Read More. Did You Know? N1 Critical Technologies Inc. Parker Dr. Janesville, WI Contact Us. Your Shopping Cart will be saved and you'll be given a link. You, or anyone with the link, can use it to retrieve your Cart for up to 10 days. Send Cart in an Email Done! Empty cart. A lightning strike is about 20, amps. A watch may draw one-millionth of an amp. Household electrical cables typically are rated for 15 amps or 20 amps. A watt describes the rate of power flow.
When one amp flows through an electrical difference of one volt, its result is expressed in terms of watts. Think of watts not in terms of strength or capacity but speed or rate. The rate of flow of water through a garden hose or a vehicle's speed are good analogies for watts. The base unit ohm is the SI term indicating electrical resistance.
Ohm is a measurement of the resistance that a device or material placed within the electrical circuit resists or reduces the electrical flow. The Greek symbol for omega, resembling a downward horseshoe, is also the symbol that denotes ohms. Watts and volts are not independent of each other.
Watts cannot exist without volts since they are the product of a combination of volts and amps. In basic terms and using the hydraulic analogy, volts are similar to pressure and watts are similar to rate. Understanding the basic concept of rate is key to understanding watts vs.
Speaking to a friend about traveling, one could say that the vehicle covered 65 miles. While this is useful information, it doesn't give a full picture of exactly what just happened. You may have said that you drove 65 miles, but what's the greater context of this?
Did you drive it in about one hour? That's normal and expected. If you drove it in three months, that's a completely different thing. This is where time comes into play. Time by itself, too, is incomplete data. If you told the friend that you drove for ten hours, the friend might follow up by asking where you drove or how far you drove. Mathematically, real power watts is related to apparent power VA using a numerical ratio referred to as the power factor PF , which is expressed in decimal format and always carries a value between 0 and 1.
For many newer types of IT equipment, such as computer servers, the typical PF is 0. For legacy personal computers PCs , this value can be 0. Using one of the following formulas, a calculation can be made to determine the missing quantity:. Single phase: Multiply amps by voltage volts in the U.
Three phase: Amps x volts x 1. In simple terms, imagine UPS power capacity as the amount of soda in a glass.
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