TABLE OF SPARKING DISTANCES
In Air for Various Voltages between Needle Points
Volts Distance
Inches Centimeter
5,000 .225 .57
10,000 .470 1.19
15,000 .725 1.84
20,000 1.000 2.54
25,000 1.300 3.30
30,000 1.625 4.10
35,000 2.000 5.10
40,000 2.450 6.20
45,000 2.95 7.50
50,000 3.55 9.90
60,000 4.65 11.8
70,000 5.85 14.9
80,000 7.10 18.0
90,000 8.35 21.2
100,000 9.60 24.4
110,000 10.75 27.3
120,000 11.85 30.1
130,000 12.95 32.9
140,000 13.95 35.4
150,000 15.00 38.1