Most electrical failures inside distribution panels do not start with overloads or short circuits—they start with connectors that were “installed once and forgotten. ” This article provides a practical, field-proven connector inspection checklist designed for E-abel distribution panels. It covers clear access and housekeeping, panel integrity and corrosion, proper mounting and canopy protection, junction box condition, covered switches and displays, and. To ensure that the electrical testing & pre-commissioning of the control, distribution, and miscellaneous panel are carried out in a manner that is risk-free, productive, and in accordance with good working practice, as required by the project work specifications. Check Enclosure as per Area Classification Step 4. Junction Box Properly Mounted and Supported Step 5. Inspect for any physical damage to the enclosure. Ensure that all labels and warning signs are legible. Internal Inspection Open. A preventive maintenance checklist for electrical distribution systems in commercial buildings typically includes various tasks and inspections to ensure the system's safety and reliability such as: Check for any signs of damage, wear, or overheating in electrical panels, switchgear, transformers.