there were drivers, travel dials, transmission gears and so on in the electric meters. When the electric meter rotates, it can be used for a long time, the coil iron core is magnetized, and the gear transmission is worn, which leads to inaccurate walking and counting.

Electric meters are national compulsory measuring instruments, and civil electric meters will go through many strict testing links before they are put into use. Generally speaking, the metering accuracy of electric meters provided by power grid companies to residents meets the national standards, and the metering error is less than 2%.