Change List for this Rule

 

General Order 95

 

Section V

 

Detailed Construction Requirements for Supply Lines
(Class H, L and T Circuits)

 

53.4    Bonding

Bonding is not required by these rules. Bonding is not recommended for circuits of 7,500 volts or less but it is recognized that under certain conditions it may be deemed necessary.

Where bonding is used the bond wire or strap shall have a conductivity of not less than No. 10 AWG copper wire, shall in no case be installed on the top surface of any crossarm, and the bonding shall comply with the following requirements:

 

A.    Circuits of More than 7,500 Volts

 

(1)    At Top of Pole:

 

a)    Single Circuit: The bond wire of a single circuit in horizontal, triangular or vertical configuration at the top circuit position of the pole may be installed on the face, back or underside of wood crossarms and on the surface of pole without a protective covering. Crossarm braces may be connected to such bond wire only where positive electrical contact is made and the brace is not less than 3 feet vertically above the next conductor level below the top circuit.

 

b)    More than One Circuit: The bonding of any circuit where more than one circuit is installed at the top position of a pole shall be in accordance with the provision of Rule 53.4A3 below.

 

Note:    Revised October 9, 1996 by Resolution SU40.

 

(2)    Below Top of Pole: Bond wires of any circuit below the top circuit position of the pole in horizontal, triangular or vertical configuration may be installed on the face, back or underside of wood crossarms and on the surface of pole without a protective covering. Unbonded metal pole line hardware shall clear such bond wires by not less than 1.5 inches (see Rules 52.7B1 and 52.7C ).

 

Note:    Revised September 18, 1967 by Decision No. 72984 and October 9, 1996 by Resolution SU40.

 

(3)    Conductors of More than One Circuit at Same Level: Where conductors of more than one circuit are at the same level, in horizontal, triangular or vertical configuration, bond wire may be installed on the face, back or underside of wood crossarms and on the surface of pole without a protective covering. Unbonded metal pole line hardware shall clear such bond wires by not less than 1.5 inches (see Rules 52.7B1 and 52.7C) .

 

Note:    Revised September 18, 1967 by Decision No. 72984 and October 9, 1996 by Resolution SU40.

 

a)    Separately Bonded Circuits: Where conductors of not more than two circuits are at the same level and separately bonded, such bond wires shall be separated on the crossarm and on the surface of the pole by not less than 6 inches.

 

Note:    Revised September 18, 1967 by Decision No. 72984 and January 21,1992, by Resolution SU10.

 

b)    Hardware Bond Wires: Where work is to be performed at such locations, the grounding of hardware bond wires shall be in accordance with Rule 52.7F .

 

Note:    Revised January 21,1992, by Resolution SU10.

 

B.    Circuits of 7,500 Volts or Less

The bonding of circuits of 7,500 volts or less shall comply with the following:

 

Bond wires shall not be less than 1.5 inches from metal braces and all other hardware except the metal pins and dead ends which are bonded; and

Bond wire of separate circuits shall be separated on crossarms and poles by not less than 3 inches.

 

Note:    Revised January 21,1992, by Resolution SU10 and October 9, 1996 by Resolution SU40.