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Altitude Correction Factor for Minimum Approach Distances

Minimum approach distances ensure that workers do not approach or take any conductive object closer to the energized parts. If the work is performed at elevations greater than 3,000 ft (900m) above mean sea level, the minimum approach distance must be determined by multiplying the distances by the correction factor corresponding to the altitude at which the work is performed.

Altitude
Correction Factor
3,000' (900m)
4,000' (1,200m)
5,000' (1,500m)
6,000' (1,800m)
7,000' (2,100m)
8,000' (2,400m)
9,000' (2,700m)
10,000' (3,000m)
12,000' (3,600m)
14,000' (4,200m)
16,000' (4,800m)
18,000' (5,400m)
20,000' (6,000m)
1.00
1.02
1.05
1.08
1.11
1.14
1.17
1.20
1.25
1.30
1.35
1.39
1.44
Reference
Table R-10 in [1910.269(l)(10)]

Additional Information:

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