"Electrical circuits" refers to a system of interconnected pathways that allow electricity to flow through them. It is like a network of roads that electricity travels on to power devices and machines. Full definition
For example, if we used the analogy of electrical circuits, we would find cables, plugs, switches, etc.. (sciencedaily.com)
The team developed a technique for exploring electrical circuits using these brain scans, and found that after intensive training specific brain connections involved in memory and attention were changed. (sciencedaily.com)
Ability to use appropriate tools and diagnostic equipment to repair, install, replace and test electrical circuits, equipment and appliances. (jeffthecareercoach.com)