Wire Gauge Ampacity: Difference between revisions
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=Tables - Copper= | =Tables - Copper= | ||
#Engineering Toolbox - [https://www.engineeringtoolbox.com/wire-gauges-d_419.html] | #Engineering Toolbox - [https://www.engineeringtoolbox.com/wire-gauges-d_419.html] | ||
#Powerstream - [https://www.powerstream.com/Wire_Size.htm] | #Powerstream - [https://www.powerstream.com/Wire_Size.htm] | ||
Latest revision as of 18:28, 31 August 2023
Basics
- How much Electrical Current a wire, and to an extent a circuit, can carry
- Important to calculate so that you don't have Electrical Fires due to Overheating
- 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]
- It is however cheaper, at least in terms of the conductors, Aluminum Wire Compatible Outlets etc may complicate the budgeting, but Aluminum or Copper Clad Aluminum (CCA) are worth considering
Tables - Copper
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" - [6]
22 Ga for D3D
- At 24V we need 5A for the main power supply, so 22 ga should be good. 80C rating of [7]. Engineering Toolbox says 1 strand is good for 5A.
Discussion
- What are the limits to motor startup current, and common house wire? See discussion at Wire Ampacity: