Assertion: relay's contact | /r/HasProperty | common
Facets:
value: usually
type: DEGREE
Source sentences:
text: A contactor joins 2 poles together, without a common circuit between them, while a relay has a common contact that connects to a neutral position.
text: The contacts are usually common (COM), normally open (NO) and normally closed (NC).
text: Another contact called common contact is present in order to connect the switching points.