Ungrounded receptacles and Washing Machines.

So, let us look at the laundry area since most people will want to have cloth washing machine installed in their new abode.There are the requirements for grounded receptacle in the laundry area. The actual requirement goes back as early as 1947.

Here is the code article that addresses this requirement.

NEC 1947

Article 2124b.

At least one receptacle outlet shall be installed for the connection of laundry appliances. The receptacle shall be of a 3-pole type designed for grounding.

So this code reference require a receptacle for the laundry area and that the required receptacle be designed for a ground.

A little more history on grounded receptacles and plugs. The first patent for a grounded plug and receptacle is from George P. Knapp working for the Harvey Hubbell company, the patent was applied for in 1915 and granted in 1916. The grounded plug that we in the US are familiar with (two vertical blades and a round grounding pin) dates back to 1928. It was invented by Milwaukee School of Engineering student Philip F. Labre supposedly to protect his landlady from shock. His applied for the patent in 1927 and was granted in 1928.

Now let's leap forward to  more modern time. If you are buying a home that predates the modern grounding system when it come to you washing machine you will need to perform an update to the electrical system to actually use your washing machine as required and in safe manner. All washing machines today require a grounded electrical connection.

 

Little side note one of the largest shock I ever received was from an ungrounded washing machine when I leaned against it with my gluteus maximus. Once you flex that muscle from electrical current you never forget!!

From Whirlpool-

• This washer is equipped with a power supply cord having an earthing plug.

• To minimize possible shock hazard, the cord must be plugged into a mating, earthing-type outlet, earthed in accordance with local codes and ordinances. If a mating outlet is not available, it is the personal responsibility and obligation of the customer to have the properly earthed outlet installed by a qualified electrician.

• If codes permit and a separate earth wire is used, it is recommended that a qualified electrician determine that the earth path is adequate.
  
  

Also from Whirlpool-

EARTHING INSTRUCTIONS

For an earthed, cord-connected washer: This washer must be earthed. In the event of a malfunction or breakdown, earthing will reduce the risk of electrical shock by providing a path of least resistance for electric current. This washer is equipped with a cord having an equipment-earthing conductor and an earthing plug. The plug must be plugged into an appropriate outlet that is properly installed and earthed in accordance with all local codes and ordinances.

WARNING: Improper connection of the equipment earthing conductor can result in a risk of electric shock.

From GE-

Plug into a grounded 3 prong outlet.

DO NOT remove ground prong.

DO NOT use an adapter.

DO NOT use an extension cord.

Failure to follow these instructions can result in death or electrical shock.

From Amana-

What is not covered by these warranties

• Connections to improper electrical current, voltage, or supply.

So as you can see not only is it required by manufacturers to be grounded it may result in shock and could void your warranty.

In addition if this modification is performed under the 2014 NEC will most likely require AFCI and GFCI protection also.

“We are all born ignorant, but one must work hard to remain stupid.”

Benjamin Franklin

If you find any errors or have additional information that would expand on any code, building standards or manufacture requirements please let me know.

NCW Home Inspections, LLC  is a Licensed Washington State Home Inspection service located in Wenatchee Washington serving Chelan County, Douglas County, Kittitas County, Okanogan County and Grant County Washington and the cities of Wenatchee, Leavenworth, Cashmere, Oroville, Cle Elum, East Wenatchee, Quincy and many more…  

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