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Method to Convert 220 volt to 120 volt


Voltage Converters or Transformers for Specific 120 Volt Applications – A 120 volt circuit cannot be tapped off of a 220 volt circuit simply because there is no insulated neutral wire conductor that is used in this type of 220 volt circuit. However you may install a transformer or voltage converter which when installed correctly can produce the desired 120 volt circuit.

Voltage Converters or Transformers for Specific Applications

  Electrical Question: On the ranch that I am working on there are three outdoor street lamps installed and they are all individually powered by their own 220v power line. The routing of one of the lines goes to a junction box and then continues to the street light. The junction box is attached to the side of a barn. I would like to install a receptacle with 110v in this barn. Would it be possible for me to safely tap into the 220v junction box for my power supply and if so what supplies should I have ?

This electrical wiring question came from: Russell, a Handyman from San Diego, California.
See more about Home Wiring for California

Dave’s Reply:
Thanks for your electrical wiring question Russell.

Voltage Converters or Transformers for Specific 120 Volt Applications

A 120 volt circuit cannot be tapped off of a 220 volt circuit simply because there is no insulated neutral wire conductor that is used in this type of 220 volt circuit.  However you may install a transformer or voltage converter which when installed correctly can produce the desired 120 volt circuit.  Make sure that you are purchasing the correct size converter for your specific application and the devices that you will be connecting to this type of power supply are compatible. Russell, be aware that the 220 volt lighting circuit may be energized all the time if the light fixtures are controlled by photocells. I would recommend that you have a qualified electrician assist you with this project.

To locate a supplier  just search for : 220 to 120 Voltage Converters & Transformers

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FAQs Frequently Asked Questions and Comments

4 Responses to “Method to Convert 220 volt to 120 volt”
  1. Dave Rongey says:

    Sure Joe, here is an example with the basics:
    The power source must be decided for what is available at a typical location, this will specify the size of the primary cable and the size and type of male plug or cord body that will be used.
    The primary cable would be 4-wire, 2 Hots: Black and Red, 1 Neutral White, and the Ground. The primary cable is connected as the LINE to a 2 circuit panel, the Neutral and Ground wires attaching to their own separate terminal blocks.
    One 2-pole circuit breaker is installed in the panel which would provide 2 circuits of power out to a 2-gang metal outlet box. The Cable feeding the outlets would be a 4-wire like the primary cable but sized to the circuit, possibly 15 or 20 amp for example. Of the cable to the outlet box the black wire connects to one outlet, red to the other, the neutral is shared, the ground shared and bonded to the box. Connections to the outlets as noted in wiring diagrams section.
    Hope this helps – send me a tune!
    Dave

  2. joe says:

    I would like information on how to build a converter box with a 220 volt plug and cable going in the top of the circuit breaker box and 4 20amp/120vac 4 outlet recepticles coming out the bottom. I have seen them and used one before when i was performing in a band at bar plug into a 220 recepticle on the wall, it was portable
    thanks

  3. Steve Wiser says:

    Would it be possible for me to safely tap into a 220v junction box (with an insulated neutral wire) for a 110 power supply?

  4. Ali Bajaber says:

    How can I install my own power generator at home, using solar source or wind? What kind of materials needed for that purpose, and where can I get them??