How To Make an Electrical Splice

By - Summary:

How to Splice Wires of an Electric Circuit: Preparations for Making an Electrical Wire Splice, Junction Boxes and Wire Splices.

Guide to Splicing Electrical Wires

Electrical Question: I’m installing electrical wiring with in the ceiling joists.

  • I have to splice wiring between the joists for additional lights.
  • I do not want to use a junction box and avoid having an access panel.
  • Can you tell me what are approved residential in wall splices and who the manufacturers are?

Thank you, John.

Background: John, a Homeowner from St. Paul, Minnesota.

Dave’s Reply:
Thanks for your electrical question John.

Preparations for Making an Electrical Wire Splice

  • Skill Level: Intermediate to Advanced.
  • Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester.
  • Estimated Time: Depends on the personal level experience and ability to work with tools and access to the wiring.
  • Precaution: Identify the circuit, turn it OFF and then Tag it with a Note before performing any wiring.
  • Notice: Installing additional electrical wiring should be done according to local and national electrical codes with a permit and inspected.
  • Special Materials: Properly sized wire connectors, anti-corrosion ointment, electrical tape, junction box and blank cover.

How to Splice Wires of an Electric Circuit

  • Electrical wiring splice must be made  in an approved junction box, enclosure or container.
  • The junction box must have a cover installed and must not be left open.
  • The electrical junction box or wiring enclosure must be installed in an area that is accessible.
  • Electrical wiring splices must be made with approved electrical connectors, for the type of wire, the wire gauges and number of wires being spliced together.

More about Splicing Electrical Wires


  • Electrical Junction Box Splice
  • Electrical junction box splices can be made safely when you understand the method.
  • This example will show you how its done step by step and shows how to make a junction box splice and the related electrical codes.

Electric Panel
House Wiring Circuits and Circuit Breakers
This article looks at common 120 volt and 240 volt house wiring circuits and the circuit breakers that are installed identifying the types and amperage sizes used in most homes.

Junction Boxes
Electrical Junction Boxes for Home Wiring
Understanding electrical junction boxes and what they are used for. Home electrical wiring is the process of installing electrical wire to a location that will serve electrical devices or an appliance. One very important component is the box where the wire will be installed. The type and size of the home wiring electrical boxes will depend upon the circuit size, application and its location.

Repairing Electrical Wiring
Repairing Electrical Wiring
Repairing Electrical Wiring
Electrical Splices – Part 1 – Emergency electrical wiring repairs should be made using the right materials for your particular application. Here are a few choices to help you decide what you’ll need.

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» Click here to learn more about Home Electrical Wiring «
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Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all projects.


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FAQs Frequently Asked Questions and Comments

2 Responses to “How To Make an Electrical Splice”
  1. Dave Rongey says:

    Hi Francis,
    Have you seen the section about how to wire a home which includes home wiring diagrams

  2. mangana says:

    Could you please send me a wiring diagram for home?


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