Electrical Preventive Maintenance Checklist: Industrial and Commercial Establishment

Checklist:

• Check all power meters for regular function before shutting them down for maintenance.

• Confirm that indicators, sensors, and warning lights are functioning correctly.

• Torque test and inspect bolted electrical connections to specified levels whenever needed.

• Visually inspect primary control points for signs of deterioration and overheating.

• Disassemble battery tripping packs and check for signs of general battery integrity and any signs of corrosion or heat damage.

• Perform thermal imaging surveys using precise thermography equipment.

• Check for signs of persistent overheating and single out specific areas for repair or part replacement.

• Inspect motor control circuits and check for appropriate overcurrent protection.

• Confirm that all motor disconnects are close to the motors and are easily accessible for maintenance.

• Check if multi-unit conductors are properly supplying to all connected units and if they are rated for their connections.

• Verify that ground-fault and feeder short-circuit protection is sized according to the specific application.

• Confirm if the transformers rated at over 1,000 volts have adequate overcurrent protection (install protection if necessary)

• Inspect transformers for any failsafe elements or means of disconnecting immediately.

• Conduct a detailed survey of all machinery and moving systems (elevators, dumbwaiters, and platform lifts), check for proper wiring, and ensure correct voltage supply.