A circuit which has no direct connection to primary power and derives its power from a transformer, converter or equivalent isolation device, or from a battery.
The lower-voltage system of Circuits and equipment that connects to the Distribution Circuit on the low-voltage side of the Transformer between the Distribution Line and customer.
The high voltage side of the ignition system, usually above 20,000 volts. The secondary includes the ignition coil, coil wire, distributor cap and rotor, spark plug wires and spark plugs.