To tamper or not with charge cord?

Hi all. Situation is that I will need to charge using domestic socket with a cable of 75 feet. I have the standard issue 16 foot toyota car to domestic charging cable with ccid. Which is the better option?
1. Remove the short cable coming out of the ccid that leads to the domestic plug and replace with 75 foot 15A (original seems to be 15 gauge, not sure it will fit the ccid connector if any thicker)
2. Leave the original charging cable intact and simply get a 75 foot 15A extension cable to plug it into, maybe 12 gauge (i cant take advantage of the length of the cable leading from ccid to car to shorten the extension as the ccid would obstruct a walkway)
I have taken on board most if not all of the wise suggestions from forum members previously about safety but dont recall having seen these specific alternatives posed. Thoughts appreciated!

 

Yes, it's 240 (or nowadays 230 volts).

In the UK you have a choice of 1.5mm (14-15 gauge) or 2.5mm cable (c.10 gauge) or up. I have asked 3 professional electricians who start off recommending 2.5mm with 16A commando plug cable. I explain that I am not allowed to alter the sockets on my rented house or extend the wiring outdoors and then they are driving away or keen to get off the phone because I am not buying a $700 installation from them. Ok, one did say a 1.5mm extension cable leading from a 13A plug should be ok before disappearing.

So, something else occurred: buying a16A 2.5mm 75' robust commando cable and using adapters at both ends for commando to three pin plug and commando to three pin socket.

Question is whether this just creates potential heat effects or inefficiencies around the connections and whether to reduce this at the car end, it might be possible to run the cable straight into the charger's CCID by removing the present one that ends in the 3 pin 13A plug: after all there would still be a 13A fuse at the domestic end. But cable could be physically too thick to insert into the CCID connector plug entry point?

I imagine there are sound objections to each idea!

 

Thanks good to be on board by the way.

 

Thanks for your input - you are right re: Commando plugs. I have been learning a lot in the last few days. Please see my first reply (to bisco) for a fuller response...

 

Thanks - sadly I think the maximum cable size that any (UK) three pin socket can take is 1.5mm (14 or 15 gauge). You have to jump to commando plugs for thicker. And commando plugs mean adapters or installing a commando socket running from the house circuit which I think has regulatory issues (and I can't do in any event because its rented - fuller picture in my first reply, to bisco)...

 

Thanks for the input. It would indeed be the perfect solution. Unfortunately I can't make alterations to the house electricals - I explain some more in the first reply, to bisco

 

Thanks - ended up getting some sturdy rubber cable here:
Heavy duty single socket extension leads

Not illegal as such but flies in the face of local safety standards here simply because the cable is a bit too wide to enter the standard 13A domestic socket and plug. But it avoids having adapters and therefore lower gauge wire at either end of the cable.

Also got the weather proof box as recommended above. First charge was a success - 2hrs long and plug was warm but nothing notable.

 

Thanks I actually asked on SpeakEV too and got some good advice. When I can alter house wiring, if I don't get a dedicated charger I will probably get a commando style socket so will be doing that to the end of the charging cable too.