06:10AM | 06/21/06
Member Since: 05/23/05
24 lifetime posts
What is the difference between the plug-in recepatcles over 200 volts? For instance my clothes dryer is a large 220v 3prong, and I see smaller 3prong plugs,[that i assume are 220v] with the prongs running in different directions. I want to install a window/wall A/C but I see some with one prong running no./so.and the other east/west. One plug the prongs were both in flat [east/west] direction. And some have the Larger 220v plug like my clothes dryer. I have a some experience doing simple 220v wiring like clothes/dryer and water heater right from the service panel but I want to make sure I'm able to do this as easily as the other appliances I mentioned. Are these plugs different to make sure the unit gets it's own circuit, and prevent overloading? Just curious, otherwise I'll stick to what I'm familiar with, the 115v ones. Thank You for the info.


04:24PM | 06/21/06
Member Since: 04/25/05
1915 lifetime posts

This shows all of the standard receptacles and plugs.

They are designed so that, with two exceptions, the plugs will only fit into the corresponding rectacle of the same voltage and current rating.

The excepts are that 15 amp/120v plugs can be also plugged into 20 amp/120v receptacles. And likewise 15amp/240v plugs can 20amp/240v receptacles.

In general the rectpacle is matched to the voltage and current rating of the circuit.

Note the different series of 240 volt receptacles.

The 6-xx is for 240 volts ONLY and does not have a neutral.

The 10-xx series has a neutral and is for 240/120 volt loads. However, it does not have a GROUND. It is used for older dryer and stove installations.

New dryer and stove circuits will have 4 wires (2 hots, neutral, and ground) and will use the 14-xx series.

A 240v window AC would use the 6-xx series.


07:53PM | 06/21/06
Member Since: 05/23/05
24 lifetime posts
Actually after I did a lil thinking and looked at the different receptacles I think it's all about the amps. I noticed the smaller 230v plugs are 15amp and 20amp and I CAN use smaller wire gauge. The 30amp larger receptacles get the larger gauge wire.
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