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10 Steps to Control Electrical Cabinet Problems

Beware of interference when control and power circuits reside in one cabinet.

By Randy Barnett, Energy Auditor, Step1 Energy Audit

Mixing 480V three-phase cables and lower voltage 24- or 120V control wiring and communication cabling in the same cabinet can result in erratic operation or even complete failure of electronic equipment inside the cabinet. Knowing what’s inside the cabinet before you open it, the specific wiring variables to look for once inside, what values to measure, and simple ways to correct problems can help alleviate many erratic and sometimes mysterious control and communication problems.

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