# First Wled Setup, Cablemanagement

**URL:** <https://wled.discourse.group/t/first-wled-setup-cablemanagement/14544>\
**Category:** Questions\
**Created:** [June 4, 2025, 12:27am UTC](https://wled.discourse.group/t/first-wled-setup-cablemanagement/14544 "2025-06-04T00:27:20Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![nickname312](https://avatars.discourse-cdn.com/v4/letter/n/3d9bf3/32.png) [@nickname312](https://wled.discourse.group/u/nickname312)\
**Post date:** [June 4, 2025, 12:27am UTC](https://wled.discourse.group/t/first-wled-setup-cablemanagement/14544/1 "2025-06-04T00:27:20Z")

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![LED_Wohnzimmer.drawio](https://global.discourse-cdn.com/free1/uploads/wled/original/2X/1/13a98c77b5183fab342a3788fa592158bf627d02.jpeg)

So this is my first Plan.  
I have 3 Power Supplies 5V 70A 350W, 3x 5m SK6812 144LED/m, 14m 45 degrees aluminum profiles with diffuser.

All 3 Powesupplies are at the same spot. The LEDS gonna be in the ceiling inside corner

Im planning to use 4mm² cables on the 2x 2,33m entrances, 6mm² cables on the 2x 7,33m and 2x6mm² cables on the 1x 10,48m(parallel, cheaper than 10mm²). I didnt buy cables yet, I tried to find out how high the voltage drop within the cables is, and according to the formula ΔV=A/(2⋅L⋅I⋅ρ​), even 10 mm² is too small for 7.33 meters; the loss should be 0.78 V.

Im gonna use a ESP32 with WLED, its gonna be rigt on the stripes, maybe 20cm away.

Questions:

1. Is my cable management planned correctly/efficient?
2. Which Cables do i need for the respective lentghs?
3. Do i need a level shifter for my ESP 32?
4. can i connect the data lines with 0,2mm cables?
5. Do i have to connect all grounds? ESP32, and all Grounds of the 3 PSU/LEDS?
6. Where and how am i supposed to hide all those cables?
7. Anything else i forgot and/or dont even know exists 😅

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**Author:** ![dedehai](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/dedehai/32/7265_2.png) [@dedehai](https://wled.discourse.group/u/dedehai)\
**Post date:** [June 4, 2025, 5:58am UTC](https://wled.discourse.group/t/first-wled-setup-cablemanagement/14544/2 "2025-06-04T05:58:41Z")

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> **[LED power calculator](https://wled-calculator.github.io/)**

you need one injection about every 5A worth of LEDs. make sure to add fuses, 70A is some serious current.

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**Author:** ![Jinx](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@Jinx](https://wled.discourse.group/u/Jinx)\
**Post date:** [June 4, 2025, 5:56pm UTC](https://wled.discourse.group/t/first-wled-setup-cablemanagement/14544/3 "2025-06-04T17:56:40Z")

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and don’t connect the DC + from one power supply to another power supply. All DC grounds must be common. \>\>The bottom right corner of your diagram shows 2 positive connections from 2 different power sources connected together.

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**Author:** ![nickname312](https://avatars.discourse-cdn.com/v4/letter/n/3d9bf3/32.png) [@nickname312](https://wled.discourse.group/u/nickname312)\
**Post date:** [June 5, 2025, 12:24am UTC](https://wled.discourse.group/t/first-wled-setup-cablemanagement/14544/4 "2025-06-05T00:24:52Z")

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No it doesn’t. I coudlnt rly visualise it so i wrote frost second and third stripe.on the right corner a 5m stripe ends another one begins