Get our free book (in Spanish or English) on rainwater now - To Catch the Rain.
Difference between revisions of "Wire length tables"
(→Calculating Wire Sizes: used bullets (*) for formatting and removed the tabs. Please don't use tabs to try to force formatting.)
|Line 39:||Line 39:|
''A<sub>n</sub>'': circular mil area
''Conductor resistivity'': constant, 11.2
''Current'': current through wire in Amps, acquired from table
''Roundtrip (RT) wire length'': complete length of wire, ft, acquired from table
''Allowable voltage drop'': voltage drop through wires, V
Revision as of 01:48, 19 January 2020
Describe wire length, voltage loss, etc. here.
The following table shows the American Wire Gauge (AWG) size for several different round trip (RT) wire lengths based on maximum current (A) for a 12V DC system (assuming 3% maximum wire loss):
This table was adapted from Engineering Toolbox  .
Calculating Wire Sizes
- copper wire resistivity = 11.2 
- 3% loss from wires
- allowable voltage drop = 0.36V
- 12V system, 3% (0.03) wire loss -> 12V x 0.03 = 0.36V
- An: circular mil area
- n: AWG
- m: AWG
- Conductor resistivity: constant, 11.2
- Current: current through wire in Amps, acquired from table
- Roundtrip (RT) wire length: complete length of wire, ft, acquired from table
- Allowable voltage drop: voltage drop through wires, V
|Table 2. Calculating Wire Sizes|
|Step 1 : The equation to the left (Eqn. 1) was used, rearranged, and iterated on to produce Table 1. .|
|Step 2 : Algebraically rearrange Eqn. 1 to solve for n. The resulting equation is Eqn. 2 to the left.|
|Step 3 : If n<0, replace n with 1-m in Eqn. 1  .|
|Step 4 : File:3 wireloss.png|
|180x180px|5||Step Solve Eqn. 3 for m, the resulting equation (Eqn. 4) is to the left. : File:4 wireloss.png|
Use Help:Images on how to upload the graph image(s). Please remember to use a very descriptive name for the file.
- It is quite easy and just relies on ref and /ref in between less than and greater than symbols.