This standard is equivalent to the International Electrotechnical Commission (IEC) standard, IEC60649:1979 "Calculation of the Maximum Outer Diameter of Cables for Indoor Installations". This standard is the basic standard for internal cables and wires for communication users. When formulating product standards, the calculation method for the maximum outer diameter of cables specified in this standard should be adopted. This standard is the national standard formulated for the first time.
GB/T 18212-2000 history
2000GB/T 18212-2000 Calculation of maximum external diameter of cables for indoor installations