Re: isolation transformers
engy: Don and I have been kicking this dead horse around for over three years now.
Don is correct in his statements. They are in line with the handbook and Soares Grounding Book.
My statements are in line with technical documentation in the NEC definitions and history of the origin of the term "Separately Derived System".
I was working in the trade in 1956 when the words were changed from "Electrical Systems Without External Connections" to Separately Derived Systems".
Check out the 1947 Handbook.
The diagrams in the Soares Book are indicating the neutral is multi-grounded. This is my complaint. The reason for a separately derived system is to eliminate the multi-point grounding within the premises.
engy: Don and I have been kicking this dead horse around for over three years now.
Don is correct in his statements. They are in line with the handbook and Soares Grounding Book.
My statements are in line with technical documentation in the NEC definitions and history of the origin of the term "Separately Derived System".
I was working in the trade in 1956 when the words were changed from "Electrical Systems Without External Connections" to Separately Derived Systems".
Check out the 1947 Handbook.
The diagrams in the Soares Book are indicating the neutral is multi-grounded. This is my complaint. The reason for a separately derived system is to eliminate the multi-point grounding within the premises.