WAC 296-878-17005. Maintain clearance between window cleaners and power lines

(1) You must maintain clearances between window cleaners and power lines as indicated in Tables 2 and 3. Table 2 Minimum Clearances from Power Lines – Insulated Lines Voltage Minimum distance Alternatives Less than 300 volts 3 feet (0.9 m) ---- 300 volts to 50 kv 10 feet (3.1 m) ---- More than 50 kv 10 feet (3.1 m) plus 0.4 inches (1.0 cm) for each 1 kv over 50 kv 2 times the length of the line insulator, but never less than 10 feet (3.1 m) Voltage Minimum distance Alternatives Less than 300 volts 3 feet (0.9 m) ---- 300 volts to 50 kv 10 feet (3.1 m) ---- More than 50 kv 10 feet (3.1 m) plus 0.4 inches (1.0 cm) for each 1 kv over 50 kv 2 times the length of the line insulator, but never less than 10 feet (3.1 m) Table 3 Minimum Clearances from Power Lines – Uninsulated Lines Voltage Minimum distance Alternatives Less than 50 kv 10 feet (3.1 m) ---- More than 50 kv 10 feet (3.1 m) plus 0.4 inches (1.0 cm) for each 1 kv over 50 kv 2 times the length of the line insulator, but never less than 10 feet (3.1 m) Voltage Minimum distance Alternatives Less than 50 kv 10 feet (3.1 m) ---- More than 50 kv 10 feet (3.1 m) plus 0.4 inches (1.0 cm) for each 1 kv over 50 kv 2 times the length of the line insulator, but never less than 10 feet (3.1 m) (2) You must follow these procedures when window cleaners need to get closer to power lines than allowed in Tables 2 and 3: (a) Notify the utility company or electrical system operator of the need to work closer than the minimum clearances to power lines before starting the work; (b) Begin the work only when the utility company or electrical system operator has deenergized or relocated the lines, or installed protective coverings to prevent accidental contact with the lines.