< img src="https://mc.yandex.ru/watch/97359852" style="position:absolute; left:-9999px;" alt="" />
Send Message
Home > News >
Company News About How many amps can the 3C95 SQMM cable handle?
Contacts: Mr. Zihao Yang   
Contact Now
Mail Us

How many amps can the 3C95 SQMM cable handle?

Latest company news about How many amps can the 3C95 SQMM cable handle?

The current-carrying capacity of a 3C95 sq. mm cable (three-core cable with a cross-sectional area of 95 square millimeters per core) depends on several factors including the installation method, ambient temperature, and insulation material. 



1. Reference Conditions

  • Ambient Temperature: Standard ratings are usually given for an ambient temperature of 30°C.
  • Installation Method: Whether the cable is installed in the air, buried in the ground, or in conduit.



2. Current-Carrying Capacity

Using the IEC (International Electrotechnical Commission) standard and typical manufacturer data, the approximate current-carrying capacity for a 3C95 sq. mm cable with copper conductors and standard PVC insulation can be outlined as follows:



In Air:

  • The current-carrying capacity could range from approximately 285 to 305 amps, depending on factors such as grouping, installation conditions, and derating factors.



Buried in Ground:

  • When buried directly in the ground, the current-carrying capacity might be slightly lower due to reduced cooling efficiency. It typically ranges from 260 to 280 amps.



In Conduit:

  • Installed in conduit, the capacity is also influenced by the heat dissipation characteristics of the conduit material and installation environment. It might be similar to or slightly less than the "in air" rating.



Example Calculation for a Specific Standard:



Using IEC 60364-5-52:

According to the IEC 60364-5-52 standard:

  • For a cable installed in air (method of installation C), the rating for a 95 sq. mm copper conductor cable can be around 300 amps.



Using NEC (National Electrical Code):

For reference, the NEC provides different ampacity tables but generally aligns with the aforementioned values, with adjustments for temperature, conduit fill, and other derating factors.



Correction Factors:



It’s crucial to apply correction factors for:



  • Ambient Temperature: For temperatures higher or lower than the reference temperature (30°C), apply correction factors from standard tables.


  • Grouping: If multiple cables are grouped together, the current-carrying capacity of each cable might need to be derated.





For precise determination, always refer to specific standards such as the IEC 60364-5-52, NEC tables, or manufacturer datasheets. They will provide the most accurate ampacity based on your specific installation conditions.






  • IEC 60364-5-52: Electrical installations of buildings - Selection and erection of electrical equipment - Wiring systems.


  • NEC (National Electrical Code): Provides ampacity tables and correction factors.


  • Manufacturer Datasheets: Specific to the cable being used, which consider insulation type, conductor material, and other factors.












Always consult the most recent version of these standards and datasheets to ensure compliance and accuracy.