"Metspitzer" wrote in message
news
On Thu, 29 Apr 2010 09:32:45 -0700 (PDT), Bob Villa
wrote:
On Apr 29, 9:07 am, Bitzer wrote:
I'm replacing a broken surface mount magnetic switch mounted on my
garage door that controls a signal light in the house that comes on when
the door is open.
Thus, I need a switch that is OPEN (meaning no current flows) when the
magnet is near the switch and CLOSED (meaning current flows) when the
magnet is removed from the switch.
So do I need a normally open switch or a normally closed one? Different
manufacturers/vendors seem to use the terms differently. Is it "normal"
when the magnet is near the switch-- or away from it?
You need a NC switch as you describe it.
Normally = Energized = most of the time.
Not in relays.
--
EA
Except fire alarm systems
Upload the wiring diagram to be sure.