Change List for this Rule

 

Original Version

Rule 54.4-C7

 

54.4-C7)    New Rule

 

 

Strikeout and Underline Version

Rule 54.4-C7

 

54.4-C7)    Vertically at Crossings in Spans:

 

The Vertical clearance required at crossings in spans by Table 2, Cases 4, 5, 6 and 7, may be reduced when:

 

1)    All conductors are of the same circuit, and

 

2)    Vertical taps are installed between related crossing conductors.

 

The minimum vertical clearance shall be the following:

 

Supply Conductor Voltage:

Minimum Vertical Clearance:

0 - 750 Volts

12 inches

750 - 20,000 Volts

24 inches

20,000 - 35,000 Volts

30 inches

35,000 - 75,000 Volts

48 inches

 

EXCEPTIONS:

 

a)    In vertical configuration, there is no specific vertical clearance required between conductors that are mechanically and electrically connected at the crossing.

 

b)    There is no specific clearance required for 0 - 750 volt multiconductor cable having a bare neutral (Rule 54.10 ) provided the messengers are mechanically connected.


Final Version

Rule 54.4-C7

 

54.4-C7)    Vertically at Crossings in Spans:

 

The Vertical clearance required at crossings in spans by Table 2, Cases 4, 5, 6 and 7, may be reduced when:

 

1)    All conductors are of the same circuit, and

 

2)    Vertical taps are installed between related crossing conductors.

 

The minimum vertical clearance shall be the following:

 

Supply Conductor Voltage:

Minimum Vertical Clearance:

0 - 750 Volts

12 inches

750 - 20,000 Volts

24 inches

20,000 - 35,000 Volts

30 inches

35,000 - 75,000 Volts

48 inches

 

EXCEPTIONS:

 

a)    In vertical configuration, there is no specific vertical clearance required between conductors that are mechanically and electrically connected at the crossing.

 

b)    There is no specific clearance required for 0 - 750 volt multiconductor cable having a bare neutral (Rule 54.10 ) provided the messengers are mechanically connected.