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How to Replace 4 Lamp Two Series Ballasts with Parallel

4 Lamp Two Series Ballasts

Factory wiring

After 4 Lamp Two Series Ballasts is Replaced

4 Lamp Series to 4 Lamp Parallel Ballast Lampholder Wiring Diagram


Light Fixtures with Two Ballasts

A 4 lamp fixture with two series ballasts can be replaced with a 4 lamp parallel ballast. As seen below, connecting the 4 lamp parallel ballast to the four lamps can be a bit confusing. This is because the wire colors on the ballast and the lampholders do not match up on two of the connections.

  1. On the 4 lamp parallel ballast diagram below, each individual wire is connected to a pair of individual wires on the lampholders. Two individual wires of the same color (blue or red) connect to each of the individual pairs on lamps 1 and 4. The other two individual wires of the same color (blue or red) connect to each of the individual pairs on lamps 2 and 3.
  2. One of the yellow common wires connect to the common wires of lamps 1 and 4. The other yellow common wire connects to the common wires of lamps 2 and 3.
Two 2 Lamp Series Lampholder Ballast Wiring Diagram

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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

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Direct-Wire Single-Ended LED Tube

Lights