Change List for this Rule

 

Original Version

Table 2A

 

Minimum Clearances of Wires from Signs Mounted on Buildings and Isolated Structures A

 

Case
No.

Nature of Clearance Type of Sign

A
Span Wires (Other than Trolley Span Wires) Overhead Guys and Messengers, Communication Cables and Communication Service Drops

B
Communication Open Wire Conductors Supply Cables Treated as in Rule 57.8 and Supply Service Drops 0 - 750 Volts

C
Supply Conductors, Supply Cables of 0 - 750 Volts and Trolley Span Wires

D
Supply Conductors and Supply Cables, Above 750 B

1

Vertical clearance above all signs upon which men can walk

8 Feet

8 Feet

8 Feet

12 Feet

2

Vertical clearance above all signs upon which men cannot walk

2 Feet

2 Feet

3 Feet

8 Feet

3

Vertical clearance under signs which are illuminated

2 Feet C

2 Feet E

3 Feet

Prohibited F

4

Vertical clearance under signs which are non–illuminated

6 inches D

1 Foot

3 Feet

Prohibited F

5

Horizontal clearance from signs which are illuminated

3 Feet C

3 Feet E

3 Feet

6 Feet

6

Horizontal clearance from signs which are non–illuminated

6 inches D

1 Foot

3 Feet

6 Feet

(a)    These clearances do not apply to service drop conductors which are attached to signs for the purpose of serving such signs.

 

(b)    Nothing herein contained shall be construed as authorization of noncompliance with standards of the Industrial Safety Board of the California Division of Industrial Safety, including section 2603 of the Electrical Safety Orders, entitled “Provision for Preventing Accidents Due to Proximity of High-Voltage Lines”, approved by that Board.

 

(c)    May be reduced to 6 inches provided illuminated sign is grounded.

 

(d)    May be reduced if adequate separation is provided by means of a suitable non–conducting separator.

 

(e)    May be reduced to 1 foot for communication open wire conductors only, provided illuminated sign is grounded

 

(f)    When conductors are at a level of 8 feet or more below the level of the lowest portion of the sign but not vertically under the sign, no horizontal clearance is required between the vertical planes through the conductor nearest the sign and the vertical projection of the extremities of the sign. Also note (b) above.


Strikeout and Underline Version

Table 2A

 

Minimum Clearances of Wires from Signs Mounted on Buildings and Isolated Structures A

 

Case
No.

Nature of Clearance Type of Sign

A
Span Wires (Other than Trolley Span Wires) Overhead Guys and Messengers, Communication Cables and Communication Service Drops

B
Communication Open Wire Conductors Supply Cables Treated as in Rule 57.8 and Supply Service Drops 0 - 750 Volts

C
Supply Conductors, Supply Cables of 0 - 750 Volts and Trolley Span Wires

D

Supply Conductors and Supply Cables, Above 750 – 300,000 volts B

E

Supply Conductors and Supply Cables, 300 – 550 kV

1

Vertical clearance above all signs upon which men can walk

8 Feet

8 Feet

8 Feet

12 Feet

20 ft (g)

2

Vertical clearance above all signs upon which men cannot walk

2 Feet

2 Feet

3 Feet

8 Feet

20 ft (g)

3

Vertical clearance under signs which are illuminated

2 Feet C

2 Feet E

3 Feet

Prohibited F

Prohibited F

4

Vertical clearance under signs which are non–illuminated

6 inches D

1 Foot

3 Feet

Prohibited F

Prohibited F

5

Horizontal clearance from signs which are illuminated

3 Feet C

3 Feet E

3 Feet

6 Feet

15 ft. (h)

6

Horizontal clearance from signs which are non–illuminated

6 inches D

1 Foot

3 Feet

6 Feet

15 ft (h)

(a)    These clearances do not apply to service drop conductors which are attached to signs for the purpose of serving such signs.

 

(b)    Nothing herein contained shall be construed as authorization of noncompliance with standards of the Industrial Safety Board of the California Division of Industrial Safety, including section 2603 of the Electrical Safety Orders, entitled “Provision for Preventing Accidents Due to Proximity of High-Voltage Lines”, approved by that Board.

 

(c)    May be reduced to 6 inches provided illuminated sign is grounded.

 

(d)    May be reduced if adequate separation is provided by means of a suitable non–conducting separator.

 

(e)    May be reduced to 1 foot for communication open wire conductors only, provided illuminated sign is grounded

 

(f)    When conductors are at a level of 8 feet or more below the level of the lowest portion of the sign but not vertically under the sign, no horizontal clearance is required between the vertical planes through the conductor nearest the sign and the vertical projection of the extremities of the sign. Also note (b) above.

 

(g)    Shall be increased by 0.04 ft per kv in excess of 300 kv.

 

(h)    Not applicable to certain kinds of conductors.

 

1.          Supply conductors of same phase and polarity, Rule 54.4-C3c

2.          Insulated supply conductors in multi-conductor cables, Rule 57.4-C

3.          Communication insulated conductors or multiple-conductor cables, Rule 87.4-C1


Final Version

Table 2A

 

Minimum Clearances of Wires from Signs Mounted on Buildings and Isolated Structures A

 

Case
No.

Nature of Clearance Type of Sign

A
Span Wires (Other than Trolley Span Wires) Overhead Guys and Messengers, Communication Cables and Communication Service Drops

B
Communication Open Wire Conductors Supply Cables Treated as in Rule 57.8 and Supply Service Drops 0 - 750 Volts

C
Supply Conductors, Supply Cables of 0 - 750 Volts and Trolley Span Wires

D

Supply Conductors and Supply Cables, 750 – 300,000 volts B

E

Supply Conductors and Supply Cables, 300 – 550 kV

1

Vertical clearance above all signs upon which men can walk

8 Feet

8 Feet

8 Feet

12 Feet

20 ft (g)

2

Vertical clearance above all signs upon which men cannot walk

2 Feet

2 Feet

3 Feet

8 Feet

20 ft (g)

3

Vertical clearance under signs which are illuminated

2 Feet C

2 Feet E

3 Feet

Prohibited F

Prohibited F

4

Vertical clearance under signs which are non–illuminated

6 inches D

1 Foot

3 Feet

Prohibited F

Prohibited F

5

Horizontal clearance from signs which are illuminated

3 Feet C

3 Feet E

3 Feet

6 Feet

15 ft. (h)

6

Horizontal clearance from signs which are non–illuminated

6 inches D

1 Foot

3 Feet

6 Feet

15 ft (h)

(a)    These clearances do not apply to service drop conductors which are attached to signs for the purpose of serving such signs.

 

(b)    Nothing herein contained shall be construed as authorization of noncompliance with standards of the Industrial Safety Board of the California Division of Industrial Safety, including section 2603 of the Electrical Safety Orders, entitled “Provision for Preventing Accidents Due to Proximity of High-Voltage Lines”, approved by that Board.

 

(c)    May be reduced to 6 inches provided illuminated sign is grounded.

 

(d)    May be reduced if adequate separation is provided by means of a suitable non–conducting separator.

 

(e)    May be reduced to 1 foot for communication open wire conductors only, provided illuminated sign is grounded

 

(f)    When conductors are at a level of 8 feet or more below the level of the lowest portion of the sign but not vertically under the sign, no horizontal clearance is required between the vertical planes through the conductor nearest the sign and the vertical projection of the extremities of the sign. Also note (b) above.

 

(g)    Shall be increased by 0.04 ft per kv in excess of 300 kv.

 

(h)    Not applicable to certain kinds of conductors.

1.          Supply conductors of same phase and polarity, Rule 54.4-C3c

2.          Insulated supply conductors in multi-conductor cables, Rule 57.4-C

3.          Communication insulated conductors or multiple-conductor cables, Rule 87.4-C1