Flipping a switch and using electrical appliances is part of our everyday lives. We know that these activities are possible owing to electricity flow. However, we hardly think about how the wires or circuits work. It is not something usually given importance to. But learning about its fundamentals surely helps. It becomes useful when you want to get the wires changed or things go haywire.
Types: Based on its application and specifics, the electrical contact gets categorised as:
1.Open: These contacts are generally open. This means there is no electrical current running through them. It changes its default position, and only the contact or processes get closed. It gets commonly used in lighting occupancy sensors, equipment cooling systems, and pilot lights.
2.Closed: This is the exact opposite of open contact. Here, the electrical current keeps flowing unless it is opened. Some examples include emergency buttons, push shutoff buttons, tip/overheating switches, and shutoff bars.
The decision gets influenced by the conductivity desired. The noble metals are preferred as they resist corrosion in hot and hostile environments.