Cable net 1 Weeks ago
three Insulation consumption（ Kg/Km ）： = （ D^2 - d^2 ） * 0.7854 * G * C * K2
“ D ”Indicate: insulation outer diameter
“ d ”Indicate: outer diameter of conductor
“ G ”Indicate: insulation specific gravity
“ K2 ”Represent: core wire stranding rate
“ C ”Indicate: number of insulated core wires
six Amount of winding:（ Kg/Km ） = d^2 * 0.7854 * G * N * Z
“ d ”Indicate: conductor wire diameter
“ N ”Indicate: number of pieces
“ G ”Indicate: Specific gravity
“ Z ”Represent: stranding rate
seven Braiding amount:（ Kg/Km ） = d^2 * 0.7854 * T * N * G / cos θ
θ = atan( 2 * 3.1416 * ( D + d * 2 )) * Mesh number / 25.4 / T
“ d ”Indicate: braided copper wire diameter
“ T ”Indicate: number of ingots
“ N ”Indicate: number of bars per ingot
“ G ”Indicate: specific gravity of conductor
Specific gravity of common materials:
copper -8.89 ； silver -10.50 ； aluminum -2.70 ； zinc -7.05 ； nickel -8.90 ； tin -7.30 ； steel -7.80 ； lead -11.40 ； Aluminum foil Mylar -1.80 ； paper -1.35 ； Myra -1.37 ； PVC-1.45 ； LDPE-0.92 ； HDPE-0.96 ； PEF (Foaming) -0.65 ； FRPE-1.7 ； Teflon （ FEP ） two point two ； Nylon-0.97 ； PP-0.97 ； PU-1.21 ； Cotton tape -0.55 ； PP Rope -0.55 ； Cotton yarn -0.48
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among :K Is the overlap rate or clearance rate; if it is overlap, it is 1-K ； If it is clearance, it is 1+K
"ρ" means: material specific gravity
