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NO stands for Normally Open and NC is Normally Closed. It references a switching application. It is the base state of the switch. So if the load is connected to the NC terminal it will usually be energized and when the switching device is activated the circuit will open and the load will be de-energized. The NO terminal would have the load de-energized until the switch was activated and then it would be energized.
On a single pole single throw there is no common terminal. On a single pole double throw it is the terminal that is common to both the top and bottom terminals. The "hot" wire is connected to the common terminal so that when the switch is in the up position that terminal becomes energized and there will be no no voltage on the bottom terminal. When the switch is in the down position the bottom terminal becomes energized and there will be no voltage on the top terminal. In relays thisis known as a C form configuration.
A voltage appears between the terminal points of the secondary winding
The normally closed contact on a relay is the one that you can see physically touching each other. Remember that all readings are taken in the de energized state, e.g. no voltage applied to the relay's coil. When a relay is energized a Normally Closed (N.C.) contact will become open and vice versa a N.O. contact will become closed.
energized chlophyll
To test for resistance in a circuit, the circuit should be de-energized.
Goldfrapp - Ooh La La
Hum?
HUM
Re-Energized was created in 1999.
After a nap he felt energized.