XTU on NCh / SEC (Chile)-järjestelmän kaapelin tyyppimerkintä: XTU = Single-core, per the catalogue heading; XTMU is multicore; XTU = XTU / XTMU: Cocesa single-core (XTU) and multicore (XTMU) tray-rated cable, per catalogue heading. not stated (UNVERIFIED). not stated in extract.