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Spark plug wires

Four spark plug wires (distributor end on the right, spark plug end on the left)

Spark plug wires (also called high tension leads) are electrical cables used by older internal combustion engines to transmit high-voltage electricity from the distributor to the spark plugs . Tension in this instance is a synonym for voltage. High tension may also be referred to as HT.[1]

Many modern engines use coil-on-plug ignition, a design that does not use spark plug wires.

  1. ^ ITA, Angelo Raffaele Braia, "Engine system 4.0: system for the internet of things applied to the automotive industry", assigned to Brecav S.r.l. 

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