How do I attach both my washer and dryer to the same NEMA 14-30 receptacle?


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On Fri, 22 Oct 2004 06:23:19 GMT, Vatsal Thakkar

All older US built 240V electric Clothes Dryers have always had a parasitic 120V load on the ground, and unless they've been forced to change their designs recently it is still true... Even if they use a 240V timer motor and controls, they've never required you to find a 240V lamp for the inside-the-drum light, they use a standard 120V bulb. So in that case, yes, the air compressor is actually a little bit safer to use than the dryer.

If the safety ground on the dryer gets disconnected and the door left open, you can have 120V potential on the outside enclosure of the dryer (current limited by the lamp filament, but still potentially lethal) because it uses the safety ground as a neutral return for the lamp.

(They could add a control transformer to drop the 240V for the lamp load, but that would cost money - the competition would save $10.)

The old three-wire NEMA 6-30R dryer connection is...

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Electrical Plug for a Washer Dryer
Electrical Question: Will my 240volt 3 prong outlet work with a new dryer with a 250volt with a 4 prong cord?

I want to buy a Bosch vent less washer and dryer, the washer dryer combo uses 240volts with 3 prongs. My outlet in the laundry closet has 30 amps 125/250volts with four prongs. Will it work and will the new dryer plug cause any damages by using a 240v 3 prong with outlet with 250v with 4 prong?

Please let me know.

This electrical question came from: Bill, from New York City, New York.
See more about Home Wiring for New York

Additional Comments: I love this site for an office worker that does not know any about electric wiring and usage?

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

3 Prong and 4 Prong Plugs for a Washer Dryer Combo

The new washer and dryer unit should work with your existing plug if it has the same configuration. The typical dyer circuit is 30 amps...
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For a 4-wire hook-up, the frame of a 120/240 volt

machine must NOT be connected to neutral

terminals. It MUST be connected to the 4th wire

(green) of the power supply or to the metallic

covering of a 3-wire supply.

If a 4-wire receptacle of NEMA

type is used, a matching U.L. list-

ed power supply cord (pigtail)

must be used. This cord contains

four No. 10 copper conductors

with spade or ring terminals on the dryer end.

The 4th (grounding) conductor must be identified

by a green cover and the neutral conductor by a

white cover. The cord should have a suitable

strain relief, and should be a minimum 4 feet

long. The power supply cord and strain relief are

not provided with the dryer.


1. Remove the terminal block cover.

2. Remove the ground strap screw from the

terminal block support. Fold the...

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With the types and number of storms we’ve been getting, you might be looking for a new generator, or hauling out the one you’ve been storing in the garage. Unless you already have a transfer switch, you don’t want to be caught off guard with an inadequate generator extension cord. Make sure that it is of sufficient gauge and length for your purposes. Remember, you must keep the running generator AWAY from any living space. Don’t put your family in jeopardy because your cord is too short. ALWAYS be safe.

What Are the Differences?

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Here you will find out what you need to know about extension cords for portable generators. These are also referred to as generator cords.

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This fact doesn’t stop nearly everybody from calling the wall-mounted box that supplies 240 volts of electricity a “charger.” That box, cord, and plug have a technical name—Electric Vehicle Service Equipment or EVSE—and if you have an EV, you’re going to want to install one at home.

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The national debate can arguably be summarized by the question: In the past two years, has there been enough change? Has there been too much? Meanwhile, many Americans continue to face change in their homes, bank accounts and jobs. Only time will tell if the latest wave of change Americans voted for in the midterm elections will result in a negative or positive...

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