WAC 296-45-901   Appendix A -- Nonmandatory.  


Appendix A -- Tables



TABLE 2

AC Live Work Minimum Approach Distance

With Transient Overvoltage Factor
  Distance to employee in feet-inches, phase to ground
Maximum anticipated per-unit transient overvoltage Air and clear live-line tool
Maximum phase-to-phase voltage in kilovolts
  121 145 169 242 362 550 800
1.5           6-0 9-8
1.6           6-6 10-8
1.7           7-0 11-8
1.8           7-7 12-8
1.9           8-1 13-9
2.0 2-5 2-9 3-0 3-10 5-3 8-9 14-11
2.1 2-6 2-10 3-2 4-0 5-5 9-4  
2.2 2-7 2-11 3-3 4-1 5-9 9-11  
2.3 2-8 3-0 3-4 4-3 6-1 10-6  
2.4 2-9 3-1 3-5 4-5 6-4 11-3  
2.5 2-9 3-2 3-6 4-6 6-8    
2.6 2-10 3-3 3-8 4-8 7-1    
2.7 2-11 3-4 3-9 4-10 7-5    
2.8 3-0 3-5 3-10 4-11 7-9    
2.9 3-1 3-6 3-11 5-1 8-2    
3.0 3-2 3-7 4-0 5-3 8-6    

Note 1: The distances specified in this table may be applied only where the maximum anticipated per-unit transient overvoltage has been determined by engineering analysis and has been supplied by the employer. Table 1 applies otherwise.
Note 2: The distances specified in this table are the air, and live-line tool distances.



TABLE 3

AC Live Work Minimum Approach Distance

With Transient Overvoltage Factor
  Distance to employee in feet-inches, phase to ground
Maximum anticipated per-unit transient overvoltage Air and clear live-line tool
Maximum phase-to-phase voltage in kilovolts
  121 145 169 242 362 550 800
1.5           7-4 12-1
1.6           8-9 14-6
1.7           10-2 17-2
1.8           11-7 19-11
1.9           13-2 22-11
2.0 3-7 4-1 4-8 6-1 8-7 14-10 26-0
2.1 3-7 4-2 4-9 6-3 8-10 15-7  
2.2 3-8 4-3 4-10 6-4 9-2 16-4  
2.3 3-9 4-4 4-11 6-6 9-6 17-2  
2.4 3-10 4-5 5-0 6-7 9-11 18-1  
2.5 3-11 4-6 5-2 6-9 10-4    
2.6 4-0 4-7 5-3 6-11 10-9    
2.7 4-1 4-8 5-4 7-0 11-2    
2.8 4-1 4-9 5-5 7-2 11-7    
2.9 4-2 4-10 5-6 7-4 12-1    
3.0 4-3 4-11 5-8 7-6 12-6    

Note 1: The distances specified in this table may be applied only where the maximum anticipated per-unit transient overvoltage has been determined by engineering analysis and has been supplied by the employer. Table 1 applies otherwise.
Note 2: The distances specified in this table are the air, and live-line tool distances.



TABLE 4

DC Live Work Minimum Approach Distance

With Transient Overvoltage Factor


Maximum anticipated per-unit transient overvoltage		 Distance to employee in feet-inches, conductor to ground
Air and clear live-line tool
Maximum phase-to-phase voltage in kilovolts
  250 400 500 600 750
1.5 or lower 3-8 5-3 6-9 8-7 11-10
1.6 3-10 5-7 7-4 9-5 13-1
1.7 4-1 6-0 7-11 10-3 14-4
1.8 4-3 6-5 8-7 11-2 15-9

Note 1: The distances specified in this table may be applied only where the maximum anticipated per-unit transient overvoltage has been determined by engineering analysis and has been supplied by the employer. However, if the transient overvoltage factor is not known, a factor of 1.8 shall be assumed.
Note 2: The distances specified in this table are the air, and live-line tool distances.



TABLE 5

Altitude Correction Factor
Altitude

Correction factor
(m) (ft)
900 3000 1.00
1200 4000 1.02
1500 5000 1.05
1800 6000 1.08
2100 7000 1.11
2400 8000 1.14
2700 9000 1.17
3000 10,000 1.20
3600 12,000 1.25
4200 14,000 1.30
4800 16,000 1.35
5400 18,000 1.39
6000 20,000 1.44

Note: If the work is performed at elevations greater than 3000 ft (900 m) above mean sea level, the minimum approach distance shall be determined by multiplying the distances in Table 1 through Table 4 by the correction factor corresponding to the altitude at which work is performed.




[Statutory Authority: RCW 49.17.040. 99-09-080, § 296-45-901, filed 4/20/99, effective 8/1/99. Statutory Authority: RCW 49.17.010, [49.17].040, [49.17].050 and [49.17].060. 98-07-009, § 296-45-901, filed 3/6/98, effective 5/6/98.]