Electrical Components and Equipment
What is a Switch?
A mechanical device used for turning an electrical load on and off.
What is an Ohm? What is it's symbol?
The basic unit of measurement for resistance and is represented by the Omega symbol.
What does it mean when Mr. R says that Felipe's wall as Approved?
It meets the requirements of an appropriate regulatory agency.
What is a Feeder?
Any circuit between the service equipment, the source of a separately derived system, or other power supply and the final branch circuit overload device.
What is a Schematic Diagram?
A detailed diagram showing complicated circuits, such as control circuits. It has no scale but shows the components and their electrical connections.
What is a Circuit?
A complete path for current flow.
What is an Ampere? What is one of the formulas to find Amperage?
The basic unit of measurement for electrical current.
I=E/R, I=P/E, I=sqrt of P/R
What is an Arc Flash? What is one way this might occur?
The light and heat produced from an electric arc that has enough electrical energy to cause substantial damage, fire, and even injury.
Power line disconnect, breaker mishap, whatever Mr. R accepts as an appropriate answer if not already listed.
What is Conduit? What are THREE types of conduit?
A round raceway, similar to pipe, that houses conductors.
EMT, FMC, IMC, RMC, LFMC, PVC, and ENT.
What is a One-Line Diagram?
A drawing that shows by means of lines and symbols, the path of an electrical circuit or system of circuits along with the various circuit components.
What is a Battery?
A direct current (DC) voltage source consisting of two or more cells that convert chemical energy into electrical energy.
What is Ohm's Law?
A rule stating that the current in a circuit is directly proportional to the voltage and inversely proportional to the resistance.
What is a Ground Fault Circuit Interrupter (GFCI)? What do they protect?
A device that protects people and equipment by de-energizing a circuit within an established period of time when a ground fault current exceeds the values established for a Class A device.
Other receptacle downstream the GFCI if wired correctly.
What are Raceways?
Enclosed channels designed expressly for holding wires, cables, or busbars, with additional functions as permitted in the NEC.
What is an Electrical Drawing? What is one thing it consists of?
A means of conveying a large amount of exact, detailed information in an abbreviated form that electricians understand.
It consists of blocks, lines, symbols, dimensions, and notations.
What is a Conductor?
A material through which it is to maintain an electric current.
What is Resistance? What is it measured in?
An electrical property that opposes the flow of current through a circuit and is measured in Ohms.
What is an Electrical Service?
The conductors and equipment connecting the service utility to the wiring system of the premises served.
What is Romex?
General Cable's trade name for Type NM cable; however, it is often used generically to refer to any nonmetallic-sheathed cable.
What is a Power Riser Diagram?
A single-line block diagram used to indicate the arrangement of electric service equipment, service conductors and feeders, and subpanels.
What is a Connector?
Devices used to physically connect conduit or cable to an outlet box, cabinet, or other enclosure.
What is Voltage? What is one way it is referred as?
The driving force that makes current flow in a circuit and it's also referred to as electrical pressure, electromotive force, or potential difference.
Who are the National Fire Protection Association (NEMA)?
The association that maintains and improves the quality and reliability of electrical products.
What is an MC Cable? What does it stand for?
A factory assembly of one or more insulated circuit conductors with or without optical fiber members enclosed in an armor of interlocking metal tape or a smooth or corrugated metallic sheath.
Metal-Clad Cable
What is an As-Built Drawings?
A marked-up set of drawings, also called red lines, made at the completion of the project, showing that all changes made during the construction project.