According to these guys, it was first mentioned in NEC as a recommendation in 1903, and first made a code requirement in 1913.How long has it been NEC mandated for residential services to have one conductor grounded?
This IS a back thread. Just like every other thread these days it seems.For the longest time, Services... and everything about them... was per the Poco.
It didn't hit EUSERC until 1945 -- and fatalities with the Brothers -- that they realized grounding was really an issue.
You can look through the back threads , but EUSERC got started when war plant were killing the Brothers.
Yes, it's that basic.
It, the fiasco, was a learning experience for EVERY Electrical Engineer.
Yes, they had a massive con-fab over the fatality.
It was only after the confab that EUSERC was founded...
With SCE at the head of the list.
PG&E right along side.
EUSERC has spread across all of the Western States.
At a fundamental basis: EUSERC demonizes ungrounded Services.
You can get such a Service -- but ONLY upon application.
( Paper mills, chemical plants, etc. )