Change List for this Rule

 

General Order 95

 

Section IV

 

Strength Requirements for All Classes of Lines


Table 3: Grades of Construction

Class of Circuit Involved at Upper Level

Other Facilities Involved at Lower Level at Crossings, Conflicts or on Poles Jointly Used

Grade of Construction to Be Used at Upper Level

E or H

Class C Circuits

" A"

E, H or L

Major railways (steam, electric or other motive power, at crossings only)

" A"

E, H or L

Minor railways (at crossings only)

" B"

E or H

Under all conditions not required to be
Grade “A” (except supply cables treated as specified in Rule 57.8)

" B"

L

Under all conditions not required to be
Grade “A” or “B”

" C"

Supply cables treated as specified in Rule 57.8

Under all conditions

" C"

C

Class E or H Circuits

" A"

C

Major railways (at crossings only)

" B"

C

Class L circuits of more than 750 Volts

" C"

C

Supply cables treated as specified in Rule 57.8

" F"

C

Under all conditions not required to be Grade “A”, “B” or “C”

" F"


Note:      Rule 57.8 specified bonding and grounding of sheath and messenger of supply cables. Table 3 revised March 30, 1968 by Decision No. 73813.

 

Note:      Revised January 19, 1994 by Resolution SU–25.