# How do I best extend an RS485 Cable?

**URL:** <https://community.victronenergy.com/t/how-do-i-best-extend-an-rs485-cable/29705>\
**Category:** Q&A and troubleshooting\
**Tags:** rs485, domestic, beginner, cerbo\_gx\
**Created:** [22 April 2025 09:07 UTC](https://community.victronenergy.com/t/how-do-i-best-extend-an-rs485-cable/29705 "2025-04-22T09:07:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Brp](https://avatars.discourse-cdn.com/v4/letter/b/48db29/32.png) [@Brp](https://community.victronenergy.com/u/Brp)\
**Post date:** [22 April 2025 09:07 UTC](https://community.victronenergy.com/t/how-do-i-best-extend-an-rs485-cable/29705/1 "2025-04-22T09:07:18Z")

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I have a 5m USB to RS485 cable, I inted to use for connecting Cerbo GX to the smart meter.

However, the 5m are not long enough and I need to extend it.

What is the best way to do it?

Can I use, say, a CAT8 Patch cable for it?

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**Author:** ![GUMPY](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/gumpy/32/8043_2.png) [@GUMPY](https://community.victronenergy.com/u/GUMPY)\
**Post date:** [22 April 2025 11:56 UTC](https://community.victronenergy.com/t/how-do-i-best-extend-an-rs485-cable/29705/2 "2025-04-22T11:56:30Z")

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Extend the USB side with a USB extension cable  
Simple easy quick and cheap

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**Author:** ![DuivertNL](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/duivertnl/32/279_2.png) [@DuivertNL](https://community.victronenergy.com/u/DuivertNL)\
**Post date:** [22 April 2025 12:06 UTC](https://community.victronenergy.com/t/how-do-i-best-extend-an-rs485-cable/29705/3 "2025-04-22T12:06:23Z")

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Cat 5 or 6 is good enough also