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Cascade Controlled
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The oil switch for this constant current regulator is controlled by another 6.6 amp series lighting circuit. Note how the break insulator on the far right of the second arm down splits the line and the heavy insulated wires run in the tube under the arm to the switch. Instead of a PC operating a 120 volt coil in the oil switch, the coil is made for 6.6 amp series.
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