4.1.1.9 DC resistance
4.1.1.9.1 The dc resistance of uncoated copper or tin-coated copper conductors shall be as specified in Tables 4, 5, 6, and 7. A plus tolerance of 2% shall be permitted, in the case of a conductor in a twisted multiconductor product having a single layer of conductors. For a twisted multiconductor having more than one layer, a plus tolerance of 3% shall be permitted.
需详细了解“in the case of a conductor in a twisted multiconductor product having a single layer of conductors. For a twisted multiconductor having more than one layer, a plus tolerance of 3% shall be permitted.”是什麽样的结构