1. Unit 2- Electrical Components-continued EET 110 Electronics Survey I

2. Topic Covered Last Week Conductors Conductors Wire Sizes Wire Sizes Lamps Lamps Switches Switches

3. Topics to cover 120 vs. 240 Voltage systems 120 vs. 240 Voltage systems phasing phasing Recptacles Recptacles

4. 120 Volt house wiring 2 wires 2 wires –Hot-power carrying wire –Neutral-grounded wire 120 V

5. 240 Volt House wiring 3 wires 3 wires –Two hot-power carrying –Neutral-grounded wire Connecting 2 colored together results in 240 Connecting 2 colored together results in 240 120 V 240V

6. Outlet Receptacles Duplex outlets Duplex outlets 220-240 volt outlets 220-240 volt outlets

7. Outlets Permanently wired in structure Permanently wired in structure Provide the Female (receiving) terminal Provide the Female (receiving) terminal

8. GFCI

9. Nongrounding Type Receptacle Older type receptacle Older type receptacle Only to be used where there is no grounding system Only to be used where there is no grounding system NEC allows GFCI in place of nongrounding NEC allows GFCI in place of nongrounding 110 V current 110 V current

10. Grounded Receptacle Provides a connection for grounding conductor (green hex screw) Provides a connection for grounding conductor (green hex screw) Safely bleeds off current to prevent shock Safely bleeds off current to prevent shock 110V current 110V current

11. Split Receptacle Has a break-off fin to separate outlets Has a break-off fin to separate outlets Can provide two separate circuits Can provide two separate circuits One circuit with ½ switched One circuit with ½ switched 110V current 110V current

12. No-shock safety duplex Self-closing outlets Self-closing outlets Prevents children from inserting objects Prevents children from inserting objects Rotary cap snaps shut when plug is removed Rotary cap snaps shut when plug is removed 110 V system 110 V system

13. Weatherproof receptacles Outdoor use Outdoor use Seals moisture out Seals moisture out Self closing or manual close Self closing or manual close New installation must be GFCI protected New installation must be GFCI protected 110 V system 110 V system

14. Tandem blades, U-shaped ground Terminal connections Terminal connections –Silver- ungrounded (hot)240 application only –Brass- ungrounded (hot) –Green- grounded Used for Used for –Air conditioners 240 V system ONLY 240 V system ONLY

15. Receptacles for three wires 2 Brass terminals 2 Brass terminals Used for Used for –Electric dryers –Electric ranges 240 V system 240 V system

16. Horizontal and vertical blades and U shaped ground Used for Used for –Large air conditioners –Heavy power tools –Garden equipment 240 V system 240 V system