How do you find the minimum approach distance?

Employer must establish minimum approach distances based on formulas in the standard. For voltages up to 72.5 kV, the default distances are the same as proposed. For voltages exceeding 72.5 kV, the distances are based on the equations used to calculate the proposed distances (D = TOV × (C + a) + M).

What is the minimum safe approach distance?

A minimum safe approach distance (MSAD) of 10 feet must be maintained between any portion of a scaffold system, forklift or aerial lift and any energized, uninsulated electrical component.

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 when working on any 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 minimum approach distance OSHA?

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 preferred setback distance from overhead wires during cleanup OSHA?

Stay at least 10 feet away from overhead wires during cleanup and other activities.

What is OSHA minimum approach distance?

What is the minimum safe working distance from a 50000 volt power line?

Until the power line operator verifies the voltage, the employer must maintain a safe clearance distance of 7 metres. The distances listed in Schedule 4 have been taken from Alberta’s Electrical and Communication Utility Code (ECUC), 2nd Edition, 2002.

How far should a crane be from power lines?

Line Clearance Distance 29 CFR 1910.269, OSHA’s Electric Power Generation, Transmission, and Distribution standard, limits crane operations to a minimum clearance distance of 10 feet from power lines and related equipment energized up to 50 kilovolts (50,000 volts).

What is the minimum required clearance distance from a power line with a voltage of 100 kV?

Work at a safe distance 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.

What is NFPA 70E standard?

NFPA 70E , Standard for Electrical Safety in the Workplace , is a critical document to help provide a working area for employees that is safe from unacceptable risk associated with the use of electricity in the workplace.

What are the forms of approach distances generally take?

Approach distances generally take two forms-shock hazard distance and flash hazard distance. Note that the flash or arc hazard distance also includes the blast hazard distance.

How are minimum approach distances calculated in table 2940.2?

NOTE to subsection (a) (2): Approach distances in Table 2940.2-3 and Table 2940.2-4 assume a maximum anticipated per-unit transient overvoltage in Table 2940.2-5. (A) Minimum approach distances shall be adjusted to account for work locations above 3,000 feet using altitude correction factors (Table 2940.2-7).

What are the minimum approach distances in California?

California Code of Regulations, Title 8, Section 2940.2. Minimum Approach Distances. Subchapter 5. Electrical Safety Orders Group 2. High-Voltage Electrical Safety Orders Article 36. Work Procedures and Operating Procedures §2940.2. Minimum Approach Distances.

How to determine the minimum approach distance for a single phase system?

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 2940.2-7 corresponding to the altitude of the work. 2 For single-phase systems, use voltage-to-ground.

How to calculate the minimum approach distance for a car?

Minimum Approach Distance Calculator Voltage range (kV) Assumed maximum per-unit transient overv 72.6 to 420.0 3.5 420.1 to 550.0 3.0 550.1 to 800.0 2.5