![]() ![]() The International Electrotechnical Commission (IEC) publishes a web microsite World Plugs which provides the main source for this page, except where other sources are indicated. Foreign enclaves, extraterritorial government installations, or buildings frequented by tourists may support plugs not otherwise used in a country, for the convenience of travellers. In some areas, older standards may still exist. Physical compatibility of receptacles may not ensure compatibility of voltage, frequency, or connection to earth (ground), including plugs and cords. Voltage, frequency, and plug type vary, but large regions may use common standards. Often different sockets are mandated for different voltage or current levels. By connecting across the phases, 240 V is available for large appliances. Most sockets are connected to 120 V and neutral. For example, in North America the supply to most premises is split-phase, with 240 volts between phases and 120 volts between either phase and neutral. (For industrial machinery, see industrial and multiphase power plugs and sockets.) Some countries have more than one voltage available. Mains electricity by country includes a list of countries and territories, with the plugs, voltages and frequencies they commonly use for providing electrical power to low voltage appliances, equipment, and lighting typically found in homes and offices. Nominal frequency and voltage by country for portable appliances Hopefully, this post helps advance the understanding of this particular section of the Code.For broader coverage of this topic, see Mains electricity. I would agree it is better form to have those circuits separated but the Code allows it if someone so chooses. Therefore you could use the double-pole breaker exception cited above. Since you stated the rest of the garage I concluded your dryer was installed in the garage. There is a Code requirement that prohibits the garage circuit from supplying outlets outside the garage. Individual single-pole circuit breakers, with identified handle ties, shall be permitted as the protection for each ungrounded conductor of multiwire branch circuits that serve only single-phase line-to-neutral loads.Īdditionally, you stated the previous owner continued the 120 volt circuit Circuit breakers shall open all ungrounded conductors of the circuit both manually and automatically unless otherwise permitted in 240.15(B)(1), (B)(2), (B)(3), and (B)(4). (B) Circuit Breaker as Overcurrent Device. However, single pole breakers with a handle tie do NOT satisfy this other section of the Code. 2: Where all ungrounded conductors of the multiwire branch circuit are opened simultaneously by the branch-circuit overcurrent device. ![]() 1: A multiwire branch circuit that supplies only one utilization equipment.Įxception No. Multiwire branch circuits shall supply only line-to-neutral loads.Įxception No. A double pole breaker satisfies this requirement.Ģ10.4 (C) Line-to-Neutral Loads. There is an exception that allows line to neutral loads and line to line loads on the same Multi-Wire Branch Circuit as long as the circuit breaker opens all ungrounded conductors. If you read my answer to that other question you cited and read the National Electrical Code carefully, you will see that your case was NOT necessarily a Code violation. So best advice install dryer circuits for dryers and add general power circuits for general power. Some could make an argument that it might not affect the dryer but we don't design circuits around what they might do. He would be in his right to void the warranty. By the way if you have a problem with your dryer and call for warranty repair and the service representative sees the attached receptacles. To add devices that should be protected by these breakers to be attached to a 30A breaker would they have to meet a whole new set of requirements. I also have a question about what your overcurrent protection looks like since most branch wire is protected by 15A and 20A breakers. Depending on what you put on the circuit, it could create an imbalance (impedance) between the two phases and directly affect the life of both the circuit and piece of equipment. That means the original circuit installed is a specific circuit designed to service a dryer, not a dryer and anything else we can stick on it. ![]() Adding receptacles added on to a dryer circuit is just not considered good electrical practice.Ĭonsider how you started your question "previous owner had taken the dryer's 220v circuit". Other than what has pointed out as code requirements. ![]()
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