Electrical Flashcards
is one in which the components are connected in tandem.
SERIES CIRCUIT
is one in which the components or loads are so arranged that the current divides between them.
PARALLEL CIRCUIT
the point of delivery of electricity to a building by a public utility company.
SERVICE ENTRANCE
The service entrance conductors in the form of bus bars terminates in the main switchboard and connects to the distribution panel boards by means of feeder circuits protected by circuit breakers.
MAIN SWITCHBOARD
is a set of conductors which extends from the main switchboard to a distributing center (panel board) with no other circuits connected to it between the source and the distributing center.
FEEDER CIRCUITS
are line extensions of a feeder, fed through a panel board or cut-out, or from one distributing center to another and having no other circuit connected to it between. the two distributing centers
SUB-FEEDER CIRCUITS
These are small capacity conductors which deliver energy to lamps, motors and other loads within the circuit.
BRANCH CIRCUITS
These serve to control and protect the sub feeders and branch circuits.
PANEL BOARDS AND SUB-PANEL BOARDS (also called CUT-OUTS)
These are the lighting, power and motor loads and wiring devices which are directly handled and utilized by users.
UTILIZATION EQUIPMENT
A horizontal single line diagram of the building’s electrical system from the incoming service to the utilization items at the end of the system where the major electrical components are shown as blocks or rectangles.
BLOCK Diagram
When electrical symbols are used in lieu of the blocks, it is called a “one line” or a “single line diagram”
SINGLE LINE DIAGRAM
Is a vertical line diagram of the major electrical components of the buildings electrical system presented showing the spatial relations between components.
RISER DIAGRAM
