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May 19, 2020
What is open and closed? Before we get into what normally open and normally closed are, let's clarify what "open" and "closed" mean. As with so many topics that we try to simplify by associating with something we are familiar with, associating electrical current flow with water flow causes a tremendous amount of misunderstandings. Whereas, we open a water faucet to start water flow, we close an electrical contact to start current flow, and instead of closing a water faucet to stop water flow, we open an electrical contact to stop current flow.
IMPORTANT CONCEPT:
What is normally? This is simply the state that the contact is in when something else is not affecting it. If it is a switch, then it is off.
Normally open - Is a contact that does not flow current in its normal state. Energizing it and switching it on will close the contact, causing it to allow current flow.
Normally closed - Is a contact that flows current in its normal state. Energizing it and switching it on will open the contact, causing it to not allow current flow.
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Example: Now let's go through a real-world example of normally open and normally closed contacts that we are all familiar with. A 3 way switch is an excellent example of using normally open and normally closed Stainless Steel Push Button Switch. And maybe we'll clear up a few things for the household electrician or do it yourself. First let's break it down into the basics.
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.