I'm just finalising installing a ratmat Link

Now I understand the basics of how and why high voltage arcing happens . The ratmat tiles are put together a bit like a jigsaw with contacts between tiles – a bit of a pain as it goes to get them all going together without some trying to bend up as the tile is fitted but practice gets that done. I ran a continuity check on each junction before and after screwing down (just using the buzzer function of a tester). the most common arcing happens where there is an under/over rail most easily solved by placng a slip of plastic between.

The question is that at when down to just 2 or 3 points arcing they were doing so rhythmically as in point A would arc twice then be silent as point B arced three times and then repeat to A … I would have expected that to be random?

(Oh, and the reason for the Ratmat is that the beggars ate my expensive car to the tune of several £K repairs – probably 'cos when charging it becomes nice and cosy warm and keeping rats away from a farm yard backing on to woodland is nigh impossible..)