Editing Spark plug (section)

====Side (ground, earth) electrode====
The side electrode (also known as the "ground strap") is made from high nickel [[steel]] and is welded or hot forged to the side of the metal shell. The side electrode also runs very hot, especially on projected nose plugs. Some designs have provided a copper core to this electrode, so as to increase heat conduction. Multiple side electrodes may also be used, so that they don't overlap the central electrode.  The ground electrode can also have small pads of platinum or even iridium added to them in order to increase service life.<ref>For example, notice the 2015-2016 Champion master catalog from Europe's type chart, which flips out from the back.  In many cases, depending on the design, "platinum" is listed as the metal type.</ref>