With a MIG that should boil down to not pulling the trigger while holding the electrode if your body is making electrical contact with the earth. Especially when it's raining.Electric shock from welding can kill!! Any electric welder,
AC or DC, has the power to cause electrocution if the
electrode touches your bare skin while you are grounded.
• Wear dry, insulated gloves in good condition and
protective clothing. (Change as necessary to keep dry)
• Insulate yourself from the workpiece and ground by
wearing rubber soled shoes or stand on a dry insulated
mat. Do not touch the ground with any other part of
your body.
• Use fully insulated electrode holders.
• Do not use worn, damaged, undersized or poorly
spliced cables.
• Do not wrap cables carrying current around your body.
• Do not touch an energized electrode with bare hands.
• Turn off all equipment when not in use.
• Use only well maintained equipment. Repair or replace
damaged parts before further use.
• Wet working conditions should be avoided. Even a
person's perspiration can lower the body's resistance to
electrical shock.