Change List for this Rule

 

Original Version

Rule 57.7

 

57.7    Use of Guard Arms and Coverings

 

Any guard arm which is required to be installed by the provisions of Rule 57.4-F shall be at least 4 feet in length (Rule 20.9-D) and parallel to and not more than 4 inches above the top of the cable or messenger.  In lieu of the guard arm, suitable protective covering of wood at least 4 feet in length may be placed around the cable and messenger.

 

Double guard arms shall be used where such a messenger or cable is dead ended on or wrapped around a wood pole, at a vertical separation of less than 6 feet below unprotected supply conductors of other circuits of 750 volts or less. Portions of cables which take the form of a riser or a grounded lateral or vertical run shall be covered as specified in Rule 54.6-E for risers.

 

Strikeout and Underline Version

Rule 57.7

 

57.7    Use of Guard Arms and Coverings

 

Any guard arm which is required to be installed by the provisions of Rule 57.4-F shall be at least 4 feet in length (Rule 20.9-D) and parallel to and not more than 4 inches above the top of the cable or messenger.  In lieu of the guard arm, suitable protective covering of wood (Rule 22.2) at least 4 feet in length may be placed around the cable and messenger.

 

Double guard arms shall be used where such a messenger or cable is dead ended on or wrapped around a wood pole, at a vertical separation of less than 6 feet below unprotected supply conductors of other circuits of 750 volts or less. Portions of cables which take the form of a riser or a grounded lateral or vertical run shall be covered as specified in Rule 54.6-E for risers.

 

Final Version

Rule 57.7

 

57.7    Use of Guard Arms and Coverings

 

Any guard arm which is required to be installed by the provisions of Rule 57.4-F shall be at least 4 feet in length (Rule 20.9-D) and parallel to and not more than 4 inches above the top of the cable or messenger.  In lieu of the guard arm, suitable protective covering (Rule 22.2) at least 4 feet in length may be placed around the cable and messenger.

 

Double guard arms shall be used where such a messenger or cable is dead ended on or wrapped around a wood pole, at a vertical separation of less than 6 feet below unprotected supply conductors of other circuits of 750 volts or less. Portions of cables which take the form of a riser or a grounded lateral or vertical run shall be covered as specified in Rule 54.6-E for risers.