Presently in NEC section 230.95 and 240.13 there is a requirement to have ground fault protection on 1000+ amp mains for; service disconnects, and building or structure main disconnecting means, respectively. The section in 240.13 first appeared in the 1990 code. I know that the section in 230.95 was in the code as far back as 1981. Does anyone know in what NEC version the section in 230.95 first appeared?