Standards are standards are standards. The tell what SHOULD happen.
In practice standards rarely happen. Just like the people that write them are unlikely to design a network distribution system or wire a switchboard or connect a consumer mains.
After 15 years in electrical engineering design and writing electrical specs for drive ins and hardtops, I know for sure my left one is safe.
It's called the school of hard knocks.:headbang:
Col do you have a meter? and I really hope you live at the end of the line somewhere.