Can you field modify a Nema 12 8903LX lighting contactor to a NEMA 3R?
This is not recommended. The NEMA 12 and NEMA 3R enclosures use a different paint. To make this field conversion the enclosure should be listed as NEMA 12/3R. Suggest customer order the 9991SDH1 enclosure and the open style lighting contactor. Otherwise, the NEMA rating is not valid.