LED lighting has become increasingly popular in recent years due to its energy efficiency and long-lasting lifespan. T5 LED lamps are a popular choice for retrofitting existing fluorescent fixtures as they offer a similar level of brightness and color temperature, but use less energy and last longer. However, to install T5 LED lamps, you will need to bypass the ballast in your fixture. In this article, we will provide a detailed wiring diagram and guide for bypassing the ballast in your T5 fluorescent fixture.
Why Bypass the Ballast?
The ballast in a fluorescent fixture is responsible for regulating the current flowing through the lamp. However, it also consumes a significant amount of energy, which defeats the purpose of upgrading to LED lighting. By bypassing the ballast, you can eliminate this energy consumption and increase the lifespan of your new LED lamps. Additionally, bypassing the ballast can improve the overall efficiency and performance of your lighting system.
Tools and Materials
Before you begin, make sure you have the necessary tools and materials:
| Tools | Materials |
|---|---|
| Wire strippers | T5 LED lamps |
| Wire connectors | Non-shunted tombstones |
| Screwdrivers | Electrical tape |
| Wire nuts | Wire |
Step-by-Step Guide
Step 1: Turn Off Power
Before starting any electrical work, always turn off power to the fixture at the circuit breaker. Use a voltage tester to confirm that the power is off before proceeding.
Step 2: Remove the Ballast Cover
Remove the cover on the ballast compartment of the fixture. Most covers are held in place by screws, but some may be held in place by spring clips or other mechanisms.
Step 3: Disconnect the Ballast
Disconnect the wires from the ballast. You may need to make note of which wires were connected to which terminals for reference later. Ballasts typically have two wires going to each lamp, as well as a ground wire.
Step 4: Remove the Ballast
Remove the ballast from the fixture. Depending on the fixture design, you may need to remove screws or other fasteners to release the ballast from its mount.
Step 5: Wire the Tombstones
Install non-shunted tombstones in the fixture. These tombstones will serve as the new lamp holders for the T5 LED lamps. Follow the wiring diagram below to connect the tombstones to the wiring in the fixture:
Step 6: Install the LED Lamps
Install T5 LED lamps in the fixture. Be sure to check the manufacturer’s instructions for specific installation requirements and any necessary precautions.
Step 7: Tuck Wires and Replace Cover
Tuck any excess wires into the fixture, and replace the cover over the ballast compartment. Make sure all screws or clips are securely fastened.
Step 8: Restore Power and Test
Turn the power back on at the circuit breaker, and test the fixture to ensure that the LED lamps are working correctly.
Frequently Asked Questions
Can I install T5 LED lamps without bypassing the ballast?
No, T5 LED lamps require a direct connection to the incoming power source. Bypassing the ballast is necessary to achieve this.
Can I use the existing wiring in my fixture?
Yes, you can use the existing wiring in your fixture as long as it is in good condition and rated for the voltage and current of the LED lamps.
Do I need to modify my fixture to install T5 LED lamps?
No, T5 LED lamps are designed to be a direct replacement for T5 fluorescent lamps. Simply bypassing the ballast and installing the new lamps should be sufficient.
Do I need to use a specific type of tombstone with T5 LED lamps?
Yes, you will need to use non-shunted tombstones, which have separate connections for line and neutral wires. This is necessary to provide a direct connection to the incoming power source.
Can I use T5 LED lamps with a dimmer switch?
Yes, but you will need to use LED-compatible dimmer switches, which are designed to work with the unique electrical properties of LED lighting. Consult with the manufacturer of your lamps and dimmer switch for specific compatibility requirements.
