Electrical (1.2) Flashcards
Energy flow through a _________ because of a difference in electrical change between two points in a circuit
conductor
Energy flow through a conductor because of a difference in electrical change between two points in a circuit
Where can service utilities be placed/sourced from?
Underground and overhead service depending on accessibility
Overhead placement of main power source to building pros/cons?
Pro: less expansive, easily accessible for maintenance, can carry high voltages over long runs
Cons: not ideal in urban settings
Underground placement of main power source to building pros/cons?
Pro: Best for urban areas, for high load carrying
Con: more expensive,
General - cables are run in pipe conduit or raceways for protection
Know the way electricity flows, list out the processes
https://www.studyforfe.com/blog/fundamentals-of-single-line-diagrams/
Utility Source(company) –> Meter –>Transformer (outdoor pad/ventilated interior)–> main switchgear –> main switchboard –> panelboards –> branch circuits —> outlets/appliances
What is the purpose of a switchgear
Measures, controls and distributes the power at the main electrical panel,
It includes a main disconnect of switches, fuses, and circuit breakers protecting the electric power supply to a building (BCI 11.31)
what is a service switch?
Within the switchgear - the main disconnect for entire electrical service (BCI 11.31)
What brings power from the main panel to the subpanels
Feeder cables bring power from the main distribution panel to sub panes in large buildings
What do branch circuits do?
Branch circuits distribute power from subpanels throughout the building (BCI, 11.32)
What is the purpose of a transformer
- Transformers are typically utilized by larger building
- Used to step down from a high-supply voltage to service voltage
- Placed close to and outdoor pad or in a well ventilated room with a wall adjacent to exterior wall
