I think the lower box is the main disconnect after the meter and thus wouldn't be sealed. I notice that the "electrician" who rigged up this lethal wiring didn't consider it necessary to provide any sort of OCPD for the cord.

And what about grounding? This being a mobile home the main panel inside the trailer would be wired for a 4-wire rather than 3-wire service, right? Or did this genius bridge neutral to ground somewhere to "fix" that problem? If so, I wouldn't want to be stepping in or out of the trailer if that white wire became detached.

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