EMPLOYEE PREPARING TO STEP INSIDE CONE BOWL TO WELD, PLACED HAND ON TOP OF BOWL TO BRACE HIMSELF AS HE STEPPED INTO BOWL. HIS HAND WAS INADVERTENTLY PLACED ON TOP OF TOP OF WELDING LEAD LAYIN G ACROSS BOWL. WHEN HE PRESSED DOWN ON HIS HAND, THE LEAD ARCED, BURNING HIS WRIST.