WEBVTT

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A back-and-forth or inverter offers 2 positions for 2 circuits and 1 common

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Electricians also call them shuttles

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We will measure it in continuity

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The common back and forth to the tester COM

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Both positions are inverted

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Between the two circuits: no continuity. left and right simultaneously = impossible

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From the left side to the left inverter which creates 2 circuits

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The 2 'shuttles' are wired to the second inverter whose common goes to the lamp

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After the lamp, return to the generator (- here)

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It is possible to reverse the state of the lamp whatever its state and position

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Combination of 2 parallel circuits in series