Here's another of my favorite "forbidden" listed product: The Edison-base circuit breaker:

http://www.cooperindustries.com/con...al/edison_base_rejectionplugfuse/mb.html

This breaker is perfectly legal to use in place of a fuse. That's where the sanity ends.

You see, folks get all wrapped up around some code language relating to FUSES, and quibble that these breakers do not have "type S" bases. They also overlook the code stipulation "where there is EVIDENCE of over-FUSING. No, the assertion is made that the old fuse box must either be filled with type S fuses 'just because,' or be completely replaced.

Even the Bussman rep seemed surprised that his company sold these things, and wasn't sure if they were legal to use in a residential fuse box. Hell, that's exactly the use for which Mechanical Products (the actual manufacturer) intended!