Problem with electric hook up in France. Sometimes when l hook up in a site or Aire in France l end up with the power box in my Accent showing a red light for reverse polarity so no electric. The next night on say another site it works ok but then may fail on another site visit a day or two later. In one of mymany handbooks namely Go Motorhoming (Vicarious Books) they suggest that Reverse polarity is common in France'.....and that 'Reverse polarity will not damage your motorhome electrical systems, appliances etc'. How does that comment sit with fellow and knowledgeable motorhome owners on this site please?