SIZE OF ELECTRODES: The maximum size of electrodes for welding of any work and the size of run to be obtained from each shall be based on the following tables except for close butt-welds r other cases where any special technique is approved.

Sl. No.

Average thickness of plate or section Maximum size of electrodes to be used

1 Less than 5 mm 3.2 mm (10 SWG)2 5mm & above, but not less than 8 mm 4.0 mm (8 SWG)3 8 mm & above, but not less than 10 mm 5.0 mm (6 SWG)4 10 mm & above, but not less than 16 mm 6.0 mm (4 SWG)5 16 mm & above, but less than 25 mm 8.0 (5/16 (SWG)6 25 mm & above 9.0 mm (3/8 SWG)

Gauge of Electrodes

Sectional area of Separate run Approx. Size of run in cm/electrode 42.5 cm long

Maximum Minimum Maximum Minimum12 SWG 18.00 12.30 10.00 15.003.2 mm (10 SWG)

22.60 12.30 12.70 22.80

4.0 mm (8 SWG)

25.20 14.20 17.70 30.50

5.0 mm (6 SWG)

27.10 16.80 22.80 38.00

6.0 mm (4 SWG)

32.90 19.35 27.90 48.20

2 SWG 36.80 23.25 35.50 55.900 SWG or 5/16”

41.30 27.10 43.20 66.90