Original Version
Rule 86.8 (Table 16)
86.8 Guy Insulators
Insulators which sectionalize guys shall conform to the following specifications based on the highest voltage of supply conductors carried at the level on the pole, tower, structure or crossarm nearest which the guy is attached and adequate for the voltage of supply circuits through which the guy passes.
A. Material
Insulators used in guys on communication lines shall be porcelain, glass or other equally suitable material.
B. Strength (see Rule 44, Table 4 and Rule 49.5-B)
C. Voltage Requirements
Insulators
used in guys on communication lines
shall be so designed that their dry flashover voltage is not more than 75% of
their puncture voltage at the operating frequencies of supply lines to which
guys are exposed.
Insulation used in guys on communication lines shall have a dry
flashover voltage not less than as specified in Table 16 when tested in
accordance with the Standards (No. 41, March, 1930) of the American Institute
of Electrical Engineers under the maximum mechanical loadings specified by this
Order for the guy construction involved.
Table 16 Guy Insulator Flashover Voltage |
|
Nominal voltage of circuits nearest point of attachments |
Dry flashover voltage of insulators |
0-7500 volts |
15,000 volts |
7500-17,500 volts |
Double the circuit voltage |
Over 17,500 volts |
35,000 volts |
Strikeout and Underline Version
Rule 86.8 (Table 16)
86.8 Guy Insulators
Insulators which sectionalize guys shall conform to the following specifications based on the highest voltage of supply conductors carried at the level on the pole, tower, structure or crossarm nearest which the guy is attached and adequate for the voltage of supply circuits through which the guy passes.
A. Material
Insulators used in guys on communication lines shall be porcelain, glass or other equally suitable material.
B. Strength (see Rule 44, Table 4 and Rule 49.5-B)
C. Voltage Requirements
Insulatorsused in guys on communication lines
shall be so designed that their dry flashover voltage is not more than 75% of
their puncture voltage at the operating frequencies of supply lines to which
guys are exposed.
Insulation used in guys on communication lines shall have a dry
flashover voltage not less than as specified in Table 16 when tested in
accordance with the Standards (No. 41, March, 1930) of the American Institute
of Electrical Engineers under the maximum mechanical loadings specified by this
Order for the guy construction involved.
Table 16 Guy Insulator Flashover Voltage |
|
Nominal voltage of Is in Proximity |
Dry flashover voltage of insulators |
0-7500 volts |
15,000 volts |
7501-17,500 volts |
Double the circuit voltage |
|
35,000 volts |
22,501 – 35,500 volts |
Double the circuit voltage |
Note: To Meet dry flashover requirements, use of multiple insulators in series is permissible
Final Version
Rule 86.8 (Table 16)
86.8 Guy Insulators
Insulators which sectionalize guys shall conform to the following specifications based on the highest voltage of supply conductors carried at the level on the pole, tower, structure or crossarm nearest which the guy is attached and adequate for the voltage of supply circuits through which the guy passes.
A. Material
Insulators used in guys on communication lines shall be porcelain, glass or other equally suitable material.
B. Strength (see Rule 44, Table 4 and Rule 49.5-B)
C. Voltage Requirements
Insulators used in guys on communication lines
shall be so designed that their dry flashover voltage is not more than 75% of
their puncture voltage at the operating frequencies of supply lines to which
guys are exposed.
Insulation used in guys on communication lines shall have a dry
flashover voltage not less than as specified in Table 16 when tested in
accordance with the Standards (No. 41, March, 1930) of the American Institute
of Electrical Engineers under the maximum mechanical loadings specified by this
Order for the guy construction involved.
Table 16 Guy Insulator Flashover Voltage |
|
Nominal voltage of Circuit to Which Guy Is in Proximity |
Dry flashover voltage of insulators |
0-7500 volts |
15,000 volts |
7501-17,500 volts |
Double the circuit voltage |
17,501 – 22,500 volts |
35,000 volts |
22,501 – 35,500 volts |
Double the circuit voltage |
Note: To Meet dry flashover requirements, use of multiple insulators in series is permissible