Spark Plug

When the power supply cable got sparked, it gets burnt or caches fire then explain why the spark plug in our automobiles never get burnt or catch fire even it spark's?
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maxandrean

  • Jul 5th, 2010
 

The insulation of spark plug wire is designed to stand over the voltage apllied to. The breakdown voltage of this insulation is much higher than the operating voltage applied to the spark plug.

ravs42

  • Aug 6th, 2010
 

Generally in automobiles we have an alternator that produces ample AC supply that is converted to 12V DC supply via the help of rectifiers and regulated IC usage. The 12V is then feed to the batterries for recharging. 12V is applied to the ignition coil that is capable to generate 20000V, potential difference across it which is apt for creating a spark for a very short duration nn enough 4 starting the engine.
Since spark generation is of very short moment it doesn't catches fires and also additional insulation adds to the protection mechanism.

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