EE TURNED ON THE 7' BREAKER & IT TRIPPED THE MAIN BREAK SO HE SHUT OFF THE 7 ' BREAKER & RESET THE MAIN, THEN PROCEEDED BACK TO LOOK AT THE 7' STARTER & EVERYTHING LOOK OK SO HE WENT TO THE N EW BREAKER BOX, LIFTED LID TO LOOK INSIDE & AT THE SAME TIME A COWORKER TURNED THE MAIN BACK ON& THE BOX HE WAS LOOKING AT EXPLOSED