Local IAEI Chapter provided more information.
Regarding attempts to field repair electrical equipment, or change guts:
1) Regardless of permits or lack of AHJ enforcement, under authority of Federal OSHA 1910.303(A), 1910.399, NFPA 790, & 791, claims adjusters from
Bad-Faith insurers can void property-owner policy and deny claims with any evidence of altered electrical equipment, which is missing labeling from an approved Field Evaluation Body (FOB). An expense typically in excess of U$D 3000 and several months to complete; FOB approved fabrications, modifications, & combinations are avoided where off-the-shelf solutions exist.
2) Unidentifiable equipment missing OEM labels or name plates may be suspect of modification or fabrication.