Standard Handbook of Plant Engineering, Third Edition
Packed with tables, formulas, charts, graphs, and checklists, this guide offers you the cutting-edge information you need to keep your plant operating at peak efficiency and profitability.
TABLE OF CONTENTS Standard Handbook of Plant Engineering, Third Edition
Chapter 5.11: Power Distribution Systems
National Electrical Contractors Association, Inc.
Washington, D.C.
GLOSSARY
Frequently used terms are defined here. More complete definitions are available in the latest edition of the National Electrical Code, published by the National Fire Protection Association. [*]
- Ampacity
- Current-carrying capacity of electric conductors, expressed in amperes.
- Ampere
- The unit of measure of electric current. Electric current is measured by the number of electrons that flow past a given point in a circuit in 1 s.
- Branch circuit
- The conductors between the final overcurrent device protecting the circuit and the outlets or utilization equipment.
- Bus(es)
- Metal conductors, usually copper or aluminum, of large size utilized to transmit large blocks of power.
- Capacitor
- A device capable of storing electric energy. It is basically constructed of two conductor materials separated by an insulator.
- Circuit breaker
- A device designed to open and close a circuit manually, and to open the circuit automatically (trip) on a predetermined overcurrent without injury to itself when properly applied within its rating.
- Connected load
- The sum of the continuous loads of the connected power-consuming apparatus.
- Controller
- A device, or group of devices, that serves to govern, in some predetermined manner, the electric power delivered to the apparatus to which it is connected.
- Current
- The movement of electrons through a conductor material.
- Demand
- The peak rate at which energy is consumed, specified usually in kilowatts.
- Electromagnet
- A magnet in which the magnetic field is produced by an electric...
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