# Tether wfire gauage

**URL:** <https://discuss.bluerobotics.com/t/tether-wfire-gauage/7140>\
**Category:** General Discussion\
**Created:** [April 1, 2020, 2:12pm UTC](https://discuss.bluerobotics.com/t/tether-wfire-gauage/7140 "2020-04-01T14:12:49Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![rama5651](https://avatars.discourse-cdn.com/v4/letter/r/34f0e0/32.png) [@rama5651](https://discuss.bluerobotics.com/u/rama5651)\
**Post date:** [April 1, 2020, 2:12pm UTC](https://discuss.bluerobotics.com/t/tether-wfire-gauage/7140/1 "2020-04-01T14:12:49Z")

</div>

how to choose (AWG)wire gauge for dc power transmission. can any one explain about outland technology ,how they choose the 23 AWG for 400v dc power transmission. there is any formula for calculate the AWG for higher voltage

---

<div class="post-metadata">

**Author:** ![k-deboer](https://avatars.discourse-cdn.com/v4/letter/k/e8c25b/32.png) [@k-deboer](https://discuss.bluerobotics.com/u/k-deboer)\
**Post date:** [April 1, 2020, 3:31pm UTC](https://discuss.bluerobotics.com/t/tether-wfire-gauage/7140/2 "2020-04-01T15:31:16Z")

</div>

@rama5651,  
Power supply modules have a max, and min operating voltage. By using a voltage drop calculator, you can determine the values that meet your needs. Like increasing the wire gauge for longer tethers. Or increasing the surface supply voltage for a given tether gauge.

> **[Voltage Drop Calculator](https://www.calculator.net/voltage-drop-calculator.html?material=copper&wiresize=66.79&voltage=360&phase=dc&noofconductor=1&distance=100&distanceunit=meters&amperes=10&x=37&y=13)**
>
> This free voltage drop calculator estimates the voltage drop of an electrical circuit based on the wire size, distance, and anticipated load current.

For example, this DC-DC converter has a min-max range of 160-420VDC. [http://www.vicorpower.com/documents/datasheets/DCM4623xD2K17E0yzz\_ds.pdf](http://www.vicorpower.com/documents/datasheets/DCM4623xD2K17E0yzz_ds.pdf).  
Given the estimated maximum power you want, you can adjust the gauge, or length to meet this range.

---

<div class="post-metadata">

**Author:** ![rama5651](https://avatars.discourse-cdn.com/v4/letter/r/34f0e0/32.png) [@rama5651](https://discuss.bluerobotics.com/u/rama5651)\
**Post date:** [April 1, 2020, 4:04pm UTC](https://discuss.bluerobotics.com/t/tether-wfire-gauage/7140/3 "2020-04-01T16:04:22Z")

</div>

thank you very much. any formula is their to calculate wire gauge,suppose voltage is 400V and power is 1800W then how to calculate AWG.

---

<div class="post-metadata">

**Author:** ![k-deboer](https://avatars.discourse-cdn.com/v4/letter/k/e8c25b/32.png) [@k-deboer](https://discuss.bluerobotics.com/u/k-deboer)\
**Post date:** [April 1, 2020, 4:08pm UTC](https://discuss.bluerobotics.com/t/tether-wfire-gauage/7140/4 "2020-04-01T16:08:03Z")

</div>

You will need your minimum voltage required at the end of the tether, and the length of the tether you want to use. Then we can calculate the minimum AWG needed

---

<div class="post-metadata">

**Author:** ![rama5651](https://avatars.discourse-cdn.com/v4/letter/r/34f0e0/32.png) [@rama5651](https://discuss.bluerobotics.com/u/rama5651)\
**Post date:** [April 1, 2020, 4:26pm UTC](https://discuss.bluerobotics.com/t/tether-wfire-gauage/7140/5 "2020-04-01T16:26:33Z")

</div>

thank you very much.my tether other end voltage around 350v and my tether length is 100m.actually i  
need formula to find the AWG for 400v ,1800w,100meter tether length.

---

<div class="post-metadata">

**Author:** ![spotxuv](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/spotxuv/32/1112_2.png) [@spotxuv](https://discuss.bluerobotics.com/u/spotxuv)\
**Post date:** [April 2, 2020, 12:41am UTC](https://discuss.bluerobotics.com/t/tether-wfire-gauage/7140/6 "2020-04-02T00:41:58Z")

</div>

High voltage, high current electricity transmission, in a wet environment, can be extremely dangerous. If you are not sure how to calculate voltage drop, it might not be the place to be tinkering…