Well, it looks like this is more serious than I thought!
Of course all should respect a Host who chooses not to permit EV charging.
It makes me wonder – and we’ve had posts about electric vehicles here – the safety of permitting guests to charge their EV with just a regular or even any extension cord (Level 1 charging).
One site says “as a general rule of thumb, you will need a 12-gauge [outdoor] extension cord for a standard 110-volt outlet and a 6-gauge extension cord for a 220-volt outlet.” Elsewhere the article says that the amperage of the cord must match that of the charger, 32 amps for Teslas, they say. So there’s that.
If a Host does allow Level 1 charging it would make sense either for the Host to figure out the type of cord needed (and supply it) or to require that the guest use the appropriate cord (whether it’s a charging cord or an extension cord)-- some manufacturers say it is not safe to use a typical home extension cord.
One source suggests using this charging cord, which is $250! Or if an extension cord is to be used, this Camco extension cord, which is closer to $150.
Yet some manufacturers say it’s not safe to use an extension cord at all.
The Host incurs risk either way but by providing the cord it’s more likely the guest will use it and damage less likely to result from using an improper cord. The Host should consider the path the cord will take from the outlet to the vehicle and whether it will create a trip hazard.
It looks like Australia has very specific requirements for EV charging (Level 2).
→ The takeaway for me is that a Host without a code-compliant EV charger (Level 2) might want to do some research before permitting guests to plug their vehicle into an outlet, might want to edit rules/confirmation messages, evaluate the safety issues and discuss the situation with their insurer including if EV charging is to be permitted who should provide the cord and what type, whether extension cords should be permitted.
If it were me I wouldn’t permit Level 1 charging for these safety reasons, and permit it only if I had a dedicated Level 2 charger. Even then, as @Pam1 is pointing out, there are risks, which I find acceptable but some might not.
Of course, some Hosts and guests will think this is all overkill. But in the end your property is on the line. Maybe also your neighbor’s.