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Electrical Wire and Cable

Electrical Junction Box Access

Installing Electrical Wiring and Junction Boxes – Electrical Code for How Many Wires in Junction Boxes – There is always the possibility that electrical wiring connections or splices could become faulty so the required access is necessary perform inspections an repairs as needed.

Why Electrical Junction Boxes Must be Accessible
Electrical Question: Can an electrical junction box be buried in a wall or a ceiling without any access at all?

This electrical wiring question came from: Salvatore, a Homeowner from Santa Ana, California.

Related Question:

This electrical wiring question came from David in Baton Rouge, Louisiana.

Dave’s Reply:
Thank you for your electrical wiring questions.

Installing Electrical Wiring and Junction Boxes
A junction box cannot be buried in a wall or a ceiling. Junction boxes must be installed only where they will be accessible. There is always the possibility that electrical wiring connections or splices could become faulty so the required access is necessary perform inspections an repairs as needed.

More about Home Electrical Wiring

Electrical Junction Boxes

Electrical Code for How Many Wires in Junction Boxes

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.

Electrical Code
Electrical Code
Home Electrical Code
Electrical Code Directory covering AFCI circuit, electrical-boxes, electrical-circuit, electrical-code-outlets, electrical GFCI, electrical-grounding, electrical-project, electrical-services, electrical-underground, electrical-wiring, electrical-wiring-code, lighting-codes and smoke-detectors.

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Complete Guide to Home Electrical Wiring

Perfect for Homeowners, Students,
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Wiring GFCI Outlets
Wiring Home Electric Circuits
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Wiring Light Switches
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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 Electric Wiring Projects.

Electrical Tip

The Safest Way to Test Electrical Devices and Identify Electric Wiring!

The Non-Contact Electrical Tester
This is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester, [amazon.com], I use for the detection of Standard Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use.

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FAQs Frequently Asked Questions and Comments

2 Responses to “Electrical Junction Box Access”
  1. Steve says:

    Is it considered “accessible” if junction box is in attic or crawl space? But can readily be seen following wires (in line of sight). Also is there a rule that junction boxes should be vertical or horizontal, or is best accessibility 1st consideration?

    • Dave Rongey says:

      Hi Steve,
      A junction box does not have to be visible necessarily, whereas insulation may cover the box, however the concern is that the box may be accessible to perform any work or check the wiring. If a standard indoor junction box is located in a sheltered area such as an attic or crawl space then the position is not a factor as long as the box is still accessible to do work.
      I hope this helps,


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