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Replace 2 Lamp Series Ballast with Parallel Wiring Diagrams 2

How to Replace 2 Lamp Series Ballast with Parallel 2

Factory wiring example 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

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Replace 4 Lamp Parallel Ballast

Replace 2 Lamp Series with Parallel Ballast

Replace 2 Lamp Series with Parallel Ballast 2

Replace 1 Lamp Series with 2 Lamp Parallel Ballast

Replace Two 2 Lamp Series with Parallel Ballast

Replace 3 Lamp Series Ballast with Parallel

Replace 4 Lamp Series with Parallel Ballast

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