Sheath Diameter:  
Approximate MgO Response times:
MgO Diameter Grounded Junction Ungrounded Junction
0.02 .10 Sec. .40 Sec.
0.032 .14 Sec. .50 Sec.
0.04 .19 Sec. .65 Sec.
0.063 .22 Sec. .75 Sec.
0.09 .37 Sec. .88 Sec.
0.125 .52 Sec. 1.25 Sec.
0.188 1.00 Sec. 2.40 Sec.
0.25 2.20 Sec. 4.30 Sec.
20 Gauge Bare wire .45 Sec.
14 Gauge Bare wire .50 Sec.