Glossary

Term	Description
National Electrical Code (NEC)	A consensus standard published by the National Fire Protection Association (NFPA); commonly called "code".
NetBIOS	NetBIOS is an acronym for Network Basic Input/Output System. It provides services related to the session layer of the OSI model allowing applications on separate computers to communicate over a local area network.
Noise	The unwanted and/or unintelligible signals picked up on a cable circuit.
Normally Closed (NC)	The condition or position of contact prior to initiation or energizing, in this case, a closed condition.
Normally open (NO)	The condition or position of contact prior to initiation or energizing, in this case, an open condition.