Then use a nut driver to unscrew the nut holding the ballast in place and install the replacement ballast.
Fluorescent light ballast replacement.
Unplug the fixture or turn off the power at the main panel.
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To safely replace the ballast in your fluorescent light turn off the lamp remove it and check the voltage of the feed wires with a voltmeter.
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T12 fluorescent light ballast replacement.
Screw in the new ballast replace the metal cover install the fluorescent bulbs and replace the light cover.
The attachment method.
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Centium 49 54 watt 120 277 volt 1 or 2 lamp t5ho programmed start electronic fluorescent replacement ballast model 502211 36 78 36 78.
Replace the ballast when your fluorescent light flickers or makes an annoying hum.
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T12 fluorescent light ballast replacement.
These ballasts are available in either instant start or programmed start ignition for extended lamp life in frequent switching applications such as those where occupancy sensors or motion detectors are being used.
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Keystone 2 bulb commercial electronic fluorescent light ballast.
Remove the fluorescent ballast compartment cover to expose the internal wiring and ballast.