Miswired 120v Electrical Noise Filters causes Breaker to Trip

1 min read·Updated Aug 2026
Applies toAll machinesTopicTroubleshooting

Preface: This article covers the scenario where there are miswired Electrical Noise Filters that cause the Main Circuit Breaker to trip.

Proper Wiring

Proper wiring diagram for 120V electrical noise filters

Example of Improper Wiring

Incorrect wiring on the left, correct wiring on the right. In this case, for the left side filter, the Ground yellow/green wire should be on the lead tab and not the brown wire.

Comparison of incorrect wiring on the left and correct wiring on the right

How To Fix

Power off the 2 machine switches and unplug the machine from wall power. Then swap the wiring to match the filters as shown in the Proper Wiring section.

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