Introduction
Describe wire length, voltage loss, etc. here.
Tables
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):
RT length | 5A | 10A | 15A | 20A | 25A | 30A | 40A | 50A |
---|---|---|---|---|---|---|---|---|
15 ft | 16 | 12 | 10 | 10 | 8 | 8 | 6 | 6 |
20 ft | 14 | 12 | 10 | 8 | 8 | 6 | 6 | 4 |
25 ft | 14 | 10 | 8 | 8 | 6 | 6 | 4 | 4 |
30 ft | 12 | 10 | 8 | 6 | 6 | 4 | 4 | 2 |
40 ft | 12 | 8 | 6 | 6 | 4 | 4 | 2 | 2 |
50 ft | 10 | 8 | 6 | 4 | 4 | 2 | 2 | 1 |
60 ft | 10 | 6 | 4 | 4 | 2 | 2 | 1 | 1/0 |
70 ft | 8 | 6 | 4 | 2 | 2 | 2 | 1/0 | 2/0 |
80 ft | 8 | 6 | 4 | 2 | 2 | 1 | 1/0 | 2/0 |
90 ft | 8 | 4 | 2 | 2 | 1 | 1/0 | 2/0 | 3/0 |
This table was adapted from https://www.engineeringtoolbox.com/amps-wire-gauge-d_730.html .
Calculating Wire Sizes
Assumptions made:
1. copper wire resistivity = 11.2 2. 3% loss from wires 3. allowable voltage drop = 0.36V - 12V system, 3% (0.03) wire loss -> 12V x 0.03 = 0.36V
The following equation was used, rearranged, and iterated on to produce the above table:
Algebraically rearrange Eqn. 1 to solve for n. The resulting equation is Eqn. 2 below:
See Help:Tables.
Use help:references to see how to use the reference format.[1]
Use Help:Images on how to upload the graph image(s). Please remember to use a very descriptive name for the file.
References
- ↑ It is quite easy and just relies on ref and /ref in between less than and greater than symbols.