Customer question: How do I estimate circuits and power capacity for an older LED screen?
English explanation
Use the factory maximum power for final electrical design and distinguish it from average operating power. A used display may have changed power supplies, brightness settings or cabinet batches, so an old estimate should be checked against the actual nameplate and test condition. For planning, screen area multiplied by factory power per square metre can provide an estimate. Current then depends on voltage and the power arrangement, but a qualified electrician must approve the circuit. Draw the power tree: main distribution, zone circuits, cabinet groups, cable lengths, protection and phase allocation. Review voltage, frequency, cable size, connector rating, ambient temperature, generator capacity and shared loads. Do not copy the circuit count from a 220 V project to a 110 V site. Do not assume that one 16 A outlet can carry a fixed number of cabinets without the exact maximum power and installation conditions. Commission by zone. Inspect labels and connectors with power isolated, then energize one circuit at a time and record supply, protection, start-up result and abnormal heat. Run white and high-brightness content only within the approved test boundary. Repeatedly resetting a breaker is not troubleshooting.
Service boundary
Distribution-panel work, circuit changes, grounding and live measurement require a qualified electrician and local-code approval. —
