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* 120 V, 15 Amp, NEMA 1-15* '''NEMA 5-15R''' is a modern 120V (125V), 15 Amp grounded receptacle.* 120 V, 20 Amp, NEMA 1-20* '''NEMA 5-20R''' is a modern 120V, 20 Amp grounded receptacle.* 220-240 V, 15 Amp, NEMA 2-15* '''NEMA 6-15R''' is a modern 220-240V (250V), 15 Amp grounded receptacle.* 220-240 V, 20 Amp, NEMA 2-20* '''NEMA 6-20R''' is a modern 220-240V (250V), 20 Amp grounded receptacle.[[Image:CommonNEMAstraightbladeoutlets.png]][[Image:CommonNEMAstraightbladeoutlets002.png]]* NEMA 1-15R is commonly referred to as just NEMA-1 by electricians.* NEMA 1 style connectors are the old style ungrounded (no earth ground) that are no longer used.* NEMA 5-15R is commonly referred to as just NEMA-5 by electricians.* NENA 5 style connectors are the modern earth grounded type used today. === range and dryer ===An electric oven/range draws more current than does an electric dryer. 50 AMP is specified for a range, while 30 AMP is specified for a dryer. Never change the receptacle type of a dryer for use with a range on the same wire and breaker. You could overload the wire and breaker, creating an electrical hazard. [[File:outlet-range.png]]*left: legacy 3 wire 50A 240V for an oven/range*right: modern 4 wire grounded 50A 240V for an oven/range[[File:outlet-dryer.png]]*left: legacy 3 wire 30A 240V for a dryer*right: modern 4 wire grounded 30A 240V for a dryerHomes built prior to the early 1960’s were most commonly wired with a two-wire system, absent of the modern third wire being an equipment ground wire. The first requirement for grounded receptacles in residential construction dates back to 1951 when the NEC (National Electrical Code) required laundry areas to have grounded receptacles. [[Image:ungroundedplug.png]] Homes built prior to the early 1960’s were most commonly wired with a two-wire system, absent of the modern third wire being an equipment ground wire. The first requirement for grounded receptacles in residential construction dates back to 1951 when the NEC (National Electrical Code) required laundry areas to have grounded receptacles. [[Image:nema1tonema5.gif]]This is an example of a NEMA-1 to NEMA-5 Plug Adapter. (NEMA 1-15P to NEMA 5-15R)=== GFCI Outlets ===[[Image:polarizedplugs2prongand3prong.png]] Ground Fault Circuit Interrupters (GFCI’s) are intended to protect the individuals using an electrical device particularly in a wet area. They are the receptacles with a black and red button, test and reset. It works by being tripped when sensing current leak/imbalance in turn shutting of the power to the electrical device. === GFCI Outlets ===[[Image:CommonNtle055.png]] [[Ground Fault Circuit Interrupter]]s (GFCI’s) are intended to protect the individuals using an electrical device particularly in a wet area. They are the receptacles with a black and red button, test and reset. It works by being tripped when sensing current leak/imbalance in turn shutting of the power to the electrical device.