Power is the product of voltage x current (P = VI). For any given amount of power, a low voltage requires a higher current, thus requiring a larger size conductor (P = I2R) to transfer it from one place to another. Therefore it is more economical to transfer power using high voltage, thus requiring a smaller diameter cable.

Large offshore wind farms over 100 MW generally use HVDC (High Voltage Direct Current) because DC technology : DC emits about 5% of the electromagnetic radiation of AC which is good for elasmobranchs (sharks etc) See similar questions...

Yes, Solar Systems are very versatile and can be designed for both DC and AC Appliances. You also have the option of converting them at a later date. See similar questions...

Also known as battery eliminator, universal AC adapters are used to convert AC electricity (i.e. 120V or 240V) to a desirable DC current (i.e. 1.5,3,4.5,6,7.5,9 or 12 Volt DC). Some battery operated items with DC input includes walkmans, baby monitors, telephones which can be used with AC adapters universally. See similar questions...

If you want a long lasting and more powerful, professional quality dryer, buy an AC motor dryer. A dryer with a DC motor is usually lighter and less expensive, however it will need to be replaced more frequently. DC dryers are best suited for at home use. See similar questions...

At the turn of the century, there was differing opinion (especially between Thomas Edison and George Westinghouse) on whether electricity should be transmitted as alternating current (AC) or direct current (DC). This debate is commonly known as the "War of the Currents". AC had the advantage of being converted via transformers to higher voltages which, at the time, allowed electricity to be transmitted over long distances at lower losses. See similar questions...

Underwater cables will transport the electricity from the turbines to a transformer located onshore. This will convert the voltage for transmission through the national grid through the local grid connection. You can see this in a diagram here. See similar questions...

All Watchdog systems will switch to DC battery power when the AC power is out, or when the main pump fails. But if the power is on, the AC/DC Big Dog can pump directly off of the AC wall current without depleting the battery. The other systems will only pump off of battery power. See similar questions...

With DC (Direct current), the current always flows in one direction with no relation to change in time, as is the case with a dry cell battery or a car battery. (The DC output of Honda generators is for charging batteries only.) Alternating current, on the other hand, reverses its direction at uniform time intervals. Almost all-household electrical appliances are made to run on alternating current. Well, let’s use an example to illustrate why. See similar questions...

Both AC and AC/DC welders have a large transformer in them that converts the power from the wall outlet to a voltage that is proper for welding. AC welders simply convert the outlet AC voltage - DC welders convert the voltage AND change the AC from the wall outlet to DC. When the electricity is changed to DC, it has a polarity associated with it. AC (alternating current) power has no specific direction - it cycles back and forth 60 times a second (alternates). See similar questions...

Yes, both AC power source or dry batteries can be used on our Techwinder. So you could use it anywhere in your home or office or store, or place it inside your safe or vault to safe guard your watch collection while winding your watch at the same time. See similar questions...

Most of the countries use alternating currents (AC). DC stands for direct currents. All appliences and voltage transformers run only on AC electricity. There is no worldwide standards for the plug configuration. Plugs, plug shapes, electric outlets differ from country to country. For that reason you need to get a plug adapter, in order to plug your aplliance into foreign electric outlet. You still need a voltage converter, otherwise you might demage your applience or cause fire! See similar questions...

Probably not, all countries use different standards for voltages, etc. We have special overseas adapters available for $20 extra. Yes. The Touchscreen has been specially treated to resist finger prints and make the touch surface - oil and dirt resistant. In order to do so, it does reflect some light and can be adjusted by tilting the screen or adjusting it so that lights are not directly behind the user. See similar questions...

Search our FAQ for information about Associated Content, including signing up, submitting content, making money, managing your account and partnering with AC. Tip: Type "CTRL" + "F" to search for a keyword related to your question. (Example: If you have a question about submitting a video, search for the word video.) See similar questions...

The main MARS node receives 10 kilowatts (kW) of power from shore at 10,000 volts. The node converts this to 375 volts DC (VDC) and 48 VDC for science use. A total of 9 kW can be distributed as needed to the eight science ports. Up to 1 kW of the 9 kW total can be distributed to the 8 science ports at 48 VDC. See similar questions...

Yes, the halogen lamp doesn't differentiate between whether the power source is AC or DC, as long as the potential is 120 Volts. However, when the lamp fails, the filament will break and may draw an arc. You need to fuse properly for this event. See similar questions...

Today [3/05] while the the Mumbai area is still mostly at 1.5kV DC, there are a couple of important AC-DC transition points such as Igatpuri -- [2/06] now Kasara -- and Virar. In time, when 25kV AC becomes the norm and DC traction is decommissioned, these transitions will be history and there will be no more traction changeovers! Sad for railfans, but perhaps more efficient for IR. Already, CR has recently [2/06] switched the Kasara - Igatpuri section to 25kV AC. See similar questions...

Opus Solutions, Inc. DC-DC supplies are over 90% efficient. Using an AC inverter paired with a regular PSU to power your vehicle based computer system can be as low as 50% efficient - placing extra load on your car's electrical system. Inverters can also create a lot of electrical 'noise' which can seriously effect the performance of your equipment.[ Back to Top ] See similar questions...

There are several ways that it can be done; you have to make sure that you abide by your county building codes. Our contractors bore holes on site to run the wiring. The electrician bores the holes in the logs and runs the wiring from underneath the crawl space. If homeowner builds house the holes are bored in the first two courses of logs as they are put together. Switch plates are run through door facings. See similar questions...