Micromanagers, super-thrifters, these type of people want to squeeze every resource for what it's worth. They do this for a variety of reasons, though I expect largely because of control issues. But these type of people need to look closely at the power cables of their devices. If they did, they might notice they always have more length from the cable than they need. One could measure the precise distance -- define a precise amount of slack -- for each device and each device's power cable. But why? No, buy a lamp cord that's too long; let the slack hang. Waste the resources. I bet the light will still turn on.