Unit 2 Electrical Componentscontinued EET 110 Electronics Survey
- Slides: 16
Unit 2 - Electrical Components-continued EET 110 Electronics Survey I
Topic Covered Last Week Conductors n Wire Sizes n Lamps n Switches n
Topics to cover 120 vs. 240 Voltage systems n phasing n Recptacles n
120 Volt house wiring n 2 wires – Hot-power carrying wire – Neutral-grounded wire 120 V
240 Volt House wiring n 3 wires – Two hot-power carrying – Neutral-grounded wire n Connecting 2 colored together results in 240 120 V 240 V 120 V
Outlet Receptacles Duplex outlets n 220 -240 volt outlets n
Outlets Permanently wired in structure n Provide the Female (receiving) terminal n
GFCI
Nongrounding Type Receptacle n n Older type receptacle Only to be used where there is no grounding system NEC allows GFCI in place of nongrounding 110 V current
Grounded Receptacle n n n Provides a connection for grounding conductor (green hex screw) Safely bleeds off current to prevent shock 110 V current
Split Receptacle Has a break-off fin to separate outlets n Can provide two separate circuits n One circuit with ½ switched n 110 V current n
No-shock safety duplex n n Self-closing outlets Prevents children from inserting objects Rotary cap snaps shut when plug is removed 110 V system
Weatherproof receptacles n n n Outdoor use Seals moisture out Self closing or manual close New installation must be GFCI protected 110 V system
Tandem blades, U-shaped ground n Terminal connections – Silver- ungrounded (hot)— 240 application only – Brass- ungrounded (hot) – Green- grounded n Used for – Air conditioners n 240 V system ONLY
Receptacles for three wires 2 Brass terminals n Used for n – Electric dryers – Electric ranges n 240 V system
Horizontal and vertical blades and U shaped ground n Used for – Large air conditioners – Heavy power tools – Garden equipment n 240 V system
