Inspect control wiring, relays, power supply units, timers, etc. Verify control circuit fuse rating and continuity. Check and torque test bolted electrical connections as necessary to specified levels. Hey there! Ever wondered what keeps our lights on and gadgets running smoothly without a hiccup? It's all thanks to the unsung heroes of the. Open the distribution box and check for dust and debris accumulation. Look for any signs of burnt or damaged wiring. Testing Test the grounding system. A structured electrical panel and power distribution maintenance program is the most direct way to prevent that outcome: the 2023 NFPA 70B standard has now made annual infrared thermography inspections of all electrical equipment mandatory, shifting electrical maintenance from a recommended. Low-voltage intrusive switchboards regulate and distribute power in buildings and facilities. LV intrusive switchboards accept power from the utility & generator & distribute it to building circuits. Multiple circuit breakers or fuses safeguard. A power distribution board (PDB), also known as a distribution panel or electrical panel, is a critical component in any electrical system. 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.