I do pre-approvals for kiosk designs going into Malls. One inspector from Wisconsin has stated that the s/o cord from the main panel-box to the floor receptacle is in violation of NEC400.8. Not having a code book, I'm not certain why he has brought this up. This is a temporary unit. I didn't design this unit, and our installers have never had this issue raised with them before. What specifically does 400.8 refer to, and what possible violation could he be referring to ?