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Glossary of Terms
Industrial Control Panel - An assembly of a
systematic and standard arrangement of two or more
components such as motor controllers, overload relays,
fused disconnect switches, fuses, and circuit breakers
and related control devices such as pushbutton
stations, selector switches, timers, switches, and
control relays with associated wiring, terminal blocks,
pilot lights and similar components.
Interrupting Rating - The highest current at rated
voltage that a device is intended to interrupt under
standard test conditions.
Short-Circuit Current Rating – The prospective
symmetrical fault current at a nominal voltage to which
an apparatus or system is able to be connected without
sustaining damage exceeding the defined acceptance
criteria
Control Circuit – A circuit that carries the electric
signals directing the performance of a controller, and
which does not carry the main power circuit. A control
circuit is, in most cases, limited to 15 amp.
Power Circuit – Conductors and components of
supply, branch, and feeder circuits, supplying main line
power to loads such as heaters, motors, lighting,
receptacles, power transformers, and appliances.