BASIC ELECTRICAL SYSTEM DESIGN Flashcards
ELECTRICAL MATERIALS
▪Panel Board
▪Circuit breakers
▪Wires and Cables
▪Conductor materials
▪Insulation materials
▪Conduit
▪Junction Box
▪Sockets/Outlets
▪Switch
Enclosure of protective devices such as
circuit breakers. It serves as a central point
where electricity is received from the
main electrical supply and then divided
into individual circuits for lighting, outlets,
appliances, and other electrical loads.
PANEL BOARD
is a safety device
that protects
an electric circuit from damage caused by an overcurrent or short circuit. The primary function of this device is to interrupt the current flow to shield the equipment and prevent the risk of fire. It can be operated manually and automatically trips in case of overload and short circuit condition.
CIRCUIT BREAKER
Examples of Circuit breakers
= Miniature Circuit Breaker (MCB)
(5A to 40A)
= Molded Case Circuit Breaker
(MCCB)
(50A to 2500A)
=Air Circuit Breaker
(ACB)
(500A to 3500A)
=Oil Circuit Breaker
(OCB)
(1000A and up)
=Vacuum Circuit Breaker
(VCB)
(600A and up)
=SF6 Circuit Breaker
(SF6)
(1000A and up)
WIRES AND CABLES
= Wire: conductor + insulation (small size)
= Cable: conductor + insulation + sheath (large size)
= Bare conductor: there is no insulation
cross sectional area of conductor without insulation
mm²
CORE OF CABLES
Single-core cable
2-core cable
3-core cable
4-core cable
CONDUCTOR MATERIALS
Copper wire
Aluminum Wire
INSULATION MATERIALS
- PVC insulation wires
- Cross-Linked Polyethylene (XLPE)
-widely used type of insulation material
-inexpensive
-operating temperature ranges from -55°C to +105°C
-commonly used for building wiring, power distribution, and telecommunications
PVC insulation wires
-excellent high temperature resistance
-used in medium and high-voltage power cables
Cross-Linked Polyethylene (XLPE)
COLOR CODES OF CABLE
-Phase A (RED)
-Phase B (YELLOW)
-Phase C (BLUE)
-Neutral (BLACK)
-Earth/Ground (GREEN)
A plastic or metal pipe where electrical wires are running. It protects the wires and cables from damage.
CONDUIT
Types of conduit
= Rigid PVC Conduit
=Electrical Non-metallic Tubing (ENT)
= Flexible Metal Conduit (FMC)
= Rigid Metal Conduit (RMC)
-usually used inside the wall, slabs, and floor screed
-can be bent by being heated
Rigid PVC Conduit
-a flexible corrugated plastic-type of tubing
Electrical Non-metallic Tubing (ENT)
-has a spiral construction
-applicable to areas that require close quarters and tighter bends
Flexible Metal Conduit (FMC)
-heavyweight galvanized steel that is installed using threaded fittings.
-costly because it offers additional strength and durability
Rigid Metal Conduit (RMC)
STANDARD SIZES OF CONDUITS
-1/2 inch
-3/4 inch
-1 inch
-1 ¼ inch
-2 inch
is an enclosure or container designed to house and protect electrical connections, wiring, and components.
electrical junction box
Types of junction box
= Octagonal Junction Box
= Back Box
is a device that provides a point of connection for electrical appliances and devices to access electrical power.
electrical outlet also commonly referred to as an electrical socket or receptacle,
Types of Socket/Outlets
= Parallel Outlet
= Parallel outlet with grounding
= Universal outlet
= Two-way outlet
= Two-way outlet with grounding
is a device that is used to interrupt or control the flow of electrical current in an electrical circuit. are designed to provide a means for users to control the operation of lighting, appliances, machinery, and various electrical loads.
electrical switch
