What do you do if you want to use a mobile connector and it's not long enough? E.g. at a campsite or something.
I read the MC will detect a voltage drop along a regular extension lead - can you use a heavy duty extension lead? Can anyone recommend one that works?
As
@meloccom pointed out, extending the Type 2 end is a
no-go.
Using an extension lead on the wall socket end of the UMC is discouraged but it is fine
provided you get an appropriately rated lead. Given people might not understand what the relevant parameters are, and therefore put themselves at risk, it is easier to issue a blanket warning against using extension leads.
I have an extra-heavy duty 10A, 10 metre extension lead that I have used a number of times with my UMC without any issues. “Extra heavy duty” must relate to the conductor size, not ruggedness of the sheath or frequency of use. I got this one from Bunnings, it has 1.5mm conductors and can carry 10A continuous without getting warm:
1.5mm conductors for 10A are OK for 10m and 15m leads but borderline for 20m. For 15A, 1.5mm conductors are OK for a 10m lead but
not thick enough for anything longer, and therefore unsafe. You’d need to go to 2.5mm conductors for > 10m at 15A.
It’s this kind of nuance/risk that the lawyers at car companies want to avoid hence the blanket “don’t do it”. I would
never use an extension lead with only 1mm conductors for a mobile charger.
I have found a 10 metre lead is plenty long enough for any situation I have been in to date (over 4 years Tesla driving).