How to make an EV slow charger extension cable for your car. Granny charger electric extension lead.
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- Опубликовано: 18 ноя 2024
- In this video I show you my EV slow charger extension cable that I made from parts from Screwfix and Medlock in the UK. Sometimes the standard length of a granny charger is never long enough, you never know when you need an extra electric vehicle extension cable.
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#evcharger #grannycharger #slowcharger #evextensioncable #extensioncable #slowchargerextension #grannychargerextension
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Parts
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Cable - www.medlocks.c...
Outdoor Socket - www.screwfix.c...
Dry Bags
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The Range - www.therange.c...
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Make sure you use 1.5mm cable as Daniel did. (not 1.25). To periodically check the extension, use it for an hour and feel the plugtop and socket for excessive heat.
You are correct I used a normal 30m extension cable and it’s rated at 16amps and it’s getting warm on the plug on my 10 amp granny charger.
I think I need to go out and buy a higher amp rated extension cable
You’ve made a good job of the extension lead, however, the manufacturer’s of granny chargers are so concerned about the plug/ socket overheating that they put a temperature sensor in the plug that switches off the charger if overheating occurs. I believe the overheating would occur in the socket rather than the plug. Beefed up sockets are available as standard ones are not continuously rated.
Thats a really good idea. Poor contacts on a normal 13a socket causes a nasty runaway effect which can easily melt the socket. I know this because I melted the socket. It does make you wonder what 13A actually means. They are not even drawing that and still melt.
Thanks for this. Managed to create the same thing from B&Q for just under £30, whereas the EV cable would have cost £160!
Great, glad it helped
Good video,-I used Medlock too,anything over £10 is delivery free!
That's good to know
You said you can make the cable any length you want...voltage drop amperage drop? Over what maximum length can this cable be before the amps drop below your required 10 amps. Next size up cable would allow what length? Sóme people may need something longer than 10m.
Just look this up online. I'm in NA and we use different thickness measurements but generally you move up to the next gauge/thickness every 50ft to reduce resistance.
Great idea! I’m thinking of doing this but in the cable shows 4 wires but your plug only has 3. What did you do with the 4th cable please?
I guess I must have terminated it and didn't use it
@@daniel_coe Cheers 👍
Fantastic video mate. Just saved me about £70 quid thx
Glad I could help
@@daniel_coe just a follow up.
I got the cable (blowing 32m / this is how much I need from back of the garden to my designated parking space) and connected everything together and I got custom made granny charger.
Thank you once again for the video.
The longest ready cable on the market is 25m which would be just too short. You saved me.
@@pawelwitkowski5160 brilliant news.
I wonder if 16 amp caravan hook up cable would be ok as i have a long cable spare in loft. And just change the plugs and put a box on it.
Thanks exactly what I need to build and had been looking at the same sort of solution so good to see it works.
Is there any issues with using the socket box flat vs the wall mounted position with regards to its IP rating?
Will probably look to make mine. A bit longer as I’m in a terrace house with on street parking. The two additional steps I need to figure out is how to run the cable outside in the winter as I can’t put an outdoor socket on the house. Plus I’m going to need to get a trip hazard cover for the pavement that will stand up to any complaints.
I don't think there is a problem keeping the box flat. You could always put a cover over it or put that part under the car etc
@@daniel_coeI think there is a problem. Avoid extra square 13A three pin plugs and sockets. Better, for a permanent installation, is a 2.5mm^2 three core cable and an in-line connector - just remove the plug on the granny cable and add a suitable length of cable.
This does not conform to bs7671 charging points must be wall mounted extension leads are not allowed.Also outside 13amp socket must be ev type for continuous load an example is Hager wxpss81ev
Is the bag used to cover the socket when charging ??? or just for storage ?? If its for charging how can it go inside the bag with cables from the mains side and the other side (the granny charger) also is 22 metres ok ?? ...
Just for storage, as the front trunk on the BMW i3 is not watertight.
Very useful video. Just one question: the wet bag, daft one I know, is it for covering the socket, only I see that the socket is waterproof. Thanks.
It's to keep the socket dry as the i3 front trunk where we store it is not completely water tight.
How safe is that 3 pin plug when plugged in and what breaks should you use
Iv already got a wall socket like this outside can i simply plug in 3pin 8 metre granny charger into 60kwh megabe etech without risk of fried electrics ? Having a nightnare with ohme attenpting to get a proper car charger
It's fine if you are using a slow 2kwh granny charger.
@daniel_coe and you are basing that statemwnt on what exactly?
Just wondering as the standatrd 13A 3 pin sockets are NOT safe to use for EV charging at all. Same goes for the one u used on your extension lead too and you proba ly plugged that into a normal 13A socket too.
Therw are special 13A EV approved aocket that you can buy and use.
Standard non EV marked 13A socket is not built for 20 hours of 10A continuous current.
Its a recipe for diaaster that extension lead to be honest.
Just fit an external socket that is EV approved even if it is 13A one for granny charger you will not regret it.
Contraptions like yours are possibly ok under supervison as an emergency solution. However i would fit an EV approved 13A socket on it and minimum 1.5mm flex.
No way i would go to sleep with that on, either...
Sorry for the dumb question. What is the dry bag for? For storage or use when charging??? Cheers for the vid ordered the parts as getting EV next week and in the process of buying a new house so need a granny for the interim.
Just to keep it dry as the i3 front trunk is not completely waterproof.
Lifesaver. Thank you kindly for sharing the knowledge. :D
No problem!
@daniel_coe hi, I am looking to make one myself. Do I need a 13amp fuse for both plugs, the one that goes into the house and the one in the waterproof housing?
In iraq we used 2,5×3mm .it is the best
Great tutorial
Thank you! Cheers!
How can you plug an ev directly into mains?
It's called a "Stuffing Gland"
Thank you
I thought you main plugs got fried if you do this?
Can I run a 40 metre cable with this method?
That's a long cable. I don't know if you'd lose some power over that distance. But certainly worth a go if you can afford around £50+ on cable.
Just move up to the next gauge or wire thickness to reduce resistance. There are standard amps per distance per gauge/thickness that you can search online.
Can u use that long term
I don't see why not
Does your EV electrical die?
I think 2.5mm cable would be better, my 1.5mm heats up on 10amps
I have not run it for a long length of time. It was really just for a few hours. My wife very rarely uses it now. Thanks
@@daniel_coe The official ev 3 pin socket has a RCBO included. The regulation is for this type to be used outdoors.
Article cable would have bee better