A spark plug has a metal threaded shell, electrically isolated from a central electrode by a porcelain insulator. The central electrode, which may contain a resistor, is connected by a heavily insulated wire to the output terminal of an ignition coil or magneto.
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January 16th, 2017 by Tina Casey. The Department of Energy has just released a report that anticipates the addition of 198,000 new jobs in the energy efficiency sector for 2017. Based on his behavior before taking office, itâs a safe bet that US President-elect Donald Trump will not let the good news go unremarked upon. The PEOTUS has already credited himself with bringing thousands of new jobs to the US employment landscape since Election Day, so whatâs a few thousand more?