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The MA1000R enclosure is obsolete and no longer available. What enclosure can be used for a MAL or MHL circuit breaker?

The enclosures for the MAL family of circuit breakes are obsolete and no longer available. Consider using a PowerPact M-frame circuit breaker (800A max) or PowerPact P-frame circuit breaker (1200A max). The NEMA 3R enclosure for the M-frame PowerPact would be M800R. The NEMA 3R enclosure for the P-frame PowerPact would be P1200R.