One thing that John(Reno) posted above worries me a tad.
Over here, with any freezer/chiller room, with door heaters, you are required to have the heat tape tails come out on the outside of the door.
These usually come out into an enclosure, where they are joined to a permanent supply (ie: is supplied from the refrigeration panel).
Using a recept and a plug in a place that is renowned for moisture is an accident waiting to happen.
