Building wire is fit for AC rated voltage 450/750V and below of domestic electrical appliances of smaller size motorized tools of instruments of various meters and motorized lighting installations. 1.Range of Application  Building  wire is fit for AC rated voltage 450/750V and below of domestic electrical appliances of smaller size motorized tools of instruments of various meters and motorized lighting installations. 2.Service Conditions Working temperature:Not more than 105℃ for RV-105℃ model.The other no more than 70℃ Nominal section (mm2) Number/diameter of core (mm) Maximum outer diameter (mm2) Reference weight (Kg/km) Conductor resistance at 20°C ≤(Ω/km) copper aluminum aluminum copper 1.5(A) 1/1.38 3.3 20.3 ----- ----- 12.1 1.5(B) 7/0.52 3.5 21.6 ----- ----- 12.1 2.5(A) 1/1.78 3.9 31.6 17 11.80 7.41 2.5(B) 7/0.68 4.2 34.8 ----- ----- 7.41 4(A) 1/2.25 4.4 47.1 22 7.39 4.61 4(B) 7/0.85 4.8 50.3 ------ ----- 4.61 6(A) 1/2.76 4.9 65 29 4.91 3.08 6(B) 7/1.04 5.4 71.2 ---- ---- 3.08 10 7/1.35 7.0 119 62 3.08 1.83 16 7/1.70 8.0 179 78 1.91 1.15 25 7/2.04 10.0 281 118 1.20 0.727 35 7/2.52 11.5 381 156 0.868 0.524 50 19/1.78 13.0 521 215 0.641 0.387 70 19/2.14 15.0 734 282 0.443 0.268 95 19/2.52 17.5 962 385 0.320 0.193 120 37/2.03 19.0 1180 431 0.253 0.153 150 37/2.25 21.0 1470 539 0.206 0.124 185 37/2.52 23.5 1810 666 0.164 0.0991 240 61/2.25 26.5 2350 857 0.125 0.0754