Номинальный ток рассматриваемой цепи, A	Минимальная площадь поперечного сечения проводника, мм
До 16 включ.	-
Св. 16 до 25 включ.	1,5
" 25 " 32 "	2,5
" 32 " 40 "	4,0
" 40 " 63 "	6,0
" 63 " 80 "	10
" 80 " 100 "	16,0
" 100 " 125 "	25,0
" 125 " 160 "	35,0
" 160 " 190 "	50,0
" 190 " 230 "	70,0
" 230 " 260 "	95,0
" 260 " 300 "	120,0
" 300 " 340 "	150,0
" 340 " 400 "	185,0
" 400 " 460 "	240,0