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So, it is a “panel internal” wiring diagram. It does not show the external cables used to connect the control board and terminal cabinet to other external equipment. ... This is shown on the drawings as nU1TAA, terminals 1, 2, and 3 (phase 1, phase 2, and phase 3). nU2TAA terminal 6 is the neutral. ... (21) is the generator lockout relay ... ................
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