RHW является маркой кабеля по системе NEC / UL (USA): R = Thermoset (originally rubber) insulation; H = Heat resistant, 75 C; W = Approved for wet locations; RHW = Thermoset (rubber-type) heat- and moisture-resistant building wire, 75 C. 600 V, 75 C dry and wet. UL 44; NEC Article 310.