NEMA: The National Electrical Manufacturers Association, a trade association in the US of electrical equipment manufacturers that develops many industry technical standards, such as the standard for electrical equipment enclosures.
Network control systems monitor and control the electricity network to keep power flowing and to preserve the balance between power generation and consumption.
NIST: The National Institute of Standards and Technology, is a non-regulatory agency of the United States Department of Commerce’s Technology Administration. The institute provides standard references and calibration services.
Non-Linearity: Deviation from linearity. [IEC 61298-2] Note 1: Linearity is defined in IEC 60050(300), definition 311-06-05. Note 2: Non-linearity does not include hysteresis.
Non-Repeatability: Deviation from repeatability. [IEC 61298-2] Note 3: Repeatability is defined in IEC 60050(300), definition 311-06-06.
Normally Closed Switch: A switch in which the contacts are normally closed. Actuation opens the contact.
Normally Open Switch: A switch in which the contacts are normally open. Actuation closes the contacts.
NPT (National Pipe Thread) seals are the most popular type of seal for pressure calibration systems in the U.S. and Canada.
NSF: A not-for-profit, non-governmental organization that develops standards and provides product certification and education in the field of public health and safety.
Null Switch: A floating contact switch with a zone of no contact. Often used to operate reversible motors.
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