What are some electrical hazards employee should look for while working on aircraft modifications?

Employees should identify and mitigate electrical contact hazards by maintaining a safe distance from energized parts. The minimum approach distance (MAD) should be observed, and it varies based on voltage range:

• 0 to 50KV: 10 feet (3 meters)
• Over 50KV to 200KV: 15 feet (5 meters)
• Over 200 KV to 350KV: 20 feet (6 meters)
• Over 350 KV to 500KV: 25 feet (8 meters)
• Over 500 KV to 750KV: 35 feet (11 meters)
• Over 750KV to 1000 KV: 45 feet (14 meters)

Ensure to allow for machine movement and electrical line swaying when maintaining these distances. Also, remember that these requirements shall apply except where employer, local or governmental regulations are more stringent. [2] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]

Additionally, employees must handle conductive materials and equipment in a manner that prevents contact with exposed energized conductors or circuit parts. If handling long, dimensional conductive objects, work practices such as insulation, guarding, and material handling techniques should be implemented to minimize the hazard. [1]

Other key points include:

• Using portable ladders with nonconductive siderails if there is a chance of contact with exposed energized parts.
• Removing conductive articles of jewelry and clothing, or ensuring they are insulated.
• Providing adequate safeguards such as insulating equipment or barriers during housekeeping duties near live parts.
• Ensuring that electrical safety interlocks are only defeated temporarily by qualified personnel and are returned to operable condition after work is completed. [1] [1] [1] [1]