Requirements for pad-mounted compartmental type single phase distribution transformers with separable insultaed high voltage connectors, high voltage, 24 940 GRD Y/14 400 volts and below; low voltage, 240/120; 167 KVA and smaller
1971
https://discoverarchives.library.ualberta.ca/requirements-for-pad-mounted-compartmental-type-single-phase-distribution-transformers-with-separable-insultaed-high-voltage-connectors-high-voltage-24-940-grd-y-14-400-volts-and-below-low-voltage-240-120-167-kva-and-smaller
0ANSI C057.12.25