An electric socket outlet consists of a mounting box into which the cable is fed and a faceplate with terminals to which the cable cores are connected. The faceplate will usually have either one, two or three power outlets and will be referred to as a one, two or three gang socket. The holes in the faceplate for the plug pins are shuttered to make them childproof. Socket outlets can be either flush or surface-mounted to the wall, although surface mounted sockets are more vulnerable to being cracked following an impact, so it is worth considering replace these with flush-mounted sockets. If a socket is damaged do not use it until it has been repaired. Scorch marks on the faceplate or around the pin holes indicate poor connections.
White and square, this is the main phone connection socket that has to be installed by the telephone company.
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