Ask Electrical Question
E Books

How to Replace a Razor Only Receptacle With a GFCI

Author:  Terry Peterman    Do you live in an older home and have a bathroom outlet that is identified as “razor only”?  Nowadays the expectation is to have a bathroom outlet that facilitates a multitude of rechargeable items such as rechargeable razors, electric toothbrushes, curling irons, blow dryers and more!  You can easily replace that older style “razor only” outlet and upgrade your bathroom with a much safer Ground Fault Circuit Interrupter (GFCI) receptacle.  The following article provides step-by-step instructions on how to do so.

In many older homes, you will find that they have a “razor only” receptacle in the bathroom.  These usually have a polished silver plate, mounted in a 4” X 4” box, and the outlet has only two prongs.  These were designed to isolate you from the grounded electrical system in your house by limiting the amount of current that could flow in a fault condition.

Razor Only Receptacle

The Problem:

These are one-to-one transformers that have a fairly low load capacity and cannot operate today’s appliances, such as curling irons or blow dryers.  Also, changes to the electrical code required that these receptacles be connected to the light switch, so that they were on only when the bathroom was occupied, as they tended to get warm, and even hot, creating a potential fire hazard.

This is a problem if, for example, you use the outlet to plug in your re-chargeable electric toothbrush, or razor.  The batteries will only charge when the light is on.

Changes to the Electrical Code:

Today’s code requires that a GFCI breaker protect the outlet in the bathroom, or that the outlet itself be a GFCI receptacle.

A GFCI device protects you from electric shock by measuring the flow of electricity (current, or amps) and checks that all the current used by the appliance returns to earth via the neutral conductor.  If all the flow of current is not accounted for, down to as small of a leak as 5 milli-amps, (.005 amps), then the circuitry inside the GFCI device will trip in as quickly as 1/30th of a second.  This protects you from getting a shock, or at least a bad enough shock to seriously hurt or even kill you.

GFCI Receptacle

GFCI Conversion Kit:

You will need is a GFCI conversion kit, and one of the best that we have found is manufactured by TEMCO.   You can purchase this at your local home improvement or hardware store.

GFCI Conversion Kit

Step One:

SAFETY FIRST!  Start by ensuring that the power is OFF.  You will need to arrange for some light, as the circuit that feeds the bathroom will have to be shut off before starting the project.

1.  Get a good battery powered flashlight or work light, or run an extension cord from an outlet on another circuit and set up a lamp or trouble light to work with.
2.   Check the panel directory to shut off the correct circuit.  Remember that often the panel directory is incorrectly identified as changes may have been made through the years, and not documented.
3.  Verify that you have the correct circuit shut off by checking with a voltage tester, or just plug in an electric radio in the razor outlet and then when you have the right breaker shut off, the radio will quit.

Step Two:

Start by removing the screws in the faceplate of the razor outlet.

Step Three:

Remove the screws that mount the transformer bracket to the 4” square device box. (You may have to pick out years of accumulated paint from the screw slots to enable you to remove the screws with the appropriate screwdriver.)

Remove the screws that mount the transformer bracket

Once the screws are removed, it is a good idea to use a sharp knife to carefully cut the joint between the mounting plate and the wall, so that when you remove the bracket, the paint doesn’t stick to the plate making paint and/or drywall repairs necessary.

Carefully Cut the Joint Between the Mounting Plate and the Wall

Step Four:

Once the plate is removed, take note of how the wires are connected.  You will have at least one black or red wire, and a white wire in the box.

Note the Wiring Configuration Razor Only Outlet

In this example, we are fortunate to have both an unswitched conductor (black wires), and a switched conductor (red wires), along with neutral (white wires) spliced in the box.

Razor Outlet Connected to the Red Wire and White Splice

The razor outlet is connected to the red wire (the switched conductor continuing on to the light fixture), and the white splice (neutral).

Use the Unswitched (Black) to Connect the GFCI

We can use the unswitched (black) splice to connect the GFCI receptacle, so that it will remain live, or hot, even when the switch is off.

Step Five:

Disconnect the wires to the transformer of the razor outlet.  Then toss it in the trash, as it is no good to anyone and does not meet today’s code, so it shouldn’t be re-used for anything but a paperweight.

Step Six:

You will probably have to connect a ground wire to the ground screw as the ground wire (s) were likely cut off.  As no tail was required for connection to the razor outlet, one wasn’t required.

You will need one ground wire for the GFCI receptacle ground (green) screw.  You may have to pigtail in a ground wire, wrap it around the screw and tighten it, and then onto the GFCI ground screw.  Always ensure that the ground path isn’t interrupted.

Connect a Ground Wire to the Ground Screw

Step Seven:

Mount the adapter bracket to the box using the box screws.

Mounting the Adapter Bracket

Step Eight:

Bring the wires out through the rectangular hole in the plate for connection to the GFCI receptacle.

Bring Wires Through the Plate

Connecting Ground Wire to GFCI Receptacle

Step Nine:

Connect the white wire(s) to the white or silver identified terminal of the GFCI receptacle.

Connect White Wire to Proper Terminal

If you have more than one wire, you can pigtail (splice the existing wires together, along with a short jumper wire for connection to the screw, using an approved wire connector).

You can also cut and strip both wires to the correct length and push them in under the terminal in the appropriate holes, and tighten the screws.  (That is how I connected them in this example).

Connect to the terminals identified as ‘line’, and NOT the ‘load’ terminals (see GFCI Receptacle diagram below for reference).


Step Ten:

Repeat step #9 for the black conductors

Connect Black Wire to Proper Terminal

Step Eleven:

Splice the red wires together using an approved wire connector and tuck carefully into the back of the box.

 Step Twelve:

Once connected, check your connections by pulling on them to ensure that they are tight.

Check All Wire Connections

Step Thirteen:

Mount the receptacle into the adapter plate using the device screws provided.

Mount the Receptacle into the Adapter Plate

Step Fourteen:

Put on the silver faceplate with the screws provided.

Step Fifteen:

Remove the protective film as the final step.

Remove the Protective Film From the Plate

Step Sixteen:

Now you are ready to restore power to the circuit.  Make sure that the light works, and press the reset button on the GFCI receptacle.

Testing the GFCI Receptacle

Then press the test button, and the GFCI should click, and the reset button will pop out.

Testing the GFCI Receptacle

Reset again, and test the outlet with a circuit tester, or better yet, an electrical device such as a blow dryer, lamp, or radio.

Step Seventeen:

Clean up the mess, and pat yourself on the back for a DIY job well done!

In summary, replacing a razor only receptacle  not only provides you with a safer outlet  that provides GFCI protection in your bathroom, but allows you to plug in all of your modern chargeable appliances.

Not sure if you want to tackle this yourself?  Remember: Can’t do it yourself? Get help from a qualified electrical contractor/

This entry was posted in Indoor Wiring, Receptacles and tagged , , , , , . Bookmark the permalink.
  • Big Thanks – this was very helpful!

  • Laurel

    I recently replaced my old razor only outlet with a GFI outlet.  It had a ground, white and black.  
    The problem is a night light will not work in the outlet (the night light works fine elsewhere.  The GFI light is on (it runs the hair dryer fine)  So why won’t the night light work?????

    • lightbright

      that circuit will only work with the light on in ther bathroom as it connected to the light switch

  • Oscar Marin Herrera

    I love this web page

  • Oddly, neither of my Oral-B toothbrushes, which draw very low power, will charge on either of my protected outlets.

  • dan

    What is the plate model number? All the ones at my electrical supplier don’t quite line up.

  • robby marleau

    can anybody find me a link to where I can buy this kit??

  • mikep

    If the old razor-only receptacle is wired behind the light switch, and I replace it with a GFCI , in order to run a hair dryer, and if the light switch is a dimmer, which seem to normally max out at 600 watts (although there are some higher wattage ones for more money) – then it appears to be a safety issue, as the hair dryer draws a lot more power than the dimmer is rated for. In this scenario, it seems necessary that the circuit be modified as described in the example, such that the GFCI does not sit behind the dimmer light switch. The dimmer, in a test of the original configuration, got very hot, with the hair dryer on high.


The Basics of Household Wiring DVD

"If you're looking for a good reference to help you understand simple home wiring, I personally recommend 'The Basics of Household Wiring' DVD".

Terry Peterman, the Internet Electrician
Electrical Wiring
Electrical Diagrams
How To
Electrical Tools
Electrical Videos