Basic Electrical Theory
What is Current? What are THREE electrical formulas that use "I" in them in any place?
The movement, or flow, of electrons in a circuit.
What is a Grounding Conductor?
A system or circuit conductor that is intentionally grounded.
What is a Branch Circuit?
The portion of a wiring system extending beyond the final overcurrent device protecting a circuit.
The overhead conductors through which electrical service is supplied.
What is Backfeed?
This happens when electrical power flows backward in a distribution system.
What is Voltage Drop? Which type of circuit has Voltage Drop in it?
The change in voltage across a component that is caused by the current flowing through it and the amount of resistance opposing it.
Series Circuits.
What is a Bonding Jumper? What is an example of a Binding Jumper?
A bare or green insulated conductor used to ensure electrical conductivity between metal parts connected electrically.
Answer approved by Mr. R.
What is Kirchhoff's Current Law? Which type of circuit does this apply to?
The statement that the total amount of current flowing through a parallel circuit is equal to the sum of the amounts of current flowing through each current path.
What is a Service Entrance? What is an example of a Service Entrance?
The point where power is supplied to a building.
Answer approved by Mr. R.
What is an Insulator? What are THREE types of Insulators?
A material through which it is difficult to conduct an electrical current.
What is a Series Circuit? Draw a small example on the board.
A circuit with only one path for current flow.
What is a Grounding Electrode Conductor?
A conductor that connects either the system grounded conductor or the equipment to a grounding electrode or a point on the grounding electrode system.
What is Kirchhoff's Voltage Law? Which type of circuit does this apply to?
The statement that the sum of all voltage drops in a circuit is equal to the source voltage of the circuit.
Series Circuit
What is an Elevation View?
An architectural drawing showing height and width, but not depth.
What is a Pull Box? What is the function of a Pull Box?
A box-like enclosure made of sheet metal.
It is used in conduit runs to make it easier to pull cables from point to point in long runs.
What is a Switch Leg? Which wires do you use to wire a Switch Leg?
A circuit routed to a switch box for controlling electric lights.
White = Feed from junction box
Black = To light
What is an Equipment Grounding Conductor? What are TWO examples of an Equipment Grounding Conductor?
A conductive path part of an effective ground fault current path that connects normally noncurrent-carrying metal parts of equipment together to the system ground conductor, the grounding electrode conductor, or both.
Wire, busbar, raceway, FMT, or an extension cord.
What is Continuity?
A complete circuit that can conduct current.
What is an Electrical Box? What is one use of an Electrical Box?
Metallic or nonmetallic boxes installed in an electrical wiring system to safely house electrical components.
Outlet boxes, junction boxes, device boxes, splice boxes, and pull boxes.
What is Fish Tape and it's use?
A hand device used to pull a wire through a conduit run.
What is a Watt? What are the THREE different formulas to find wattage in the circle thingy?
The basic unit of measurement for electrical power.
P=E x I
P=(I^2) x R
P=(E^2)/R
What is a Bonding Bushing?
A special conduit bushing equipped with a conductor terminal to accept a bonding jumper.
What is a Coulomb (C)? What is it's formula?
A unit of electrical charge equal to 6.24x10^18 electrons. A coulomb is the common unit of quantity used for specifying the size of a given charge.
What is a Parallel Circuit? Draw a small example on the board.
A circuit in which each load is connected directly to the voltage source; there for, the voltage drop through each of the loads is the same, and the current is divided by the loads.
What is an Offset? What is another way to call it?