Glossary Terms
Terms that are used on the Manufacturing Automation website
NC
Numerical Control is a technique of operating machine tools or similar
equipment in which motion is generated in response to numerically
ordered commands generated by CAD systems, punched tapes, or other
communication media.
NEMA-12
A standard from the National Electrical Manufacturers Association,
which defines enclosures with protection against dirt, dust, splashes
by non-corrosive liquids, and salt spray.
NEMA-4
A standard from the National Electrical Manufacturers Association,
which defines enclosures intended for indoor or outdoor use primarily
to provide a degree of protection against windblown dust and rain,
splashing water, and hose-directed water.
NEMA-7
A standard from the National Electrical Manufacturers Association,
which defines explosion-proof enclosures for use in locations
classified as Class I, Groups A, B, C or D, as specified in the
National Electrical Code.
NEMA-Size Case
An older US case standard for panel meters, which requires a panel cutout of 3.93 x 1.69 inches.
Network
1) Any system of computers and peripherals.
2) In an electrical or hydraulic circuit, any combination of circuit elements.
Node
A terminal on a data communications network.
Noise
An unwanted electrical interference on the signal wires.
