IEC Standards IEC TR 61597-2021 pdf free download – Overhead electrical conductors – Calculation methods for stranded bare conductors IEC TR 61597-2021 pdf free download - Overhead electrical conductors - Calculation methods for stranded bare conductors. Based on these values at 20°C, the DC resistances have been calculated for temperatures of50C.8o C and 1oo °c. The... 02-16 Download Now