Designed for continuous duty service on close-coupled pumps using NEMA JM mounting provisions. All motors have a rigid mounting base and NEMA JM pump shaft. Mechanical Features: Open drip-proof construction, cooling air exhausts at the shaft end for maximum cooling. Oversized locked bearing on shaft end limits axial shaft movement. Drip covers are available as accessory kits for 143-5JM and 182- 4JM motors. Electrical Features: High efficiency copper windings with NEMA 1.15 service factors. UL and CSA recognized designs. All 180 and 210 frame Rolled Steel motors have Class F Insulation.