Gerry Beaumont recommended this document as required reading for home inspectors. He based one of his “Questions of the Day” on information found in this document. The link was lost and perhaps posted elsewhere on this forum, but I felt it needed posted again.
An excellent read and very educational regarding electrical history and the study of aged components:
Residential Electrical System
Aging Research Project
Technical Report
July 1, 2008
Prepared by:
David A. Dini, P.E.
Underwriters Laboratories Inc.
© 2008
http://www.nfpa.org/assets/files//PDF/Research/RESAReport.pdf