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# Difference between revisions of "Wire length tables"

Mcm781 (talk | Contributions) (→Tables) |
Lonny (talk | Contributions) (→Calculating Wire Sizes: used number formatting) |
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==Calculating Wire Sizes== | ==Calculating Wire Sizes== | ||

Assumptions made: | Assumptions made: | ||

− | + | # 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 | |

The following equation was used, rearranged, and iterated on to produce the above table: | The following equation was used, rearranged, and iterated on to produce the above table: |

## Revision as of 18:56, 17 January 2020

## 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:

- 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

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.