Hammond 270FX Primary wires ?

[worth]

I just received this PT.. it's got three primary wires , white , black , and grey. What IS the grey wire ? It's not really clear on the wiring diagram ?

[HotBluePlates]

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Apparently, Hammond made a change to their PT's in 2009, but they still haven't updated the diagrams on their boxes. I got a Hammond PT a few months ago, with the same lack of indication on the diagram for the gray wire.

I suggest using the 125v wiring (white, black wires) to avoid the too-high voltage that used to be common with Hammond PT's.

[sluckey]

Use white and grey if your line voltage is 115VAC. Use white and black if your line voltage is more like 125VAC.