A push button switch is used to control electrical circuits that we only want to operate for a short time.

Switches can be 'push to make' as is the case in the horn switch. When we push the switch, the horn sounds, and as soon as we let the switch go, the horn stops sounding.

Switches can be 'push to break' as is the case in the door plunger switch. By closing the door, we push the switch which removes the earth from the courtesy lamp switch.

Push switches can also be described as normally opened, or normally closed.


Symbol for a push button switch.

Push to make switch. This switch would be described as being "normally open" (n.o.). The horn circuit uses this type of switch.

Push to break switch.

Push to break switch. This switch would be describes as being "normally closed" (n.c.). The courtesy lamp circuit uses this type of switch. The door courtesy lamp switches are an example of this type of switching.


» Course Glossary


Please note, if you want to contact the main Training Centre in Baldoyle, you need to ring 01-8167400.

If you want to contact the CP Fitters' Section, you can Contact Us by email, admin@cpfitters.info, or by telephone: 00 353 1 8167543 This number gets you through to the CP Fitters' Section, Baldoyle Satellite Unit.

Our Address is : Construction Plant Fitters' Section, Unit 116, Grange Way, Baldoyle Industrial Estate, Baldoyle, Dublin D13 CA48.
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