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What is the difference between DC and AC?

Source: http://www.dlheater.com Author: admin Time: 2014.12.15

When inquiring about heating element, most customers would like to specify the power either AC or DC. Then how much volt is within AC or DC? What’s the difference between AC and DC?

First of all, it must be known that AC and DC are referred to current. AC is short of alternating current while DC is that of direct current.

In alternating current (AC), the flow of electric charge periodically reverses direction. AC is the form in which electric power is delivered to businesses and residences. AC has a wide use in family life and industrial production. Residential voltage is usually 200-240v, while industrial voltage is 380v or higher. All AC volts is hazardous.

Direct current (DC) is the unidirectional flow of electric charge. Direct current is produced by sources such as batteries, thermocouples, solar cells, and commutator-type electric machines of the dynamo type. Direct current may be obtained from an alternating current supply by use of a current-switching arrangement called a rectifier, which contains electronic elements or electromechanical elements that allow current to flow only in one direction. Direct current may be made into alternating current with an inverter or a motor-generator set. DC is widely used in small electrical appliances, such as flashlight (battery), mobile phone (lithium battery), etc. Volt that is lower than 98v is DC, which is safe. But some think that 110-120v is DC as well.

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