How to Install a Capacitor (with Pictures) - wikiHow MethodTipsWarningsThings Needed Understand the basic idea of a capacitor. The capacitor acts as a storage tank for electrical power. The amount of power that the capacitor can store is measured in Farads and the general rule of thumb is that you will need one Farad of capacitance for every one kilowatt (or 1,000 Watts) of power demand in your system.Decide whether or not you want an internal meter. Some capacitors come with built in meters that diSee all 3 steps on wwwhow100%(1)Published: Jun 12, 2011Views: 219K Diagram for Wiring 1 Capacitor to 2 Amps? - the12volt GROUND from cap to clean/bare metal on chassis. Ground your other amps as the SAME spot on chassis. 12v comming from battery, place DISTRIBUTION BLOCK and run 2 12v wires from it. One goes to 12v in for the CAP and the other wire from DISTRIBUTION BLOCK goes to the SUB AMP.