Copper ignition cables with interference suppression

Copper is an excellent conductor, but is also very sensitive to corrosion. Therefore, the copper core of such ignition cables is tin-plated. The tin layer protects the copper from oxidation.

The copper core is enclosed in a silicone shell  for increased stability and electrical insulation.

The outer insulation, made of silicone rubber, can withstand temperatures up to 220 °C and is resistant to gas and oil.

Ignition cables with a copper core are not equipped with their own interference suppression resistor. Instead, the resistor is integrated in the spark plug connector and coil connector in the form of a conductive glass seal. Depending on the cable it is between 1 and 6.5 kΩ.

 

Drawing - Copper ignition cables with interference suppression
Copper ignition cables with interference suppression are comprised of a copper core which is surrounded by a silicone casing which serves as an electrical insulator