Plug assemblies and related kits and techniques for using the same are disclosed herein. In one non-limiting aspect, a plug assembly protects an existing plug of a cord and facilitates replacement of a second plug that is engageable with the existing plug in the event the second plug is damaged. In one embodiment, an assembly includes a first plug member with male and female end portions, and a retaining element configured to engage with the first plug member and at least a portion of a cord that includes a second plug member configured to engage with the first plug member. When the retaining element is engaged with the first plug member, one of the female end portion and the male end portion of the first plug member is accessible for engagement with a third plug member. Additional and/or alternative embodiments, forms, features and aspects are disclosed herein.