Granny charger plug burn out

[securespark]

The only time I used a Granny was when we got the MG4 and before our Ohme Home Pro was installed. I have an MK Masterseal outside on the drive that I ran as a 16A radial using a length of 1.5 butyl heat resistant cable that I had left over from installing immersion heaters. I installed it as a GP outdoor socket for garden tools, lawnmower etc, well before we decided to get an EV.

We used it a lot in the early days and I did check the plug and socket every time, but didn't notice any issues.

 

[securespark]

And a big dollop of luck.

I know you're cynical. I'm just answering Coulomb's query about British Standards.

Hager make a 13A EV charging specific socket.

Chop off your potentially dodgy plug and replace it with an MK646 plug. I should have mentioned these earlier. They are very robust and a reliable plug to use at higher currents.

I don't know about these days, but back in the day, organisations like the PO (and then BT), the BBC, Granada and even the MoD, just to name a few, used to swear by them and all had their marks moulded or printed on the tops of the plugs in place of the MK logo.

 

[securespark]

these sockets I have must be quite something.

What brand are they?

 

[EvTek23]

Do check though before you chop off the plug that it hasn't hot a temperature sensor built in.
The lead is normally quite large and will say something like...3G X 2.5 + 2G X1.5 printed or moulded into the cable. This indicates 5 wires, the 2.5 mm sq being the main power conductors and the 1.5mm sq are the two wires for the sensor.

 

[securespark]

Thanks, yes, please check there are only 3 conductors in your flex before you get snippy!

Regarding 2.5mm² conductors in 13A plugs, BS1363 says the following:

View attachment 367091

So you may find 2.5mm² a little tight, but I have managed it To be honest, the trickier bit is not getting the conductors in the terminals, but getting the flex sheath under the cable grip.

 

[Everest]

So you may find 2.5mm² a little tight, but I have managed it To be honest, the trickier bit is not getting the conductors in the terminals, but getting the flex sheath under the cable grip.

and FWIW; I found the plug mention in my posting below suitable for 2.5mm² arctic flex.

Post in thread 'Granny Charging'

Jul 15, 2025

I made up an extension lead with 2.5 mm2 arctic cable with a rubber plug and single socket.
Granny charging with this lead gave a higher rate of charge on the same granny charger, no heating of the cable / plugs / sockets. Many 13 amp plugs have a max cable size of 1.5 mm2, I drilled mine out for the 2.5 mm2 flex, all worked out really well

we did almost the same to extend our 'granny charger' (as in 2.5mm2 arctic cable, albeit with a command socket on the other end). FWIW, this 'heavy-duty' BS1363 plug accepts 2.5mm2 arctic cable without any modification...

• Everest

 

[Porsche944]

I use one of these

EzGoGo EV Charger - Official Website

Welcome to the official site for EzGoGo, your source for reliable and fast EV charging solutions. Discover our Type 2 charging cables, 3-pin plug electric car chargers, and accessories featuring advanced protection and user-friendly controls for all major EV and PHEV models.

ezgogo.org

Seems well made, its installed in a water proof & glanded box outside. I rewired the pug on it after threading it through the gland. Getting 3 x 2.5mm into a Duraplug was a challenge but I managed it.