Our GC refered us to a customer of his that said she received a shock while trying to replace a broken lens on an outside luminaire. I have been twice and found no shock, exposed/bare conductors, or loose ground. My initial thought was maybe neutral current was jumping to grounding wire somehow but I have found no evidence. We have pulled off for now because of the old adage "you can't fix what isn't broke" and GC is not yet ready to authorize hours of troubleshooting for a currently (pun not intended )non-existent problem. Any ideas on what I may be missing?