California Code of Regulations
Title 14 - Natural Resources
Division 1.5 - Department of Forestry and Fire Protection
Chapter 7 - Fire Protection
Article 4 - Fire Prevention Standards for Electric Utilities
Section 1254 - Minimum Clearance Provisions-PRC 4292
Current through Register 2024 Notice Reg. No. 12, March 22, 2024
The firebreak clearances required by PRC 4292 are applicable within an imaginary cylindroidal space surrounding each pole or tower on which a switch, fuse, transformer or lightning arrester is attached and surrounding each dead end or corner pole unless such pole or tower is exempt from minimum clearance requirements by provisions of 14 CCR 1255 or PRC 4296. The radius of the cylindroid is 3.1 m (10 feet) measured horizontally from the outer circumference of the specified pole or tower with height equal to the distance from the intersection of the imaginary vertical exterior surface of the cylindroid with the ground to an intersection with a horizontal plane passing through the highest point at which a conductor is attached to such pole or tower. (See Figure 2 this Article.) Flammable vegetation and materials located wholly or partially within the firebreak space shall be treated as follows:
(a) At ground level--remove flammable materials, including but not limited to, ground litter, duff and dead or desiccated vegetation that will allow fire to spread, and;
(b) From 0-2.4 m (0-8 feet) above ground level--remove flammable trash, debris or other materials, grass, herbacious and brush vegetation. All limbs and foliage of living trees shall be removed up to a height of 2.4 m (8 feet).
(c) From 2.4 m (8 feet) to horizontal plane of highest point of conductor attachment--remove dead, diseased or dying limbs and foliage from living sound trees and any dead, diseased or dying trees in their entirety.
1. Repealer
of subsection (d) filed 5-11-83; effective thirtieth day thereafter (Register
83, No. 20).
2. Amendment of first paragraph and subsection (a)
filed 10-24-2005; operative 11-23-2005 (Register 2005, No.
43).
Note: Authority cited: Section 4292, Public Resources Code. Reference: Section 4292, Public Resources Code.
