Electric Nameplates Electric Nameplates
Some appliances use more energy than others to accomplish the same task. Appliances that are very energy efficient are approved by the government’s ENERGY STAR® program and have the ENERGY STAR® label on them. This means they have met high standards set Some appliances use more energy than others to the same task. Appliances that are very energy efficient are approved by the by the government foraccomplish energy efficiency.
government’s ENERGY STAR® program and have the ENERGY STAR® label on them. This means they have met high standards set by the
government for energy Every machine that efficiency. runs on electricity has an electric nameplate on it. The nameplate is usually a silver sticker that looks likeonthe picture The nameplate hasnameplate information about thesticker amount of electricity the Every machine that runs electricity hasbelow. an electric nameplate on it. The is usually a silver that looks like the picture machine uses. Sometimes, the current is listed. The current is measured in amperes (A). Sometimes, the below. The nameplate has information about the amount of electricity the machine uses. Sometimes, the current is listed. The current is voltage the machine is listed. Thethe voltage isneeds listed in volts (V). Sometimes, the is the listed. Theis measured in amperes (A).needs Sometimes, the voltage machine is listed. The voltage is listed in volts (V).wattage Sometimes, wattage wattage is measured in watts (W). If the wattage isn’t listed, then the current and voltage are both listed. listed. The wattage is measured in watts (W). If the wattage isn’t listed, then the current and voltage are both listed. the wattage is not listed, you can the wattage using the following IfIfthe wattage isn’t listed, youcalculate can calculate the wattage usingformula: the following formula, like this:
wattage
=
current x voltage
wattage
W
=
=
A
W W
=
=
1.0A
W W
=
=
5W1.0A
x
current A x
V
x voltage x 5V V x
5V
Often, the letters UL stands for W UL are on = the nameplate. 5W Underwriters Laboratories, Inc., which conducts tests on thousands of machines and appliances. The UL mark means that samples of the machines and appliances have been tested to make sure they are safe. You can find out how much it costs to operate any appliance or machine if you knowUL the are wattage. Let’snameplate. take a look atUL some of Often, the letters on the stands for Underwriters Laboratories, Inc., which conducts the machines in your school. The nameplate is usually located tests on thousands of machines and appliances. The UL mark means that samples of the machines and on the bottom or back. Seetested if you can the sure nameplates on the appliances have been to find make they are safe. computers, printers, monitors, televisions, and other machines in
yourcan classroom. Puthow the information in the to chart below and You find out much it costs operate anyfigure appliance or machine if you know the wattage. Take a look the wattage each one. in your school. The nameplate is usually located on the bottom or back. See if you atoutsome of theformachines can find the nameplates on the computers, printers, monitors, televisions, and other machines in your classroom. Put the information in the chart below and figure out the wattage for each one.
MACHINE OR APPLIANCE
70 ©2009
CURRENT
VOLTAGE
Machine Copier
Current 11A
Voltage 115V
C o p ie r
�� A
��� V
WATTAGE
UL TESTED
Wattage 1,265W
ULyestested
�,� � � W
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