# What are Ampacity Correction Factors for Different Types of Cables?

**URL:** <https://forumautomation.com/t/what-are-ampacity-correction-factors-for-different-types-of-cables/13030>\
**Category:** Electrical\
**Tags:** cable-selction, cablesizing\
**Created:** [February 18, 2025, 1:41pm UTC](https://forumautomation.com/t/what-are-ampacity-correction-factors-for-different-types-of-cables/13030 "2025-02-18T13:41:09Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Rabert](https://forumautomation.com/user_avatar/forumautomation.com/rabert/32/6784_2.png) [@Rabert](https://forumautomation.com/u/Rabert)\
**Post date:** [February 18, 2025, 1:41pm UTC](https://forumautomation.com/t/what-are-ampacity-correction-factors-for-different-types-of-cables/13030/1 "2025-02-18T13:41:09Z")

</div>

In Ampacity of a Conductor, temperature determines the **[ampacity](https://forumelectrical.com/armature-voltage-calculator-for-dc-motor/)** of a conductor.

The ampacity of an electrical cable changes with changing ambient temperature.

Correction factors are used in this process to get fresh ratings for a conductor of such condition.

For cables, that have insulation is rated at **90° C** , the following approximative ampacity correction factors apply under various ambient temperature conditions:

| Ambient Temperature | Correction Factors for Insulation of Cable Rated At: |
| --- | --- |
| (°C) | 90°C |
| 10 | 1.26 |
| 20 | 1.18 |
| 30 | 1.1 |
| 40 | 1 |
| 50 | 0.9 |

 ![image](https://cdn.forumautomation.com/original/2X/2/2d2fe4992902ee46c56ddd6195eea7c83af6ffcd.jpeg)

> ### You can also follow us on [**AutomationForum.co**](https://automationforum.co/), [**Facebook**](https://www.facebook.com/instrumentation.control) and [**Linkedin**](https://www.linkedin.com/showcase/81532759/feed/posts/) to receive daily Instrumentation updates.

> ### You can also follow us on [**ForumElectrical.com**](https://forumelectrical.com/), [**Facebook**](https://www.facebook.com/profile.php?id=100091841583670) and [**Linkedin**](https://www.linkedin.com/showcase/91130242/feed/posts/) to receive daily Electrical updates.