fibre + copper power cable

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Lemming

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#315851 22-Aug-2024 17:21

Hiya, I have been googling whether a fibre + copper composite cable is a thing.. turns out yes..

Gotcha is have only found a 2c 6mm option. We have a remote gate 2km down a road from the power supply, and I want to power the gate as well as run cameras / access control over the fibre.

I can get around 3A @ 400V, which maybe OK to drive a charger and DC the gate..

Wondering if anyone stubbled accross a cable with bigger conductors ? 10mm prob the sweet spot..

Cheers Chris

lxsw20

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#3274549 22-Aug-2024 18:19

2km....surely a solar/battery solution and P2P wifi bridge would work out better here?

tweake

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#3274553 22-Aug-2024 18:58

local place has solar panel and battery for the gate. seams to work well.

Lemming

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#3274573 22-Aug-2024 20:26

is a big gate, down a long twisty valley with potentially many opens per day. Solar has been investigated.

tweake

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#3274590 22-Aug-2024 21:34

whats the wattage of the drive motors on the gates and how long would they take to open?

coffeebaron

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#3274595 22-Aug-2024 21:45

Maybe use a combination of power sources + batteries. E.G. solar + low wattage power over cable. Then let the batteries drive the system and keep the power sources for keeping it charged.

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Lemming

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#3274872 23-Aug-2024 19:58

coffeebaron: Maybe use a combination of power sources + batteries. E.G. solar + low wattage power over cable. Then let the batteries drive the system and keep the power sources for keeping it charged.

opener TBC, I was assuming some hefty batteries, and as many watts charge I could get through the cable. I dont really know much about DC actuators.. but assume if we want it to move fairly quickly, will be a few watts.

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raytaylor

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#3277269 30-Aug-2024 20:22

At 2kms - it would probably fail the megtest and others that electricians like to do before they will issue the COC.

I regularly have a scenario where i'll say to my electrician that i have buried a 200 metre tps cable and want it wired up to the breaker board at one end with a 230v outlet on the other end. He always says it will fail but then it ends up passing. But even then i am pushing it - 2kms would be out of the question unless your stepping it up and using a very thick cable.

The main issue is that the resistance in such a long line can make it hard for breakers to trip on a short. They just see it as something like a high draw heater being attached and not enough can get through to safely trip.

I would suggest just running a fiber cable and then use a solar system for power at the far end.

About 30% of all electric gates that get installed are solar powered so just talk to a gate company about a solar powered system and they will have a solution for you. If you are concerned about wanting a fast motor that draws a lot of current for speed, just ask them about a decent one that can run on a big custom solar system.

A composite fiber+power cable is going to shock you when you see the price.
You wouldnt want to see the price of a cable that is capable of carrying enough current with a low enough voltage loss over 2kms and one which an electrician will still issue a COC.

It would be much cheaper just to get them as two separate cables.

I usually run a TPS cable with a separate fiber cable, inside a 32mm duct.

Solar for the camera would also be a more viable option.

You could use a dc powered ethernet switch such as a netonix dc150 which has several POE ports for cameras and an SFP port for the fiber.

Two cameras and a Netonix DC150 with a fiber sfp module will easily run on
- 2x 280w solar panels
- 2x 12v120ah deep cycle batteries in 12v parallel
- 1x 20amp epever AN series solar controller

Enable the streetlight function on the solar controller and add a couple more batteries and you could have 12 watts of lights around the gate for night time illumination or security.

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