This guide explores control panels, electrical boxes, breaker panels, bus bars, junction boxes, and custom enclosures to help you understand their sizes, types, and common applications. Used in industrial automation and process control. Houses PLCs, relays, contactors . Wieland is your experienced and reliable partner for efficient, pluggable and decentralized electrical installation. From power and signal distribution to I&C applications and complete room. Electrical control panels and distribution boxes are the backbone of modern electrical systems.