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