Question: What is the blue wires on a nPP16 D and how do I connect it.

Answer:The blue wires on the nPP16 D are the relay contacts for the line voltage. Tie one of the blue wires to the black(120) or the orange(277) wire depending on whether you use 120/277 VAC, capping off the other. Tie the second blue wire to the load you are controlling with the nPP16 D.

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