To ensure long-term reliable operation of the DC Molded Case Circuit Breaker, follow strict maintenance protocols: Before work, disconnect power and verify de-energization while wearing insulated gear. Inspect the housing for cracks or damage in dry conditions; tighten terminals to manufacturer specs with a torque wrench. Operate the handle 5+ times to verify smooth switching and trip reset. Check the non-polar wiring connections to ensure they are secure. Clean the device with dry tools to remove dust and debris. Maintain annually under normal conditions or every 6 months in humid or dusty environments, with immediate checks after faults. Record all maintenance data for future reference.