Patch leads are used to connect devices and equipment to the cabling system. In modern electrical systems, cable distribution boxes (also known as electrical distribution boxes or distribution boxes) play a crucial role as the key hub for managing, distributing, and protecting circuits. Whether it is residential buildings, commercial facilities or industrial sites, the. In this electrical DIY guide i will be showing you how to extend short cable. I will take you through step by step, showing you how to splice cables the easy way. It takes the incoming power and safely distributes it to different circuits throughout your building. All cables terminate onto a patch panel at the common point.