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The answer depends on what type of access you have to the junction box. The wire external to the box may have some slack that can be brought into the box. If everything is tight you will probably have to install one or more additional junction boxes or rerun wire from electric panel.

As an example assume that the short wire has no external slack, but you can install a new junction box near the other box and in the path of the short wire.

1. Pull the short wire from existing junction box.

2. Install new box in path of short wire so more slack will be available in the additional junction box; and pull wire into new box.

3. Run a wire of the same size from new to old box and re-splice any connections for original short wire or new connections; and connect this new wire to the original short wire in the new box.

Make sure you follow all code requirements for your locale.

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βˆ™ 13y ago
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βˆ™ 3w ago

You can splice additional wire onto the existing wire using wire connectors. Make sure to match the wire gauge and use proper insulation for safety. Cut the new wire to the desired length, strip the insulation, then twist together and secure with a wire connector. Finally, insulate the connection with electrical tape or heat shrink tubing.

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Q: How to extend a wire if an existing wire is short in the junction box?
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Can you extend an existing wire by just using wire nuts and electrical tape and no junction box?

No, extending a wire using just wire nuts and electrical tape without a junction box would not be up to electrical code and could create a safety hazard. A junction box is necessary to contain the connections and provide protection against potential issues like shorts, sparks, or overheating. It is important to follow proper electrical codes and practices to ensure safety.


How do you extend romex wire you moved an outlet you need to extend and connect?

To extend a Romex wire that you moved an outlet, you can cut the existing wire at the original outlet location and add a new piece of Romex wire to reach the new outlet location. Use wire nuts to connect the old wire to the new wire, making sure to match the colors (black to black, white to white, and bare copper to bare copper). Finally, secure the connections with electrical tape and install the outlet at the new location.


How do you add another porch light to an existing switch?

To add another porch light to an existing switch, you can run a new electrical wire from the existing light fixture to the new porch light location. Connect the new wire to the new light fixture, ensuring all connections are secure and following proper electrical wiring guidelines. Test the new porch light to ensure it operates correctly from the existing switch.


Can you extend power through a 3 wire switch leg for a half switched outlet to a new switch for a new light?

Yes, you can extend power through the 3-wire switch leg to a new switch for a new light. You would need to connect the hot wire to the common terminal on the existing switch, then extend the hot wire to the new switch, along with the traveler wire. At the new switch, connect the hot wire to the common terminal and the traveler wire to one of the traveler terminals.


How do you connect old home wiring to new wiring without a pigtail connection-There is not enough slack in the old wiring to pigtail and use a connector?

If there is not enough slack to create a pigtail connection, you can use a junction box to extend the old wiring. Cut the old wire short, strip the insulation, and connect it to a new wire with a wire nut inside the junction box. Make sure to secure the junction box properly and follow all local electrical codes.

Related questions

Do you need to use TC extension wire to connect a thermocouple or can you use shielded cable?

You must use thermocouple wire (of the same type as the thermocouple) to extend the circuit. If you switch to a different wire the point of connection between the two becomes a thermocouple junction itself, and the resulting voltage from that junction will skew your reading. You can use any wire to extend a thermocouple connection if you know the temperature of the junction where the thermocouple wire ends--this becomes the reference junction.


How do you extend an 240v wire circuit 2 feet longer?

If you do not add a junction box it looks like new wire all the way from the old junction box with new wire that is longer. It's a tough place to be.


Can you extend an existing wire by just using wire nuts and electrical tape and no junction box?

No, extending a wire using just wire nuts and electrical tape without a junction box would not be up to electrical code and could create a safety hazard. A junction box is necessary to contain the connections and provide protection against potential issues like shorts, sparks, or overheating. It is important to follow proper electrical codes and practices to ensure safety.


How do you add another porch light to an existing switch?

To add another porch light to an existing switch, you can run a new electrical wire from the existing light fixture to the new porch light location. Connect the new wire to the new light fixture, ensuring all connections are secure and following proper electrical wiring guidelines. Test the new porch light to ensure it operates correctly from the existing switch.


Can copper wire be used for thermocouple extention?

No. A thermocouple is made from two dissimilar wires. At the junction of these two wires, an electrical signal is generated that is measured in millivolts. If you insert another type of wire, such as copper, then you have introduced another electrical junction. Your signal will be (millivolt from junction 1 + millivolt from junction 2). <><><> Maybe. A thermocouple measures the temperature difference between the sensing junction (where the two different metal wires meet) and the other end of the wire, the reference junction. If you extend a thermocouple with copper wire, you will measure the temperature difference between the junction and the location where the copper extension is spliced on. If the copper splice is the same temperature as the reference junction, or if you can measure the temperature at the splice, then it will be fine. In general, it is better to run the thermocouple wire to the reference junction.


How do you extend romex wire you moved an outlet you need to extend and connect?

To extend a Romex wire that you moved an outlet, you can cut the existing wire at the original outlet location and add a new piece of Romex wire to reach the new outlet location. Use wire nuts to connect the old wire to the new wire, making sure to match the colors (black to black, white to white, and bare copper to bare copper). Finally, secure the connections with electrical tape and install the outlet at the new location.


How do you connect old home wiring to new wiring without a pigtail connection-There is not enough slack in the old wiring to pigtail and use a connector?

If there is not enough slack to create a pigtail connection, you can use a junction box to extend the old wiring. Cut the old wire short, strip the insulation, and connect it to a new wire with a wire nut inside the junction box. Make sure to secure the junction box properly and follow all local electrical codes.


Can you mix aluminum wire with romex in a junction box?

No, do not mix aluminum wire with copper wire.


How do you extend the electric outlet at the basement?

Parallel connect the new receptacle to a receptacle in the existing circuit. Black (hot) existing to black (new), white existing to white (new), ground existing to ground (new). Make the ground wire coming into the new receptacle box longer so that it can be looped around the ground screw located in the receptacle box first and then connect to the receptacle without having a break in the wire.


How do I move thermostat from downstairs to upstairs?

There are two types of thermostats. One is line voltage and will require a splice be made in the old thermostat junction box . From the old box a new cable has to be pulled to the new thermostat junction box. This wire must be of the same size as the existing wire.The other type of thermostat is low voltage thermostat. This uses usually # 22 size wire and because it operates on low voltage it does not need a junction box to make a splice in. Solder and tape the new wire on to the old piece and then take it to where the new thermostat is to be located.


Can you junction box 8ga wire with 10ga wire?

There is no restriction on different size wires being spliced in the same junction box. If your question involves splicing 8ga. to 10ga, this also is not a problem so long as the circuit allows for 10ga wire.


Can you extend the antena wire?

You can extend an antenna wire, but the added length will reduce amplitude of received signal. You may need an in-line amplifier depending on the application and length of antenna wire.