Table 4 ESDD and NSDD values in mg/cm.² of the volcanic ash from Cotopaxi-2015 and Tungurahua-2016 left on the porcelain and glass insulators after each testing procedure

0.0762

116.86

0.0843

126.94

0.0278

83.64

0.0311

120.12

0.2341

266.78

0.2978

314.88

0.0932

254.23

0.1114

307.24

0.4793

481.28

0.5998

600.51

0.1853

526.92

0.2458

719.51

0.1493

101.56

0.1857

110.56

0.0736

149.31

0.1052

207.51

0.2760

221.24

0.4055

278.69

0.1415

293.94

0.1840

407.86

0.5991

424.67

0.6947

631.79

0.2430

536.26

0.2954

692.56