Department of Public Service

Measuring Energy

AMPERE (amp)
      Unit of electric current based on the number of electrons flowing through a conductor per second. 
      Basic measurement of the heat content of natural gas. One therm equals 100,000 BTUs, the heat content of just under 100 cubic feet. A Decathem equals ten therms or 1 million BTUs. 
      Basic measurement of energy. One BTU is required to increase the temperature of one pound of water one degree Fahrenheit. 
      A measure of the force that moves electricity similar to water pressure in pounds per square inch. Extra high voltage (EHV)is any quantity over 345,000 volts. Ultra high voltage (UHV)is referred to any amount in excess of 800,000 volts. 
      Unit used to measure the volume of gas. It is the amount of gas needed to fill a volume of one cubic foot under set conditions of temperature, pressure and water vapor. One cubic foot of gas generally contains 1,000 BTUs. Amounts of cubic feet may be multiplied by Ccf, C for 100, Mcf, M for 1,000 or MMcf, MM for one million. 
      A measure of the rate of energy to do work. A watt may be compared to the horsepower of mechanical energy. 
      A formula used to track the daily outdoor average temperature with 65 degrees Fahrenheit as a benchmark. One degree day is counted for every degree falling below this benchmark on a calendar day. 
      An amount of energy used to continuously supply power to an electric circuit for one hour. For example, a lamp rated at 100 watts that was on for 3 hours would consume 300 watt hours of energy.. 
      Prefixes used to identify various electric measurements for thousand, million and billion volts or watts (kV, mV, kW). 

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