JB/T 10181.4-2000
Calculation of the current rating of electric cables.Part 2:Thermal resistance.Section 2:A method for calculating reduction factors for groups of cables in free air,protected from solar fadiation (English Version)
- Standard No.
- JB/T 10181.4-2000
- Language
- Chinese, Available in English version
- Release Date
- 2000
- Published By
- Professional Standard - Machinery
- Status
- 2014-10
- Replace By
- JB/T 10181.22-2014
- Latest
- JB/T 10181.22-2014
- Scope
- This standard applies to any form of cable or cable group laid on a flat surface, as long as all cables have the same diameter and the same loss. This standard proposes that the calculation method for the reduction in allowable ampacity when cables are laid adjacently is limited to a few situations: a) A maximum of 9 cables when laid in a square shape; b) A maximum of 6 loops consisting of three cables arranged in a triangle, including Side-by-side arrangement to three circuits or double layer arrangement to two circuits; careful consideration should be given when the air flow around the cable is restricted by adjacent objects. Calculation methods are proposed for the following situations: ——For a single cable or a circuit laid separately, the ampacity reduction factor of the cable group can be derived from the same type of cable. ——If there is no ampacity data, use the provided data and use the formulas of JB/T 10181.1 and JB/T 10181.3 to calculate the allowable ampacity of the cable group.
JB/T 10181.4-2000 history
- 2014 JB/T 10181.22-2014 Electric cables.Calculation of the current rating.Part 22: Thermal resistance.A method for calculating reduction factors for groups of cables in free air, protected from solar radiation
- 2000 JB/T 10181.4-2000 Calculation of the current rating of electric cables.Part 2:Thermal resistance.Section 2:A method for calculating reduction factors for groups of cables in free air,protected from solar fadiation
JB/T 10181.4-2000 Calculation of the current rating of electric cables.Part 2:Thermal resistance.Section 2:A method for calculating reduction factors for groups of cables in free air,protected from solar fadiation was changed to JB/T 10181.22-2014 Electric cables.Calculation of the current rating.Part 22: Thermal resistance.A method for calculating reduction factors for groups of cables in free air, protected from solar radiation.
