[flybouy]

When it comes to wire there are 2 ratings that are controled by 2 different factors. 1. is amp rating which is controled by the conductor size, the smaller the guage ( which means a larger conductor, just like a 12 guage shotgun shell is larger than a 16 guage) And 2 the voltage rating that is controlled by the insulation surrounding the conductor(s). With that being said, it could be a matter of how it was advertised as by the label they are both UL listed either on is fine. Now my question. Why 2 extension cables? If you are planning on using both with the cable that came with the camper then you may have a problem as 30 amp via a #10 wire is good for a maximum of 50 feet. If your extending that cable to 75' then you need to go one conductor size larger.