Todd, one more important thing to look at. If, the person that did the wiring connected the white wire to a breaker on the shed, as it could be for 240 volt, then he most likely has it connected hot from the source.
So, take a look at the source, possibly your home service panel, and be sure to move the white wire to the neutral buss.
Peace
Dave
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So, take a look at the source, possibly your home service panel, and be sure to move the white wire to the neutral buss.
Peace
Dave
Sent from my DROID RAZR using Tapatalk 2