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What does NC stand for?

NC stands for Normally Closed (switch or valve)

This definition appears very frequently and is found in the following Acronym Finder categories:

  • Science, medicine, engineering, etc.

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Other Resources:
We have 130 other meanings of NC in our Acronym Attic

Samples in periodicals archive:

Both have a normally closed status contact that can be wired to a SIL-rated controller to perform an automated "proof test.
Mounted using a clip-in fixed mounting, the switch is available with either two normally open and two normally closed contacts with an optional auxiliary set of contacts, or four normally open or normally closed contacts with optional auxiliaries.
With more than 200 buildings, walks, talks and tours to choose from, Heritage Open Days offers people in the region the chance to explore some of the fascinating buildings and places that have shaped the North East - many of which are normally closed to the public or would charge for admission.
The run will involve a drive over the barrage, which is normally closed to traffic, before members finish for a static car show outside Wales Millennium Centre at 12.
Timers are available in either normally closed (NC) or normally open (NO) models.