Original Version
Rule 59.4-C
59.4-C. Transformers
Ground conductors of Transformers on common neutral systems
shall conform to the requirements of Rule 59.4-A1.
On common neutral systems, each transformer installation on a branch circuit
without a loop return shall be so located that there will be one or more
metallic water pipe systems grounds of a resistance not greater than 3 ½
ohms on each side of the transformers installation.
A transformer installation located on a grid section of a common neutral
system requires no independent ground provided that there is a ground connection,
having a resistance not in excess of 3 ½ ohms, to the common neutral
line conductor either at the transformer pole or at an adjacent pole.
Strikeout and Underline Version
Rule 59.4-C
59.4-C. Transformers
Ground conductors of Transformers on common neutral systems
shall conform to the requirements of Rule 59.4-A1.
On common neutral systems, each transformer installation on a branch circuit
without a loop return shall be so located that there will be not less
than one or more metallic water pipe systems grounds
ground of a resistance not greater than 3 ½ ohms on each side
of the transformers installation.
A transformer installation located on a grid section of a common neutral
system requires no independent ground provided that there is a ground connection,
having a resistance not in excess of 3 ½ ohms, to the common neutral
line conductor either at the transformer pole or at an adjacent pole.
Final version
Rule 59.4-C
59.4-C. Transformers
Ground conductors of Transformers on common neutral
systems shall conform to the requirements of Rule 59.4-A1.
On common neutral systems, each transformer installation on a branch circuit
without a loop return shall be so located that there will be not less than
one ground of a resistance not greater than 3 ½ ohms on each side
of the transformers installation.
A transformer installation located on a grid section of a common neutral
system requires no independent ground provided that there is a ground connection,
having a resistance not in excess of 3 ½ ohms, to the common neutral
line conductor either at the transformer pole or at an adjacent pole.