Normally Open Vs Normally Closed Switch. For example if we tell the panel to treat a zone as normally closed we re telling the panel that when it sees a short on the zone it is in the normal non faulted condition and when it sees an open on the zone it should show that zone faulted. In both cases a glass reed is sealed inside the float switch s stem with magnets mounted in an external float.
We can tell this switch is a normally open no switch because it is drawn in an open position. Normally open held closed something has to continuously push the switch to keep the contacts closed. Normally open switch contacts are sometimes referred to in the electrical industry as form a contacts.
We can tell this switch is a normally open no switch because it is drawn in an open position.
For example if we tell the panel to treat a zone as normally closed we re telling the panel that when it sees a short on the zone it is in the normal non faulted condition and when it sees an open on the zone it should show that zone faulted. Beware that wiring your switch incorrectly will in fact give you the opposite effect that killswitches are known for. When it comes to vertical float switches units are commonly referred to as normally open or normally closed meaning that specific liquid levels close or sever the electrical circuit. Lets take a look at each type to get a better perspective.
