Kelvin Posted October 10 Share Posted October 10 17 minutes ago, ProDave said: The 3M linit is only if you are relying on the DNO's fuse as the circuit protection. Fit your own (in my case switch fuse with 80A fuse in it) and there is no such limit. I get that but SSEN were very insistent on 3m being ‘the limit’ which is what I meant by they’ll tell you… Link to comment Share on other sites More sharing options...
saveasteading Posted October 11 Author Share Posted October 11 I have another little job to do, putting in an swa across the garden for future car charging. I will later get an electrician to connect it at the fuse board and a socket. I'm thinking domestic overnight charging is basically a 3 pin socket???? I have no idea what spec of cable this should be and the electrician isn't available right now. Link to comment Share on other sites More sharing options...
saveasteading Posted October 11 Author Share Posted October 11 TS say 6mm2. another site says this, and includes a data cable EV-Ultra 10mm 3 Core + Cat5E SWA Armoured Electric Vehicle Power Charging Cable Black Link to comment Share on other sites More sharing options...
Thorfun Posted October 11 Share Posted October 11 7 hours ago, saveasteading said: I have another little job to do, putting in an swa across the garden for future car charging. I will later get an electrician to connect it at the fuse board and a socket. I'm thinking domestic overnight charging is basically a 3 pin socket???? I have no idea what spec of cable this should be and the electrician isn't available right now. Can you not just run a duct and pull it through when required? Link to comment Share on other sites More sharing options...
saveasteading Posted October 12 Author Share Posted October 12 13 hours ago, Thorfun said: Can you not just run a duct and pull it through when required? Thanks. A good point. No need. Has its own risks of the cable snagging as it is a chunky cable. Needs kit and strong workers Cost The advantage would be of delaying the cable purchase. We could just put in the kiosk now but the rest becomes more difficult when we come to it. Link to comment Share on other sites More sharing options...
saveasteading Posted October 12 Author Share Posted October 12 23 hours ago, saveasteading said: 3 Core + Cat5E SWA Answering my own question....This data cable is for linking the car to a smart meter and / or to apps in the house. Seems like a benefit worth paying for, to take advantage of tariffs in the middle of the night. And it seems that 6mm and 10 mm are the sizes touted for charging. for a permanent cable, I will select the bigger one. Link to comment Share on other sites More sharing options...
Thorfun Posted October 12 Share Posted October 12 29 minutes ago, saveasteading said: Answering my own question....This data cable is for linking the car to a smart meter and / or to apps in the house. Seems like a benefit worth paying for, to take advantage of tariffs in the middle of the night. And it seems that 6mm and 10 mm are the sizes touted for charging. for a permanent cable, I will select the bigger one. You’ll need a cable for a CT clamp as well possibly. Our EV charger monitors energy production and usage in the house via a CT clamp. So I’d run 2 x cat5 cables just in case! Link to comment Share on other sites More sharing options...
Thorfun Posted October 12 Share Posted October 12 3 hours ago, saveasteading said: Thanks. A good point. No need. Has its own risks of the cable snagging as it is a chunky cable. Needs kit and strong workers Cost The advantage would be of delaying the cable purchase. We could just put in the kiosk now but the rest becomes more difficult when we come to it. Fair enough. We ran ducts and pulled cables through later. Only issue we had is I forgot to remove the draw string that came with the duct and that made it tricky to pull through. I won’t make that mistake again! 1 Link to comment Share on other sites More sharing options...
saveasteading Posted October 12 Author Share Posted October 12 4 minutes ago, Thorfun said: Only issue we had I have seen our electrician boss personally use a Tirfor winch to get a a cable through a perfectly good duct, but it stuck. He was afraid it would stretch or snap so we had to dig intermediate points. The cable was dragging in the duct. That is the issue I think with a big cable. It is stiff and unforgiving. And the blue rope......It isn't strong and only for pulling a special cable through first. The supplied drawstring pulls through blue cord pulls through some special cable, pulls the electric cable. I have just been advised that we are now supposed to use a specialist winching team for it.....that decides it if it wasn't already. 1 Link to comment Share on other sites More sharing options...
saveasteading Posted October 12 Author Share Posted October 12 14 minutes ago, Thorfun said: a CT clamp What is one of them? Doesn't the cable work both ways? I thought I was being fairly flash heading for 10mm plus comms cable. I don't see any with 2 cables. I can't copy the picture but here is the link IF you are interested. OR IGNORE https://www.superlecdirect.com/evultra3x10cat5swa-electric-vehicle-charging-cat5e-swa-cable-10mm-black/ Link to comment Share on other sites More sharing options...
Thorfun Posted October 12 Share Posted October 12 (edited) 4 hours ago, saveasteading said: What is one of them? Doesn't the cable work both ways? I thought I was being fairly flash heading for 10mm plus comms cable. I don't see any with 2 cables. I can't copy the picture but here is the link IF you are interested. OR IGNORE https://www.superlecdirect.com/evultra3x10cat5swa-electric-vehicle-charging-cat5e-swa-cable-10mm-black/ A CT clamp measures the current running through a cable and smart things do stuff with that information. That cable doesn’t really have a cat5 cable as it has only a single twisted pair. Probably good for installers as it reduces the number of cables to run. A Cat5e cable will have 4 twisted pairs so if you only need one pair for comms and one pair for a CT clamp then maybe a single Cat5e cable will be enough. or maybe the "comms" that your charger is talking about is actually just for a CT clamp? I might suggest much more research to decide what you need. But cat5e cable is cheap so might be better to just run separate cables as it could be cheaper than that all-in-one cable. The choice is yours. Edited October 12 by Thorfun Link to comment Share on other sites More sharing options...
Thorfun Posted October 12 Share Posted October 12 I fitted our EV charger to the old property but running electrics from the new property so I could charge from the solar PV on the new house. I ran 2 x ducts buried in the ground and then fed an SWA cable and a bury-able Cat5e cable. hopefully you can see them coming out of the ducts. eventually those ducts and SWA were supposed to feed a new chicken house but those plans have been knocked on the head so I'll probably just end up burying the ducts and pulling the cables back through for use elsewhere. The Cat5e cable is connected to a CT clamp that tells my charger when enough solar is being exported and then sent the excess to the car. the charger also has a max current limit so that if the total draw of the house and car ever got above a certain amount the charger would throttle the charge to avoid tripping the main fuse. some chargers have wireless CT clamps though so you can get around it but for the cost of a network cable just run one (or two) or a duct so you can pull as many as you need at a later date. Link to comment Share on other sites More sharing options...
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