54.9-E1)    With Guard Arm Below Conductors of 750-22,500 Volts:  The vertical clearance between the top conductor in a rack group and conductors of 750-22,500 volts at the next conductor level above, may be less than 6 feet but shall be not less than 4 feet.  If a clearance of less than 6 feet is used, all of the following requirements:

A wood guard arm not less than 48 inches long shall be installed directly above and parallel to the top line conductor of such a rack group;

Conductors in such a rack group, which are so guarded, shall not be attached to more than one side (there being four sides) of any pole; and

No service drop conductors supported on such rack shall pass between the surface of pole and the vertical plane of the line conductors.  Any service drop conductors attached to and supported by the line conductors shall have a clearance of not less than 15 inches from surface of pole.  (See App. G, Fig 43.)

Each guard arm and its pole attachments are required by Rule 46 to withstand a vertical load of 200 pounds at either end.

54.9-E1)    With Guard Arm Below Conductors of 750-22,500 Volts:  The vertical clearance between the top conductor in a rack group and conductors of 750-22,500 volts at the next conductor level above, may be less than 6 feet but shall be not less than 4 feet.  If a clearance of less than 6 feet is used, all of the following requirements:

A wood guard arm not less than 48 inches long shall be installed directly above and parallel to the top line conductor of such a rack group; or where the conductor of a rack group dead-ends, the guard arm may be placed above the rack at a right angle to the line conductor, provided that no service drop conductor attached to a rack so guarded makes a horizontal angle greater than 90 degrees with the vertical plane of the line conductors;

Conductors in such a rack group, which are so guarded, shall not be attached to more than one side (there being four sides) of any pole; and

No service drop conductors supported on such a rack with the guard arm installed directly above and approximately parallel to the top line conductor of a rack group shall pass between the surface of pole and the vertical plane of the line conductors.  Any service drop conductors attached to and supported by the line conductors shall have a clearance of not less than 15 inches from surface of pole.  (See App. G, Fig 43.)

Each guard arm and its pole attachments are required by Rule 46 to withstand a vertical load of 200 pounds at either end.
 

54.9-E1)    With Guard Arm Below Conductors of 750-22,500 Volts:  The vertical clearance between the top conductor in a rack group and conductors of 750-22,500 volts at the next conductor level above, may be less than 6 feet but shall be not less than 4 feet.  If a clearance of less than 6 feet is used, all of the following requirements:

A wood guard arm not less than 48 inches long shall be installed directly above and parallel to the top line conductor of such a rack group; or where the conductor of a rack group dead-ends, the guard arm may be placed above the rack at a right angle to the line conductor, provided that no service drop conductor attached to a rack so guarded makes a horizontal angle greater than 90 degrees with the vertical plane of the line conductors;

Conductors in such a rack group, which are so guarded, shall not be attached to more than one side (there being four sides) of any pole; and

No service drop conductors supported on a rack with the guard arm installed directly above and approximately parallel to the top line conductor of a rack group shall pass between the surface of pole and the vertical plane of the line conductors.  Any service drop conductors attached to and supported by the line conductors shall have a clearance of not less than 15 inches from surface of pole.  (See App. G, Fig 43.)

Each guard arm and its pole attachments are required by Rule 46 to withstand a vertical load of 200 pounds at either end.