Wow...some pictures. Sorry to hear of the loss of the rig. Fortunately, no one was hurt.

You bring up good points about wiring safety on rigs. Who verifies the wiring, capacity and distribution of the circuits if there is no documention supporting the manufacturing. Who also would troubleshoot the systems if there are no "as built" prints.

Just an example of what all the builders should do, and provide to their customers.
12 vdc wiring
120 VAC Wiring
Plumbing