Your L14-30 receptacle has four positions on it. It is rated as a 125/250 volt device. It is classed as three pole four wire grounding. Connect the ground wire to the "G" screw, white wire to the "W" screw. One of your hot wires (might be red) to the "X" screw and the other hot wire (might be black) to the "Y" screw. This connection gives you the potential of 240 volts between "X" and "Y" and 120 volt potential between "W" and "X" and 120 volt potential between "W" and "Y".
In wiring an L14-30 receptacle, the hooked prong is grounded (green or uninsulated grounding wire), the terminal opposite that one is "neutral" (white) and the other two are 240-v phase "hots".
You are responsible for verifying that this works for your particular appliance.
Note: in the 50R and 60R, the hooked connector is neutral and the center pin is grounded.
NEC Manual: Exhibit 406.3, ref ANSI C73, NEMA WD 6-1997.
Answer for USA, Canada and countries running a 60 Hz supply service.
0. Always shut off the circuit breaker and test the voltage of all wires with a voltmeter prior to beginning work.
1. attach the bare copper ground wire to the green screw, winding it clockwise.
2. Strip the black and white wire to the length shown on the "strip gauge" shown on the back of the outlet.
3. Insert the white wire into one of the holes marked "white or neutral" on the back of the outlet. This will be on the same side as the silver-colored screws.
4. Insert the black wire into one of the holes marked "hot wire". This will be on the same side as the brass-colored screws.
5. When folding all the wires back into the box, be sure that the bare "ground" wire is pushed in first, and that none of the wires stick out and contact the sides of the outlet.
6. Turn on the circuit breaker, and test your outlet with a voltmeter.
Note: the "black" wire will sometimes be red, or in some cases will be white with black paint on the end.
Note also: It is possible that there are other outlets on the same circuit that are wired through this outlet. In this case, there will be two each of white and black wires. In this case, connect both white wires and both black wires in the correct positions. (There should be two back-wire holes on each side of the back of the outlet).
As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
Before you do any work yourself,
on electrical circuits, equipment or appliances
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
Wiring a duplex receptacle
Looking at the duplex receptacle from the front side directly on, you should see a larger blade hole (silver) on the left, smaller (brass) blade hole on the right and a U shaped ground blade on the bottom. The white wire connects under the left (silver) coloured screw, the black wire connects under the right (brass) coloured screw and the green wire under the green ground screw. Wiring a group of receptacles together requires them to be paralleled together. White to whites, black to blacks and ground wire to ground wires.
You will need 12-3 awg wire. The wire colors will be white, black and red. simply put, red on left, black on right and white on the center terminal. Hope this helps.
Mike
Ground connects to the green ground screw. White connects to the silver screw and black connects to the gold screw.
The receptacles will be wired in parallel with each other.
There are many three prong outlets. Need the amperage of the outlet to give the exact terminal letters.
Use the 4 wire if possible. You would only use a 3 wire for an old appliance.You shouldn't if possible. The 3 wire has no neutral wire as the 4 wire does. Som applications require the use of a 3 wire and some don't.
Yes, this is a safe connection. A range is usually wire rated at 40 amps and the manufactures do not make a 40 amp rated receptacle. The code requires the next highest rated receptacle be used which is a 50 amp rating. This is why the range receptacle is rated at 50 amps. This receptacle is known as a 3 pole 4 wire grounding receptacle, 14-50R 125/250 volt. Black wire to terminal X, red wire to terminal Y, white wire to terminal W and ground wire to terminal G.
The 240 volt receptacle has to have an amperage rating. It is this rating that governs the wire size and breaker size to feed the circuit. The new two pole breaker will be inserted in the 100 amp distribution if space is available and connected to the new wiring that terminates at the new receptacle.
The types of wire you can use on duplex receptacle with pressure terminal are labeled on the receptacle, next to the holes. AWG 14 and AWG 12 are the typical wire gauges used in this application.
If you are refering to a wall receptacle, the one on the right is the hot side. The left side is the neutral and it's slot is larger that the hot one. The U shaped on the bottom is for the ground pin of the plug.
The 50 amp receptical will not be a three prong receptacle it will be a 3-pole 4-wire grounding receptacle. It will be a 125/250 volt rating NEMA number 14–50R. The red and black wires connect to the X and Y terminals, the white wire to the W terminal and the ground wire to the G terminal.
An old 2 hole receptacle can be changed to a 3 hole receptacle that will accept a 3 prong plug, provided a ground wire is available at the box and connected to the ground (green) lug on the new receptacle. A 2 hole receptacle has a hot and neutral wire, while a 3 hole receptacle will require a ground wire connection -- in addition to the hot and neutral wires.
Buy a new receptacle that your plug fits in. You probably need one with a neutral so look for 125/240v.
Use the 4 wire if possible. You would only use a 3 wire for an old appliance.You shouldn't if possible. The 3 wire has no neutral wire as the 4 wire does. Som applications require the use of a 3 wire and some don't.
Yes, this is a safe connection. A range is usually wire rated at 40 amps and the manufactures do not make a 40 amp rated receptacle. The code requires the next highest rated receptacle be used which is a 50 amp rating. This is why the range receptacle is rated at 50 amps. This receptacle is known as a 3 pole 4 wire grounding receptacle, 14-50R 125/250 volt. Black wire to terminal X, red wire to terminal Y, white wire to terminal W and ground wire to terminal G.
The receptacle that you are looking at might be a 240 volt receptacle and that is the reason, there is no neutral needed. You should be able to tell by the configuration of the blade pattern if it is rated for 240 volt operation.
Look in the back of the range receptacle box that is in the wall. The three wires coming in should have a bare ground wire in the cable set. It wasn't brought to the receptacle because there was no place for it on the three wire receptacle If you find it back there under a screw terminal just add another short piece of wire under the screw and then connect the other end of the short wire to the new ground terminal on the new four position receptacle The wire should be equal in size to the size of the wire that exists around the ground terminal now. If the house is so old that the range cable did not have a ground wire in it the code allows a separate green ground #10 wire to be taken from the breaker panel box to the existing range receptacle This wire is to be bonded on each end. At the panel end to the ground buss and at the receptacle end around the ground screw at the back of the box unbroken and then to the new four position receptacle ground lug.
My question is WHY did you replace a four prong dryer plug with a three prong! 220 volt Electric dryers require two hot legs, a neutral and a system ground wire. Sounds as though you shunted one of the hots or the neutral. You need to install a four prong plug of the same configuration and wire it exactly as the original.
No, the wide prong is neutral it is the white wire. The narrow prong is hot it is the black wire. The round prong (in a 3 wire plug) is safety ground it is the green wire.
The 240 volt receptacle has to have an amperage rating. It is this rating that governs the wire size and breaker size to feed the circuit. The new two pole breaker will be inserted in the 100 amp distribution if space is available and connected to the new wiring that terminates at the new receptacle.
On the three prong 240 v receptacle there shouldn't be a neutral because it's not needed. Should be two hots and the ground and tuck neutrals in box.
If you are in north America, black and red go to the main prongs and white to the ground (round prong) . Black and red can be on either main prong.