v = volts a = alternating c = current vac is what the lights and appliances in your house use. Your TV uses 120VAC and your dryer or electric stove uses 240vac. 120vac is the accepted standard of electric current commonly used through out the U>S>. Vac speaks of ac or alternating current voltage. 240 volts is simply twice that amount. Electric lights, lighter appliances mostly use 120 volts to energize them but heavier duty appliances such as dryers required more voltage as they use more energy. Vac or alternating current as oppose to DC(Direct current )which is normally used on boats, ships, etc.
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Oh, dude, you're asking about voltages now? Alright, so 120VAC and 240VAC are just fancy ways of saying how much power your electrical outlets can handle. The "VAC" stands for volts alternating current, which is basically the juice flowing through your wires. So, if you're plugging in something that needs 240VAC, just make sure your outlet can handle the power or you might end up with a shocking experience...literally.
"120VAC" and "240VAC" refer to the voltage of an alternating current (AC) electrical system. The "V" stands for volts, which is the unit of measurement for electrical potential difference. The numbers 120 and 240 indicate the voltage level of the electrical supply in volts. For example, in North America, standard household outlets are typically 120VAC, while larger appliances like stoves or dryers may require 240VAC for operation.
Well, hello there, friend! 120VAC and 240VAC are terms used to describe the voltage of electrical power in your home. The "V" stands for volts, which is a measure of electrical pressure. The "AC" means alternating current, the type of electricity that flows back and forth in a circuit. It's important to know the voltage so you can safely use your electrical devices and keep on creating those happy little sparks of creativity!
Most homes have a 240 volt supply that is center-tapped at the distribution transformer. The center tap is neutral and is also grounded. Each leg is hot. The voltage from neutral to either leg is 120 volts. The voltage between legs is 240 volts. Each leg, measured to neutral, is 180 degrees out of phase with respect to each other. This is still considered single-phase power. Sometimes, the term split-phase is used. Do not call it two phase, or partial three phase, because the phase angle is 180 degrees instead of 120 degrees. The advantage of 120 / 240 power is that you can connect normal loads (such as lights) from neutral to hot, and run them on 120 volts, while connecting larger loads (such as clothes dryers and ranges) from hot to hot, and run them on 240 volts. In an ideal configuration, the current on one leg is balanced to the current on the other leg. This results in zero or near zero current on neutral, and allows the distribution transformer to operate more efficiently.
If it says 120/240 or 120-240 VAC or something similar then the indication is that it can operate at either voltage. There maybe a requirement to install or remove jumpers or a rewiring may be required. Check the manual.
120 VAC means 120 Volts Alternative Current. You may also find VDC which mean Volts Direct Current
Ummm yes ? If your talking about a wall outlet yes you can have 120v dc but not at an outlet
240 volts alternating current (240vac)
you need a step up transformer
If you are referring to the 25KW Power Distribution Panel used by the military, NSN: 6110-01-244-3209, there are four 120VAC, 20A circuit breakers and four corresponding twist lock receptacles.
The power supply converts the high voltage (e.g. 120VAC in US, 240VAC in Europe) alternating current house electricity supply down to the various different low voltage direct current supplies needed by different devices that make up the computer. These low voltage direct current supplies are tightly regulated in the power supply circuitry to prevent transients in the house electric supply from perturbing the computer's electronics as well as to compensate for variations in power demand as the different devices that make up the computer operate.
In theory, you can. If you have a power transformer rated at 480 primary side and the secondary at say 120VAC, then the ratio is 4:1. Meaning that there are four times the number of turns on the primary side as to the secondary. So, if you were to power the primary side with 120VAC as opposed to 480VAC you would expect to see a 1/4 reduction in voltage output on the secondary, or 30VAC. The current would be dependant on the cross section of the secondary conductor and core construction. As current is increased thru the load (as in resistance welding) for example, you would expect voltage to decrease or lag, a larger Industrial sized transformer is able to compensate for this lag in voltage better than a compact household power transformer.