Original Version
Rule 33.3-B
33.3-B. Independent Ground Connections
Ground connections for equipment of anyone of the types
listed in Rule
33.3-A
shall not be interconnected with ground connections for equipment of any
other type listed therein, EXCEPT:
In common neutral systems the neutral conductors of
750 volt supply circuits and of supply circuits of 750- 22,500 volts may
be interconnected and grounded in accordance with the provisions of
Rule 59
; and
A ground connection for a set of lightning arresters
may be interconnected with:
A ground connection for the neutral conductor of
the circuit protected by the set of lightning arresters,
The cable sheath or body of the cable pothead
where the cable conductors are connected to the circuit protected by the
set of lightning arresters,
Metallic conduit enclosing conductors of the
circuit protected by the set of lightning arresters,
Transformer cases grounded in accordance
with
Rule 58.2-A
where the transformers are connected to the circuit protected by the set
of lightning arresters, and
The ground connection of another set of
lightning arresters, provided the circuits protected are of the same voltage
classification.
Where more than two sets of lightning
arresters on supply circuits of the same voltage classification are installed
on a pole or structure, and their ground terminals are interconnected at
the top of the ground connections, two complete and effective ground connections
will be considered sufficient for the purpose of this rule. Connection to
an effectively grounded cable sheath or conduit of a circuit protected by
the lightning arresters will be considered as one of these two effective
ground connections.
Strikeout
and Underline Version
Rule 33.3-B
33.3-B. Independent Ground Connections
Ground connections for equipment
of anyone of the types listed in
Rule 33.3-A
shall not be interconnected with ground connections for equipment of any
other type listed therein, EXCEPT:
In common neutral systems
the neutral conductors of 750 volt supply circuits and of supply circuits
of 750- 22,500 volts may be interconnected and grounded in accordance with
the provisions of
Rule 59
; and
A ground connection for
a set of lightning arresters may be interconnected with:
A ground connection for
the neutral conductor of the circuit protected by the set of lightning arresters,
A ground connection
for the neutral conductor of a dedicated transformer and associated equipment
cases solely for the purpose of providing power to operate electric utility
supply equipment,
The cable sheath
or body of the cable pothead where the cable conductors are connected to
the circuit protected by the set of lightning arresters,
Metallic conduit
enclosing conductors of the circuit protected by the set of lightning arresters,
Transformer cases
grounded in accordance with
Rule 58.2-A
where the transformers are connected to the circuit protected by the set
of lightning arresters, and
The ground
connection of another set of lightning arresters, provided the circuits protected
are of the same voltage classification.
Where more
than two sets of lightning arresters on supply circuits of the same voltage
classification are installed on a pole or structure, and their ground terminals
are interconnected at the top of the ground connections, two complete and
effective ground connections will be considered sufficient for the purpose
of this rule. Connection to an effectively grounded cable sheath or conduit
of a circuit protected by the lightning arresters will be considered as
one of these two effective ground connections.
Final Version
Rule 33.3-B
33.3-B. Independent Ground Connections
Ground connections for equipment of anyone of the types listed in Rule 33.3-A
shall not be interconnected with ground connections for equipment of any
other type listed therein, EXCEPT:
In common neutral systems the neutral conductors of 750 volt supply circuits
and of supply circuits of 750- 22,500 volts may be interconnected and grounded
in accordance with the provisions of
Rule 59; and
A ground connection for a set of lightning arresters may be interconnected
with:
A ground connection for the neutral conductor of the circuit protected
by the set of lightning arresters,
A ground connection for the neutral conductor of a dedicated transformer
and associated equipment cases solely for the purpose of providing power
to operate electric utility supply equipment,
The cable sheath or body of the cable pothead where the cable conductors
are connected to the circuit protected by the set of lightning arresters,
Metallic conduit enclosing conductors of the circuit protected by the set
of lightning arresters,
Transformer cases grounded in accordance with
Rule
58.2-A
where the transformers are connected to the circuit protected by the set
of lightning arresters, and
The ground connection of another set of lightning arresters, provided the
circuits protected are of the same voltage classification.
Where more than two sets of lightning arresters on supply circuits of the same voltage classification are installed on a pole or structure, and their ground terminals are interconnected at the top of the ground connections, two complete and effective ground connections will be considered sufficient for the purpose of this rule. Connection to an effectively grounded cable sheath or conduit of a circuit protected by the lightning arresters will be considered as one of these two effective ground connections.