Basic House Wiring Old Fuse Box - Telecommunication and Data Communication Wiring Page. General information. Telecommunication cabling is a wide topic. Most generally when we talkabout telecommunication cabling, we are talking about twisted pair cablingused to carry telephone and other telecommunication signals insidebuilding and in the cabling otn the telephone company outside plant.In some applications some other cable types. This is a replacement (for the same item that somebody else may have liked more than I did). If I hadn't liked it the first time, I wouldn't have bought an identical replacement.. The 3 wires are normally hot, neutral, and ground. It sounds like your home doesn't have a ground wire. From Wikipedia: . Equipment earthing conductors provide an electrical connection between non-current-carrying metallic parts of equipment and the earth..