Changes

: '''3-Core''' is referred to as [[Double Insulated|double insulted]] [[wire]] because each individual [[wire]] is covered in a layer of [[Plastic (Material)|plastic]] [[Electrical Insulator|insulator]] and the three [[wire]]s together are covered in another layer of [[Plastic (Material)|plastic]]. {| class="wikitable"|-|[[File:3CoreLabelled.png|center|400px]]|-| style="height:20px; width:200px; text-align:center;" |The three [[wire]]s in '''3-core''' are covered in different colour [[Electrical Insulator|insulators]] to identify the [[wire]]s.|}