THW-2 является маркой кабеля по системе NEC / UL (USA): T = Thermoplastic (PVC) insulation; H = Heat resistant, 75 C (one H); W = Approved for wet locations; THW = Thermoplastic heat- and moisture-resistant building wire, 75 C. 600 V, 75 C dry and wet. UL 83; NEC Article 310.