Ammeter selector switch is basically a normal three position switch. In large Electrical distribution panels, an ammeter is used to monitor the current through each line.
An electrical system that is not intentionally connected to the ground is known as an ungrounded system. Even though the system is not connected to the ground, there exists a connection to the ground due to the presence of capacitances between the live conductors and the ground. Therefore the so-called ungrounded system is actually a … Read more