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How to twist electric wire togetherApplies to residential applications where twist-on wire connector is used |
| Use only 600 volt wire. Lamp cord, extension cords are not rated 600 volt. Use copper wire only. Aluminum wire is fire risk and should be avoided or installed by professional. 30 amp breaker use 10 gauge /  Buy: 10-2 gauge/ 30 amp 10-3/ 30 amp Southwire electric tools |
Yellow
12 gauge 20 amp Yellow/ #12 gauge wire for 20 amp with ground Buy: 12-2 gauge/ 20 amp 12-3/ 20 amp NMB is house wiring UF is underground Rolls of stranded wire |
White
14 gauge 15 amp White/ #14 gauge wire for 15 amp with ground Buy: 14-2 gauge/ 15 amp 14-3/ 15 amp NMB is house wiring UF is underground |
 Buy: Armored cable |
 Southwire armored cable cutter Buy: Rolls of stranded wire |
Stranded wire  Buy: Rolls of stranded wire |
50-60
amp breaker use 6 gauge /  Buy: 6-2 wire Southwire electric tools NMB is house wiring UF is underground |
40-50
amp breaker use 8 gauge / Buy: 8-2 wire Southwire electric tools NMB is house wiring UF is underground |
  Copper ground wire Use same size as other wire in circuit Buy: 12 gauge copper ground wire Ground wire Green ground wire Ground pigtails Ground rods/ ground clamps at Amazon |
 Buy End cutting nippers at Amazon |
  When removing insulation from wire, do NOT score or put cuts on surface of copper wire. Doing so increases resistances on wire and creates weak point. Buy tools: Wire strippers at Amazon Linesman pliers Utility knife at Amazon |
 Buy: Multimeter Electrical testers |
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Buy tools: Wire strippers at Amazon Linesman pliers Utility knife at Amazon End cutting nippers at Amazon |
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Do not solder solid copper wires togetherAmperage on wire is heat, and can melt solder causing failed connection, and fire hazard.Twist wires together very tight. Twist connector very tight. |
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Always best to twist wires .... but .... solid copper wires can be connected without twisting... Strip wires back to same length Use correct wire connector so it grabs both wires and covers all bare copper. Twist connector very tight. However.... a) Twisting gives permanence to connection. b) In high amperage usage, the wire connector can fail. c) Electricians twist wires  |
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How to connect stranded
wire and solid wire If stranded wire is thinner than solid: Strip back stranded wire so there is more copper visible than solid wire. Wrap stranded wire around solid copper. Leave solid wire straight. When connecting two solids and one stranded: twist solids together first, then wrap stranded wire around solids. Apply wire connector very tight. Pull stranded wire to make sure it is tight. If stranded wire is same diameter as solid: Cut off both same length Don't twist together, cover with wire connector. |
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1) Strip
stranded wire longer 2) Wrap stranded around the solid wire 3) Twist wire connector over both wires 4) Twist wire connector very tight 5) Pull stranded wire and make sure it will not come loose Silver-colored stranded wire shown in image is steel and not aluminum. Steel stranded wire is available on some small electrical devices to save higher cost of using stranded copper wire. Never use aluminum wire. Residential codes do not allow aluminum wiring. Aluminum wire is a valid conductor used for power lines, but connections require compression fittings and devices that are rated for AL. Improper use of aluminum inside a home is a fire hazard. Must use switches and outlets rated for AL. Connecting aluminum and copper using ordinary wire connector instead of specified compression fitting is fire hazard since the aluminum expands when heated by amperage. The expansion and contraction of wires loosens connection, creating gaps for arcing that causes more overheating, that begins to melt the connection, eventually failing. |
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 MultimeterTest for breaks in wire/ Test for voltageMost appliance require 80% rated voltage to function correctly Buy Multimeters at Amazon Electric testers at Amazon Resource: How to test and replace element How to test thermocouple Element tests for 120 volts How to test wire |
Safety
when testing wires: Never touch wet or previously flooded appliance. Never stand on wet surface when working on electric. Never stand on bare soil, put down dry boards. Tape tester leads to wood sticks to keep hands away from power. Use non-contact voltage tester before touching wires. Never touch or lean into any made of metal. Remove metal objects from pockets. Do not use oxygen or fuel accelerants in same room as electrical repairs Resource: Basic house wiring |
 Non-contact voltage testerTest for power without touching connectorsNEVER assume power is OFF Buy: Non-contact voltage tester Amazon Electric testers at Amazon Resource: How to test electric power is off |
Twist-on wire connector assortmentsDo not reuse old connectorsBuy: Connector assortment at Amazon Connector assortment at Amazon Resource How to select and install twist-on wire connectors |
Weatherproof wire connectorConnector cavity is full of siliconeBuilt-in cover keeps silicone in place Protect from water, dust etc Buy from my affiliate links Weatherproof size 14 to 6 Amazon Weatherproof size 22 to 8 Amazon Resource How to select and install connectors |
Wrench to apply wire connectors Tighten connector Buy: Wire connector blaster Twist connector wrenches at Amazon Resources: How to twist wire How to select and install twist-on wire connectors |
 Buy: Blue for 16-14 wire Yellow for 12-10 wire Resource: How to install terminals |
 TerminalsBuy:Terminal kit Blue for 16-14 wire Yellow for 12-10 wire |
Push-on wire connectors in place of twist-on connectorsBuy:Push on wire connectors Amazon Red 3P connector for 10-14 gauge wire Lever connectors for stranded wire at Amazon |
Buy End cutting nippers at Amazon |
When removing insulation from wire, do NOT score or put cuts on surface of copper wire. Doing so increases resistances on wire and creates weak point. Buy tools: Wire strippers at Amazon Linesman pliers Utility knife at Amazon End cutting nippers at Amazon |
 Use solid copper wire Fire inside timer caused by stranded wire Keep enclosure door closed at all times Buy: soldering guns Resource Timer caught fire |
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 Larger image Both wires MUST be same gauge Straighten each wire Tighten screw very tight against copper wire |
 Larger image Connect stranded and solid with wire connector and run jumper to screw plate. Or add solder to stranded wire to make solid. See example image |
 Household NM-B Wires are color-coded so inspectors/ electricians can easily identify which wire is used during construction |
Match
wire size and breaker amp rating If your home was wired by professional electrician who pulled permits, then circuit breaker and wire size will match. If manufactured home or travel trailer has not been altered by homeowner then breaker and wire size will match. If breaker is oversized for wire... fire danger Breaker can let too much electricity travel through the wire. Wire can overheat and cause fire. Call electrician if you suspect wiring is not correct, Absolute electrocution danger when removing cover off main panel. More information below. Main breaker terminals are still Hot when main breaker is turned off. Buy: Wire wire at Amazon Resource: Select correct wire and breaker size How to replace circuit breaker |
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-What is 3-phase electric: power plant to end
user -Basic house wiring |
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Resource: Compare box timers DPDT timers Intermatic Control water heater w/ Z-wave |
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