WDeanN wrote:
The two codes are not exclusionary, so that using the 70E does not exempt someone from using the NEC, and vice-versa.
My concern though, is that all of these signs and postings become so much background noise that they become ignored.
They end up getting posted anyway to try to cover liability issues, similar to the "Caution, coffee is Hot" signs now at McDonald's, but are ignored by the majority of the people.
We're already running into this at my facility. We have signs posted by the Safety department that say "Danger - High Voltage - Authorized personnel only" Then there's a label with nameplate and source information. There is also manufacturer's information (size and ratings) Now there is also a label with arc flash information.
All for a 480V / 30A pump disconnect!
The definition of "High Voltage" certainly can be debated with the context, but it seems to me that posting such a sign at a disconnect enclosing circuits not exceeding 600 volts only adds to the sign clutter you and I both dislike.
If you save those warnings for only equipment operating at over 600 volts workers will believe them more readily.