Change List for this Rule

 

Original Version

Rule 54.4-A

 

54.4-A.    Above Ground

 

(1)    Across Arid or Mountainous Areas: Across arid or mountainous areas supply circuits carrying 22,500-30,000 volts, inclusive, may have a clearance of less than 30 feet (Table 1, Case 4, Column F) but not less than 25 feet above ground subject to a reduction of not more than 10 per cent because of temperature and loading as specified in Rule 43.  Upon special permission from the Rail Road Commission, a minimum clearance of 25 feet above ground may be applied in similar areas to circuits in excess of 30,000 volts, not including Class E circuits.  For circuits in excess of 30,000 volts, in which case no reduction of the 25 feet will be permitted for conditions less than maximum loadings or temperature specified in Rules 43.1 and 43.2.

 

(2)    In Rural Districts, Conductors of 750-20,000 Volts:

 

a)    Crossing Roads or Driveways: In rural districts the minimum clearance of 25 feet specified in Table 1, Case 3 Column E may be reduced to 22 feet above ground for conductors not exceeding 20,000 volts crossing or overhanging traversable portions of public or private roads or driveways.  This modified minimum clearance of 22 feet shall in no case be reduced because of temperature or loading at conditions less than the maximum loading or temperature specified in Rules 43.1 and 43.2.

 

b)    Above Agricultural Areas Along Roads:  In rural districts the minimum clearance of 25 feet specified in Table 1, Case 4 Column E may be reduced to 18 feet above ground for lines not exceeding 20,000 volts across areas capable of being traversed by agricultural equipment and along roads where no part of the line overhangs any traversable portion of a public or private roadway.  This modified minimum clearance of 18 feet shall in no case be reduced because of temperature or loading at conditions less than maximum loadings or temperature specified in Rules 43.1 and 43.2.  Care should be exercised in using this minimum clearance along roads, above or along ditches where mechanical devices are used for maintenance, near trees in orchards, near trees or structures which can be climbed and in other similar situations.

 

(3)     Lead Wires for Transformers:  Transformer lead wires shall have clearances above ground as specified in Table 1 except as modified by the provisions of Rule 58.3-B1a.

 

(4)    Over swimming Pools: (see Fig. 54-1) Installations of conductors. service drops and guys over swimming pools shall be avoided where practicable. Where line conductors. service drop conductors or guys are installed over swimming pools the following rules apply:

 

a)    Line Conductors: Where unprotected line conductors are installed over a swimming pool they shall have radial clearances from the top edge of the swimming pool walls and vertical clearances above the highest water level of the pool surface not less than the following:

 

1) 0 - 750 Volts

20 feet

2) 750 - 22,500 Volts

25 feet

3) 22.5 - 300 kV

30 feet

 

(See Table 1, Case 3, Columns D, E and F )

 

b)    Service Drops 0 - 750 Volts: Where service drop conductors are installed over a swimming pool:

 

1)    Phase conductors shall be suitably insulated (see Rule 20.8G ).

 

2)    Vertical clearances above the highest water level of the pool surface and radial clearances from the top edge of the pool wall shall be:

 

a)    16 feet for public and commercially operated pools.

b)    12 feet for residential pools.

 

3)    No service drop may be installed less than 16 feet vertically above the horizontal plane through a diving board or platform, such plane being the area within 8 feet radially of the diving board or platform that is over the water surface of the pool.

 

4)    No service drop may be installed less than 12 feet vertically above the horizontal plane through a diving board or platform, such plane being the area within 3 feet radially of the diving board or platform that is not over the water surface of the pool.

 

c)    Ungrounded Portions of Guys:

 

1)    Shall have radial clearances from the top edge of the swimming pool wall of not less than 18 feet.

 

2)    Shall have vertical clearances above the highest water level of the pool surface of not less than 18 feet.

 

3)    Shall not be installed less than 18 feet vertically above the horizontal plane through a diving board or platform, such plane being the area within 8 feet radially of the diving board or platform that is over the water surface of the pool.

 

4)    Shall not be installed less than 12 feet vertically above the horizontal plane through a diving board or platform, such plane being the area within 6 feet radially of the diving board or platform that is not over the water surface of the pool.

 

d)    Grounded Portions of Guys:

 

1)    Shall have vertical clearances above the highest water level of the pool surface of not less than 16 feet.

 

2)    Shall not be installed less than 16 feet vertically above the horizontal plane through a diving board or platform, such plane being the area within 8 feet radially of the diving board or platform that is over the water surface of the pool.

 

3)    Shall not be installed less than 8 feet vertically above the horizontal plane through a diving board or platform, such plane being the area within 3 feet radially of the diving board or platform that is not over the water surface of the pool.

 

 

Minimum Vertical and Radial Clearances over Swimming Pools

A
Minimum
Vertical

B
Minimum
Radial

Unprotected Line Conductors (Vertical Over Highest Water Level and Radial from Top Edge of Pool Walls)

 

 

1. 0 - 750 Volts

20 Feet

20 Feet

2. 750 - 22,500 Volts

25 Feet

25 Feet

3. 22.5 - 300 kV

30 Feet

30 Feet

Service Drops (Vertical Over Highest Water Level and Radial from Top Edge of Pool Walls

 

 

4. Pools Public and Commercial

16 Feet

16 Feet

5. Pools Residential

12 Feet

12 Feet

Service Drops (Over Diving Boards or Platforms)

 

 

6. Portion of Board or Platform That is Over Water Surface

16 Feet

8 Feet

7. Portion of Board or Platform That is not Over Water Surface

12 Feet

3 Feet

Guys (Ungrounded Portions)

 

 

8. Over Highest Water Level and from Top Edge of Pool Walls

18 Feet

18 Feet

9. Over Diving Board or Platform (The Portion that is Over the Water Surface)

18 Feet

8 Feet

10. Over Diving Board or Platform (The Portion that is not Over the Water Surface)

12 Feet

6 Feet

Guys (Grounded Portions)

 

 

11. Over the Highest Water Level

16 Feet

12. Over Diving Board or Platform (The Portion that is Over the Water Surface)

16 Feet

8 Feet

13. Over Diving Board or Platform (The Portion that is not Over the Water Surface)

8 Feet

3 Feet

Clearance Over Swimming Pools
Figure 541

 

Strikeout and Underline Version

Rule 54.4-A

 

54.4-A.    Above Ground

 

(1)    Across Arid or Mountainous Areas: Across arid or mountainous areas supply circuits carrying 22,500-30,000 volts, inclusive, may have a clearance of less than 30 feet (Table 1, Case 4, Column F) but not less than 25 feet above ground subject to a reduction of not more than 10 per cent because of temperature and loading as specified in Rule 43.  Upon special permission from the Rail Road Commission, a minimum clearance of 25 feet above ground may be applied in similar areas to circuits in excess of 30,000 volts, not including Class E circuits.  For circuits in excess of 30,000 volts, in which case no reduction of the 25 feet will be permitted for conditions less than maximum loadings or temperature specified in Rules 43.1 and 43.2.

 

(2)    In Rural Districts, Conductors of 750-20,000 Volts:

 

a)    Crossing Roads or Driveways: In rural districts the minimum clearance of 25 feet specified in Table 1, Case 3 Column E may be reduced to 22 feet above ground for conductors not exceeding 20,000 volts crossing or overhanging traversable portions of public or private roads or driveways.  This modified minimum clearance of 22 feet shall in no case be reduced because of temperature or loading at conditions less than the maximum loading or temperature specified in Rules 43.1 and 43.2.

 

b    Above Agricultural Areas Along Roads:  In rural districts the minimum clearance of 25 feet specified in Table 1, Case 4 Column E may be reduced to 18 feet above ground for lines not exceeding 20,000 volts across areas capable of being traversed by agricultural equipment and along roads where no part of the line overhangs any traversable portion of a public or private roadway.  This modified minimum clearance of 18 feet shall in no case be reduced because of temperature or loading at conditions less than maximum loadings or temperature specified in Rules 43.1 and 43.2.  Care should be exercised in using this minimum clearance along roads, above or along ditches where mechanical devices are used for maintenance, near trees in orchards, near trees or structures which can be climbed and in other similar situations.

 

(32)    Lead Wires for Transformers:  Transformer lead wires shall have clearances above ground as specified in Table 1 except as modified by the provisions of Rule 58.3-B1a.

 

(43)    Over swimming Pools: (see Fig. 54-1) Installations of conductors. service drops and guys over swimming pools shall be avoided where practicable. Where line conductors. service drop conductors or guys are installed over swimming pools the following rules apply:

 

a)    Line Conductors: Where unprotected line conductors are installed over a swimming pool they shall have radial clearances from the top edge of the swimming pool walls and vertical clearances above the highest water level of the pool surface not less than the following:

  

1) 0 - 750 Volts

20 feet

2) 750 - 22,500 Volts

25 feet

3) 22.5 - 300 kV

30 feet

 

(See Table 1, Case 3, Columns D, E and F )

 

b)    Service Drops 0 - 750 Volts: Where service drop conductors are installed over a swimming pool:

 

1)    Phase conductors shall be suitably insulated (see Rule 20.8-G ).

 

2)    Vertical clearances above the highest water level of the pool surface and radial clearances from the top edge of the pool wall shall be:

 

a)    16 feet for public and commercially operated pools.

b)    2 feet for residential pools.

 

3)    No service drop may be installed less than 16 feet vertically above the horizontal plane through a diving board or platform, such plane being the area within 8 feet radially of the diving board or platform that is over the water surface of the pool.

 

4)    No service drop may be installed less than 12 feet vertically above the horizontal plane through a diving board or platform, such plane being the area within 3 feet radially of the diving board or platform that is not over the water surface of the pool.

 

c)    Ungrounded Portions of Guys:

 

1)    Shall have radial clearances from the top edge of the swimming pool wall of not less than 18 feet.

 

2)    Shall have vertical clearances above the highest water level of the pool surface of not less than 18 feet.

 

3)    Shall not be installed less than 18 feet vertically above the horizontal plane through a diving board or platform, such plane being the area within 8 feet radially of the diving board or platform that is over the water surface of the pool.

 

4)    Shall not be installed less than 12 feet vertically above the horizontal plane through a diving board or platform, such plane being the area within 6 feet radially of the diving board or platform that is not over the water surface of the pool.

 

d)    Grounded Portions of Guys:

 

1)    Shall have vertical clearances above the highest water level of the pool surface of not less than 16 feet.

 

2)    Shall not be installed less than 16 feet vertically above the horizontal plane through a diving board or platform, such plane being the area within 8 feet radially of the diving board or platform that is over the water surface of the pool.

 

3)    Shall not be installed less than 8 feet vertically above the horizontal plane through a diving board or platform, such plane being the area within 3 feet radially of the diving board or platform that is not over the water surface of the pool.

 

 

Minimum Vertical and Radial Clearances over Swimming Pools

A
Minimum
Vertical

B
Minimum
Radial

Unprotected Line Conductors (Vertical Over Highest Water Level and Radial from Top Edge of Pool Walls)

 

 

1. 0 - 750 Volts

20 Feet

20 Feet

2. 750 - 22,500 Volts

25 Feet

25 Feet

3. 22.5 - 300 kV

30 Feet

30 Feet

Service Drops (Vertical Over Highest Water Level and Radial from Top Edge of Pool Walls

 

 

4. Pools Public and Commercial

16 Feet

16 Feet

5. Pools Residential

12 Feet

12 Feet

Service Drops (Over Diving Boards or Platforms)

 

 

6. Portion of Board or Platform That is Over Water Surface

16 Feet

8 Feet

7. Portion of Board or Platform That is not Over Water Surface

12 Feet

3 Feet

Guys (Ungrounded Portions)

 

 

8. Over Highest Water Level and from Top Edge of Pool Walls

18 Feet

18 Feet

9. Over Diving Board or Platform (The Portion that is Over the Water Surface)

18 Feet

8 Feet

10. Over Diving Board or Platform (The Portion that is not Over the Water Surface)

12 Feet

6 Feet

Guys (Grounded Portions)

 

 

11. Over the Highest Water Level

16 Feet

12. Over Diving Board or Platform (The Portion that is Over the Water Surface)

16 Feet

8 Feet

13. Over Diving Board or Platform (The Portion that is not Over the Water Surface)

8 Feet

3 Feet

Clearance Over Swimming Pools
Figure 541

 

Final Version

Rule 54.4-A

 

54.4-A.    Above Ground

 

(1)    Across Arid or Mountainous Areas: Across arid or mountainous areas supply circuits carrying 22,500-30,000 volts, inclusive, may have a clearance of less than 30 feet (Table 1, Case 4, Column F) but not less than 25 feet above ground subject to a reduction of not more than 10 per cent because of temperature and loading as specified in Rule 43.  Upon special permission from the Rail Road Commission, a minimum clearance of 25 feet above ground may be applied in similar areas to circuits in excess of 30,000 volts, not including Class E circuits.  For circuits in excess of 30,000 volts, in which case no reduction of the 25 feet will be permitted for conditions less than maximum loadings or temperature specified in Rules 43.1 and 43.2.

 

(2)    Lead Wires for Transformers:  Transformer lead wires shall have clearances above ground as specified in Table 1 except as modified by the provisions of Rule 58.3-B1a.

 

(3)    Over swimming Pools: (see Fig. 54-1) Installations of conductors. service drops and guys over swimming pools shall be avoided where practicable. Where line conductors. service drop conductors or guys are installed over swimming pools the following rules apply:

 

a)    Line Conductors: Where unprotected line conductors are installed over a swimming pool they shall have radial clearances from the top edge of the swimming pool walls and vertical clearances above the highest water level of the pool surface not less than the following:

 

 

1) 0 - 750 Volts

20 feet

2) 750 - 22,500 Volts

25 feet

3) 22.5 - 300 kV

30 feet

 

(See Table 1, Case 3, Columns D, E and F )

 

b)    Service Drops 0 - 750 Volts: Where service drop conductors are installed over a swimming pool:

 

1)    Phase conductors shall be suitably insulated (see Rule 20.8G ).

 

2)    Vertical clearances above the highest water level of the pool surface and radial clearances from the top edge of the pool wall shall be:

 

a)    16 feet for public and commercially operated pools.

b)    12 feet for residential pools.

 

3)    No service drop may be installed less than 16 feet vertically above the horizontal plane through a diving board or platform, such plane being the area within 8 feet radially of the diving board or platform that is over the water surface of the pool.

 

4)    No service drop may be installed less than 12 feet vertically above the horizontal plane through a diving board or platform, such plane being the area within 3 feet radially of the diving board or platform that is not over the water surface of the pool.

 

c)    Ungrounded Portions of Guys:

 

1)    Shall have radial clearances from the top edge of the swimming pool wall of not less than 18 feet.

 

2)    Shall have vertical clearances above the highest water level of the pool surface of not less than 18 feet.

 

3)    Shall not be installed less than 18 feet vertically above the horizontal plane through a diving board or platform, such plane being the area within 8 feet radially of the diving board or platform that is over the water surface of the pool.

 

4)    Shall not be installed less than 12 feet vertically above the horizontal plane through a diving board or platform, such plane being the area within 6 feet radially of the diving board or platform that is not over the water surface of the pool.

 

d)    Grounded Portions of Guys:

 

1)    Shall have vertical clearances above the highest water level of the pool surface of not less than 16 feet.

 

2)    Shall not be installed less than 16 feet vertically above the horizontal plane through a diving board or platform, such plane being the area within 8 feet radially of the diving board or platform that is over the water surface of the pool.

 

3)    Shall not be installed less than 8 feet vertically above the horizontal plane through a diving board or platform, such plane being the area within 3 feet radially of the diving board or platform that is not over the water surface of the pool.

 

 

Minimum Vertical and Radial Clearances over Swimming Pools

A
Minimum
Vertical

B
Minimum
Radial

Unprotected Line Conductors (Vertical Over Highest Water Level and Radial from Top Edge of Pool Walls)

 

 

1. 0 - 750 Volts

20 Feet

20 Feet

2. 750 - 22,500 Volts

25 Feet

25 Feet

3. 22.5 - 300 kV

30 Feet

30 Feet

Service Drops (Vertical Over Highest Water Level and Radial from Top Edge of Pool Walls

 

 

4. Pools Public and Commercial

16 Feet

16 Feet

5. Pools Residential

12 Feet

12 Feet

Service Drops (Over Diving Boards or Platforms)

 

 

6. Portion of Board or Platform That is Over Water Surface

16 Feet

8 Feet

7. Portion of Board or Platform That is not Over Water Surface

12 Feet

3 Feet

Guys (Ungrounded Portions)

 

 

8. Over Highest Water Level and from Top Edge of Pool Walls

18 Feet

18 Feet

9. Over Diving Board or Platform (The Portion that is Over the Water Surface)

18 Feet

8 Feet

10. Over Diving Board or Platform (The Portion that is not Over the Water Surface)

12 Feet

6 Feet

Guys (Grounded Portions)

 

 

11. Over the Highest Water Level

16 Feet

12. Over Diving Board or Platform (The Portion that is Over the Water Surface)

16 Feet

8 Feet

13. Over Diving Board or Platform (The Portion that is not Over the Water Surface)

8 Feet

3 Feet

Clearance Over Swimming Pools
Figure 541