Wire Gauge Ampacity: Difference between revisions
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*What are the limits to motor startup current, and common house wire? See discussion at Wire Ampacity: | *What are the limits to motor startup current, and common house wire? See discussion at Wire Ampacity: | ||
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Revision as of 01:50, 23 June 2022
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
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" - [7]
22 Ga for D3D
- At 24V we need 5A for the main power supply, so 22 ga should be good. 80C rating of [8]. 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: