Most of the past discussion has been dealing with current and you should be ok using any of the connectors and that #10AWG extension cord from an i-MiEV operating current perspective.bradleydavidgood777 wrote:...But I want to be safe so a few extra bucks may be worth it...
You are using 120vac connectors for either 120vac or 240vac and you are using the 120vac extension cord for either 120vac or 240vac. There are three things to be concerned about:
1. Having the collection plugged into 240vac and having a 120vac receptacle sitting there and the possibility of forgetting (or someone else coming along) and plugging a 120vac appliance into it. Poof!
2. Having overvoltage on the wire: I am not particularly worried about the wire itself, but do check to see what voltage rating is imprinted on the cable and wire you are using
3. Connectors: 120vac connectors are rated for and certified for 120vac. I have no idea what their actual operating upper voltage capability is or what overvoltage testing they undergo as part of the certification process. Although I have successfully temporarily used 120vac connectors on 240vac and see the construction inside looks little different between them, I can't recommend doing that.
For this reason, I had suggested that you standardize on NEMA L6-20 (or simply 6-20 straight pin) for all your interconnects.