No, you won't be shocked if the pedestal is properly grounded and you follow the proper procedure of making sure the breaker is turned off before plugging in. If you're plugging into a "hot" outlet in the rain, it's possible, but unlikely, that the wet plug could create a current path to your hand. Play it safe and always make sure the breaker is off when plugging in. That also helps save the plug and outlet contacts from damage due to arcing.