Electrical101 Background

Mobile Site        Sitemap        Copyright © 2017 Electrical101.com        All Rights Reserved         Terms of Use

Sitemap Electrical101

Switches | Outlets & Plugs | Ballasts | Replace Ballasts | Troubleshooting | Light Bulbs | Basic Electricity | Save Energy | Misc

Question or Comment?

After 3 Lamp Ballast is Replaced

Replace 3 Lamp Parallel Ballast with 4 Lamp Parallel  Ballast Wiring Diagram

Replace 3 Lamp Parallel Ballast with 4 Lamp Parallel  Ballast Wiring Diagram

How to Replace 3 Lamp Parallel Ballast

Replacing a ballast of the same type (3 lamp with 3 lamp, parallel with parallel) is fairly simple. The wiring connections and colors match up.

3 Lamp Parallel Ballast

Factory wiring

After 3 Lamp Ballast is Replaced

Replace 3 Lamp Parallel Ballast with 4 Lamp Parallel  Ballast

In this example, a fixture with a 3 lamp parallel ballast is replaced with a 4 lamp parallel ballast. The colors of the old and new ballasts do not match. This replacement can be difficult to do unless a person totally understands how this wiring works.

A 3 lamp parallel ballast can be replaced with a 4 lamp parallel ballast. The two yellow wires on a 4 lamp ballast are connected together inside the ballast.

  1. Cut and cap one yellow and one red or blue wire with a wire nut.
  2. Connect each of the blue ballast wires to the each of the two blue lampholder wires.
  3. Connect the red ballast wire to the third blue lampholder wire.
  4. Connect the yellow ballast wire to the red lampholder wire.
3 Lamp Parallel Ballast Lampholder Wiring Diagram

Replace

Ballasts

Replace 1

Lamp Series Ballast with 2 lamp Parallel

Replace 1 Lamp Series Ballast with 2 Lamp Series

Replace 2

Lamp Parallel Ballast

Replace 2

Lamp Series Ballast with Parallel

Replace 2

Lamp Series Ballast with Parallel 2

Replace 2

Lamp Series Ballast with Series

Replace 3

Lamp Parallel Ballast

Replace 3 Lamp Two Parallel Ballasts with Parallel

Replace 3

Lamp Series Ballast with Parallel

Replace 3 Lamp Two Series Ballasts with Parallel

Replace 3

Lamp Series-Parallel

Ballast with Parallel

Replace 3

Lamp Series-Parallel

Ballast with Parallel 2

Replace 3

Lamp Series-Parallel

Ballast with Series

Replace 4

Lamp Parallel Ballast

Replace 4 Lamp Two Series Ballasts with Parallel

Replace 4

Lamp Series Ballast with Parallel

Direct-Wire Dual-Ended

LED Tube

Lights

Direct-Wire Single-Ended LED Tube

Lights