Feeder sizing, busbars, wire numbering, IEC/UL 508A compliance, heat dissipation, DIN rail layouts.
What is the standard practice for maximum wire fill ratio in slotted PVC wire ducts inside PLC control panels? Does IEC 60204-1 enforce a strict 40% cross-sectional area limit for thermal dissipation, or is 50% acceptable if low voltage 24VDC control wires are kept separate from 415V 3-phase power wiring?