In Addition To Line Voltage Problems, The Reasons For The Heating Of Copper Terminal Blocks Are

If copper terminal block still overheats after confirming the line voltage is correct, the primary cause is usually poor wiring at copper distribution block or substandard quality at copper terminal strip. Poor wiring may include loose crimping, loose screws, oxidized contact surfaces, or improperly selected wire cross-sectional area. These can increase contact resistance and lead to overheating.