Simply cut the cable where it has to be spliced to tap into an existing wire with a connector. Strip both ends of the existing cable as well as the end of the new cable you wish to introduce. Attach a wire nut of the proper size to each of the three wires. You don't want to overload the wire nut by landing on three cables at the same time. That would be painful.
If you're lucky enough to have access to the interior of your home, there are usually blank walls that can be used for wiring changes. This is especially true if you have a home built after 1990 since most houses were built with wall outlets in every room. If you don't have access to the interior of your home, you'll need to run new wiring. This new wiring should be located in a compartmented panel attached to the exterior of your house or garage. This prevents exposure to the weather which will damage the system over time.
You should plan on this type of work taking up to a month to complete. It's best to schedule some time away from work during this period to keep the excitement level high and to allow for any problems that may arise.
Electrical wiring runs throughout your house providing energy to various appliances and devices. In order to make these connections safely and securely, all wiring needs to be done by a qualified professional. Electrical wiring is not a job for everyone and should only be done by someone who knows what they are doing.
Cable Pulling Techniques In a perfect world, you'd be working with a conduit that still had old wire going through it. In these circumstances, simply connect the old wire's end to the new wire's end and use it as a pull wire to draw the new line through the conduit. This is the most efficient method because you're not wasting any cable.
If the old wiring is in poor condition (i.e., broken or open circuits), then you'll need to replace it before pulling more cable. However, if the old wiring can still serve some purpose even though it is no longer direct, then leave it in place while you pull the new cable.
Old wiring should never be cut without first using a voltage tester to make sure that there are no live wires left behind. If any parts of the old wiring are still attached to functioning equipment, have a qualified technician repair or replace them before cutting them free from the old structure.
The new cable will need to be pulled through the conduit carefully so as not to damage it. Use plenty of plastic tape to bind each end of the cable while you work.
When pulling cable, always use pull loops or tie wraps to secure the ends of the cable you're pulling. This helps to prevent unnecessary strain on those cables when pulling more cable or other objects that may come along during installation.
Size-appropriate wire connections, anti-corrosion lotion, electrical tape, junction box, and blank cover Splicing onto an existing cable and extending it to a new place is OK; however, be sure you splice all wires together color to color, including the ground wire. This will prevent any electricity from flowing through your body if you're not careful with how you connect the wires.
The best way to splice a wire is with a metal connector. These can be bought separately or as part of a splicing kit. They provide a durable connection that's easy to verify. If using one of these connectors, cut off both ends of the old wire, pull out any insulation sheathing that remains, slide on the connector, then twist each end of the wire into the hole in the back of the connector until they are secure.
If you don't have access to a metal connector, try using heat-shrink tubing to seal the connection instead. Cut off both ends of the old wire, strip about 1/4" (6mm) of insulation sheathing from each end, slide the heat-shrink tube over one end of the old wire, apply electric heat using a torch or other heater source, and shrink the tube around the old wire to secure it.
It's also possible to use rubber cement or plastic glue to join the wires together before inserting them into the junction box.
The Best Wire Connectors If you come across wires that have been linked using electrical tape, or wires that have been twisted together and then wrapped in electrical tape, remove the tape and attach the wires with wire nuts. Never use tape in place of wire nuts since it is insufficiently secure and prone to harm. A short circuit could cause fire or serious injury.
Electrical tape is useful for keeping cables together while you work. But if you want to make a permanent connection between wires, use wire connectors instead. These are designed specifically for connecting up wires safely and securely, and can usually be removed later if needed.
Tape is also useful for temporarily holding wires together when you need to move them around or make adjustments before they're permanently attached to something else. For example, if you're working with cable and need to keep it out of the way while you work, you can tape one end of it to a nearby surface. When you're done, just remove the tape.
Taping wires does not provide enough friction for a safe connection, so use wire connectors instead. It's best to avoid tying knots in wiring unless you know what you're doing, because any knot you make will eventually become untied, causing parts of the system to be disconnected.
If you do need to make a temporary connection, tape works well for this purpose.
Inside a panel, wire splices are frequently required to repair a double-tap at a breaker (two wires under one breaker connection) using a short wire called a "pigtail," extend wires that are a little too short when a panel is replaced, or move circuits from a main panel to a subpanel for a re-wiring project. Wire splices inside panels can be either metal-metal or plastic-metal. Metal-metal splices are usually done with metal connectors and metal wire. Plastic-metal splices use special plastic connectors that are fused together with heat to connect wires by melting the plastic around them.
The best way to splice wires into an electrical panel is with a metal-metal wire splicing kit. These kits include fine-point wire strippers, metal-sheath wire nuts, and metal-sheath ground cables. Before working on live power, always check the voltage on the stripped ends of the wiring first. If they're the same voltage, then the work is safe to perform without risk of electrocution. Finish the job with a wire nut and seal it with hot glue or silicone caulk for protection against moisture.
For other options, see our article on how to splice wires safely. It's important to understand the difference between a metal connector and a metal box/frame. A metal connector is used to join two pieces of cable together. A metal box is used to enclose and protect a section of cable.
Cover the nicks in the wire insulation with electrical tape. Inline barrel crimp splice connections perform effectively in situations where wires may be cut short. Use a broad crimping tool to get a good crimp on the spliced wire. Do not use metal shears to cut electrical wiring because they will damage the wire gauge.
The best way to protect electrical wiring from damage is by regular maintenance of outdoor lighting. Wires should be inspected for damage after installation as well as before any major outdoor work begins. Any broken or frayed wiring needs to be replaced. Outdoor lighting fixtures also require replacement of ballasts every few years or when lamps burn out. This prevents excessive voltage being applied to live wiring which could spark a fire.
If you are lucky enough to find only dead wires at the site of a storm damage repair, you can be sure that the problem lies within your distribution panel. The presence of live power is usually indicated by a burning fuse or circuit breaker. If all the other lights are out, check to see if any breakers are closed. You should have one for each branch circuit in your home. These should open when you need them to and close when you aren't using that circuit. For extra safety, don't use a ladder to reach high-up places like light switches or outlets. Use safe working practices and stay away from live electricity!