![]() I know for the purest on proper plug requirement the three prong dryer plug is the wrong plug to use because the third prong is thought of as being the neutral. Verify that there is at least 110 volts present into and out of the power supply. An electric dryer may run with a partial voltage of 120 volts but it will not heat. The plug on a electric dryer is optional, because, in many houses, the appliance is hardwired into the house circuitry. All of our heated towel racks are electric 'dry' (liquid/oil-free) units and most can be installed 'upside down'. The dryer should be on a separate, dedicated 208V/240V electrical outlet. I don’t understand why it wouldn’t be safe to use the dryer socket to plug in your compressor because the neutral and ground should be bonded in the main service disconnect panel effectively making the third prong on your plug also a ground. In the early 1990s, electric dryers used a 3-prong cord for a 240-volt circuit. This compact plug-in model is a great way to add a towel warmer to any bathroom. Your existing dryer circuit using three wires technically can be used for your compressor because the compressor does not need 120V so it doesn’t use a neutral. The neutral and ground are now required to be separated. The new way is to use four wires, 2 hot, 1 neutral and 1 ground. The neutral and ground was bonded at the appliance so technically the one wire was being used as both the neutral and ground. The 4-wire power supply cord, at least 4 ft (1.22 m) long, must have four 10-gauge copper wires and match a 4-wire receptacle of NEMA Type 14-30R. AC WORKS WD6501050 6-50P Welder Plug to 10-50R 3-Prong 50A 125/250 Volt Older Dryer/Range Adapter. The old way of wiring for dryers and stoves was to use three wires, 2 hot and 1 neutral/ground. If you want to run 240 and 120v from the dryer plug it needs to have 4 prongs or wires running to it. Dryers and stoves have a neutral because they have controls and or timers that use 120V so the neutral is needed to provide 120V.
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