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2 Lamp Series Ballast

Factory wiring

How to Replace 2 Lamp Series Ballast with Parallel 2

These diagrams show a variation of 2 lamp series ballast wiring one of our readers encountered.

A 2 lamp series magnetic ballast should be replaced with a 2 lamp T8 parallel electronic ballast. Each lampholder has four separate connections.

  1. Connect each of the individual blue wires from the parallel ballast to each pair of the lampholder individual wires (red and blue).
  2. Connect the common red wire from the parallel ballast to the yellow, blue, and red wires of the common lampholders. A blue wire connector can be used to connect these four 18 AWG wires together. However, a larger orange wire connector would be a better choice if available.
Replace 2 Lamp Series with Parallel Ballast Wiring Diagram 2

After 2 Lamp Series Ballast is Replaced

Swap Terminals on Non-Shunted Lampholders 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