YUN YA3-Z cord extension sockets have been found to pose a serious threat of fatal electrical shock and fire. Faulty socket contacts do not adequately grip their corresponding plug. The problem causes an electrical fault that may result in overheating, melting and fire or electric shock.

The sockets were fitted to various extension cord sets and might differ slightly in appearance. However, most feature a white coloured enclosure with a protective skirt. The sockets feature the following markings: a logo of the manufacturer "Yun", the model/catalogue number "YA3-Z", approval number "N16180" or "N17533" and ratings "10A250V".