unit 3- schematic symbols eet 110 electronics survey i
TRANSCRIPT
Unit 3- Schematic Unit 3- Schematic SymbolsSymbols
EET 110 Electronics Survey IEET 110 Electronics Survey I
Topics to CoverTopics to Cover
Types of representationsTypes of representations Symbols for blueprint drawingSymbols for blueprint drawing Symbols for electrical schematicsSymbols for electrical schematics
RepresentationsRepresentations
PrintsPrints Clearly showClearly show
– Types of electric devices and Types of electric devices and conductorsconductors
– Where they are locatedWhere they are located– How they are connected to each How they are connected to each
otherother Supplied by builder, archetect, Supplied by builder, archetect,
owner or electricianowner or electrician
RepresentationsRepresentations-Prints-Prints
S
Representations Representations (cont.)(cont.) SchematicsSchematics
– Clearly showClearly show Types of devices and conductorsTypes of devices and conductors Where they should be locatedWhere they should be located Electrical ConnectionsElectrical Connections
– Typically for controls or equipmentTypically for controls or equipment– Provided by engineer, manufacturerProvided by engineer, manufacturer
RepresentationsRepresentations-Schematics-Schematics
Source
Representations Representations (cont.)(cont.) PictorialsPictorials
– Clearly showClearly show Types of devices and conductorsTypes of devices and conductors Where they should be locatedWhere they should be located How they are connected togetherHow they are connected together Electrical connectionsElectrical connections Detail inside each boxDetail inside each box
– Not used in industry due to Not used in industry due to complexitycomplexity
RepresentationsRepresentations-Pictorial-Pictorial
Junction BoxJunction Box
Commonly Called a J-BoxCommonly Called a J-Box Used for:Used for:
– Code requires all splices in a boxCode requires all splices in a box– Saves laborSaves labor– Saves timeSaves time– Saves costSaves cost
Junction BoxJunction Box
PrintPrint SchematicSchematic PictorialPictorial
J
Lamp HolderLamp Holder
PrintPrint SchematicSchematic PictorialPictorial
L
Pull SwitchPull Switch
PrintPrint SchematicSchematic PictorialPictorial
S
Duplex Convenience Duplex Convenience Receptacle.Receptacle.
PrintPrint SchematicSchematic PictorialPictorial
Split Duplex Split Duplex Convenience Convenience Receptacle.Receptacle.
PrintPrint SchematicSchematic PictorialPictorial
S
Convenience Convenience Receptacle other than Receptacle other than DuplexDuplex
PrintPrint SchematicSchematic PictorialPictorial
3
Number indicates the number of receptacles (1, 3, etc.)
3
Weatherproof Weatherproof ReceptacleReceptacle
WP WP
PrintPrint SchematicSchematic PictorialPictorial
240 V Receptacle240 V Receptacle
PrintPrint SchematicSchematic PictorialPictorial
Range ReceptacleRange Receptacle
PrintPrint SchematicSchematic PictorialPictorial
R R
Drier ReceptacleDrier Receptacle
PrintPrint SchematicSchematic PictorialPictorial
D D
Ground Fault Circuit Ground Fault Circuit InterrupterInterrupter GFCIs open if current leakage to GFCIs open if current leakage to
ground exceeds .006 Aground exceeds .006 A Normally the current going to the Normally the current going to the
appliance (hot) and the current appliance (hot) and the current returning to the source (neutral) returning to the source (neutral) are equalare equal
Any fault grater than .006A opens Any fault grater than .006A opens and deenergizes the circuit.and deenergizes the circuit.
GFCIGFCI
PrintPrint SchematicSchematic PictorialPictorial
GFCI GFCI
Floor ReceptacleFloor Receptacle
PrintPrint SchematicSchematic PictorialPictorial
Push Button SwitchesPush Button Switches
Normally Open
Normally Closed
PrintPrint SchematicSchematic PictorialPictorial
S
SPST– 2 waySPST– 2 way
PrintPrint SchematicSchematic PictorialPictorial
S
SPDT– 3 waySPDT– 3 way
PrintPrint SchematicSchematic PictorialPictorial
S3
DPDT– 4 wayDPDT– 4 way
PrintPrint SchematicSchematic PictorialPictorial
S4
BuzzerBuzzer
PrintPrint SchematicSchematic PictorialPictorial
Outside telephoneOutside telephone
PrintPrint SchematicSchematic PictorialPictorial
Interconnecting Interconnecting TelephoneTelephone
PrintPrint SchematicSchematic PictorialPictorial
Battery-- SourceBattery-- Source
PrintPrint SchematicSchematic PictorialPictorial