Twisted core insulation between every single line, the current flow is along a single line into a spiral, and power cable all single-wire line core is reliable and current lead-in phase. 1m long strands in the calculation of the length of the layers expand, according to the parallel resistance formula to calculate the stranded DC resistance formula such as:
Still exist between the actual core of the single-wire twisted certain conductance, conductance size, and circumstances of the monofilament surface. Conductance core in the presence of DC incomplete spiral flow along a single line, a part of the current is flowing axially along the filament.
At this time is smaller than the current core DC resistance completely along those filaments into a spiral flow. Because stranded aluminum wires after the resistance had no significant changes in the singlet under qualified, even after taking into account the core into a 1% increase in the length of the cable, twisted wire core resistance still has some margin.
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