What is OSHA minimum approach distance?
As specified in Table R-6 of 1910.269 for phase to phase nominal voltages of 46.1 to 72.5 kilovolts, the minimum approach distance when phase to ground exposure is the concern is 3 feet (0.9 m) which is the clearance between the blade side on the bottom and the jaw at the top of the switch.
What is the minimum approach distance?
The word is actually an acronym that stands for minimum approach distance, which is the calculated safe working distance that provides worker protection when working on or in the vicinity of energized lines and equipment.
What is needed to determine minimum approach distances from the appropriate tables?
If employees will be working at elevations greater than 900 meters (3,000 feet) above mean sea level, the employer shall determine minimum approach distances by multiplying the distances in this table by the correction factor in Table – 4 corresponding to the altitude of the work.
What is the minimum approach distance to power lines?
The Occupational Safety and Health Administration (OSHA) requires that equipment be kept at least 10 feet away from power lines with voltages up to 50kV….1. Work at a safe distance.
| FPL Power Line Voltages | OSHA Minimum Approach Distance* (OSHA 1926.1408 Table A) |
|---|---|
| Over 200kV to 350kV | 20 feet |
| Over 350kV to 500kV | 25 feet |
What is the minimum approach distance when working on an energized conductor?
4 feet, 0 inches
Scenario 1: Your utility has established, as a written rule, a minimum approach distance of 4 feet, 0 inches for employee exposure to energized parts on a 25 kV system, regardless of whether that exposure is phase to ground or phase to phase.
What is the minimum approach distance for a unqualified workers?
10 feet
Unqualified employees must maintain the minimum approach distances of at least 10 feet from overhead power lines.
What is an approach distance?
Minimum approach distance is the closest distance a qualified or authorized person is permitted to approach an exposed, energized object.
What is the minimum distance that film crews and equipment must maintain from overhead power lines?
Under the table, for insulated lines of less than 300 volts, the minimum clearance distance is 3 feet; for uninsulated lines, it is 10 feet.
What is the minimum distance that untrained employees can work around standard distribution systems?
Under Table R-6, the minimum approach distance for a 25 kV system is 2 feet, 4 inches for phase-to-ground exposures, and 2 feet, 7 inches for phase-to-phase exposures.
What does OSHA 1910.269 require of line clearance arborists?
Line-clearance tree trimming is defined at 29 CFR 1910.269(x) as “[t]he pruning, trimming, repairing, maintaining, removing, or clearing of trees, or the cutting of brush, that is within the following distance of electric supply lines and equipment: (1) For voltages to ground of 50 kilovolts or less – 3.05 meters (10 …
When does OSHA start enforcing minimum approach distance?
OSHA is adopting the following policy for enforcement of the minimum approach distance requirements in 29 CFR 1910.269 and 29 CFR 1926.960 beginning on July 1, 2017:
How are minimum approach distances for work determined?
If employees will be working at elevations greater than 900 meters (3,000 feet) above mean sea level, the employer may determine minimum approach distances by multiplying the distances in this table by the correction factor in 29 CFR 1910.269 Table R-5, or 29 CFR Part 1926, Subpart V, Table V-4, corresponding to the altitude of the work.
What is the minimum approach distance for a 25 kV system?
Scenario 1: Your utility has established, as a written rule, a minimum approach distance of 4 feet, 0 inches for employee exposure to energized parts on a 25 kV system, regardless of whether that exposure is phase to ground or phase to phase. This distance is greater than the minimum approach distances required by ยง1910.269, Table R-6.
Which is the current NESC minimum approach distance standard?
Section 43 of the current NESC (ANSI-C2) has more recent and slightly greater values for Minimum Approach Distances than the “269” standard; employers and workers are advised to review the NESC MAD values and incorporate them into work procedures. Additional tables in the “269” standard provide guidance for adjusting MADs for: