power cables силові кабелі 3 621.315.2 2 621.319 2 621.315 1 aluminum conductive core 1 cable classification criteria 1 cable infrastructure 1 certified test base 1 coefficient of irregularity of current distribution 1 complex resistance 1 conductor 1 construction industry 1 contact potential difference 1 cross-linked polyethylene insulation 1 current frequency 1 current rating computation 1 dielectric loss tangent 1 double bends number 1 electromagnetic processes 1 fire load 1 fire safety 1 halogen-free compositions 1 induction heat treatment 1 inductor efficiency 1 linear and exponential regression analysis 1 magnetically coupled circuits 1 measurement 1 mechanical and thermal ageing 1 multiscale modeling 1