Ballast Output Voltage Chart
Ballast output voltage chart
The reading should be between 300 and 1000 volts depending on the ballast model. On Allanson's 696 and 4120, the readings should be taken between the blue/white and red as well as the blue/white and blue, because these are dual circuit ballasts. See the ballast label for specific Open Circuit Voltage rating.
How do you check ballast voltage?
Test the ballast's voltage with a multimeter. Attach the multimeter's leads to the sockets at the ends of the ballast. If the reading is not between five and nine volts, replace the ballast. Adjust the multimeter to measure frequency and replace the ballast if the reading is not between 20 and 50 kilohertz.
What is the output voltage of a T5 ballast?
Ballasts for T5 lamps are available for 120-, 277-, 240-, and 347-volt operations. Most T5 ballasts are more compact than T8 ballasts, although the dimensions vary depending on manufacturer and lamp type.
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