Wire Gauge Ampacity: Difference between revisions
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=Basics= | |||
*Copper resistivity - 100 compared to aluminum 160. [https://help.leonardo-energy.org/hc/en-us/articles/205394842-Why-use-copper-rather-than-aluminium-as-the-conductor-in-power-cables-] | |||
*Aluminum has about 60% the conductivity of copper, but 30% the weight for a given diameter. All together, aluminum cable is half the weight of copper for the same ampacity. [https://www.anixter.com/en_us/resources/literature/wire-wisdom/copper-vs-aluminum-conductors.html] | |||
=Tables - Copper= | =Tables - Copper= | ||
Revision as of 05:36, 21 April 2020
Basics
- Copper resistivity - 100 compared to aluminum 160. [1]
- Aluminum has about 60% the conductivity of copper, but 30% the weight for a given diameter. All together, aluminum cable is half the weight of copper for the same ampacity. [2]
Tables - Copper
- https://www.engineeringtoolbox.com/wire-gauges-d_419.html
- http://wiki.xtronics.com/index.php/Wire-Gauge_Ampacity
Copper Clad Aluminum (CCA)
Free Air
- "Directly from 4-004(1)(a), you must maintain a cable spacing not less then 100% of the larger cable diameter" - [4]
22 Ga for D3D
- At 24V we need 5A for the main power supply, so 22 ga should be good. 80C rating of [5]. Engineering Toolbox says 1 strand is good for 5A.