section 15058 common motor requirements for hvac equipment part i
section 15058 common motor requirements for hvac equipment part i
section 15058 common motor requirements for hvac equipment part i
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2.3<br />
A.<br />
B.<br />
c.<br />
D.<br />
POLYPHASE MOTORS<br />
Description: NEMA MG I, Design B, medium induction <strong>motor</strong>.<br />
Efficiency: Energy efficient, as defined in NEMA MG 1.<br />
Service Factor: 1.15.<br />
Multispeed Motors: Variable torque.<br />
1. For <strong>motor</strong>s with 2: 1 speed ratio, consequent pole, single winding.<br />
2. For <strong>motor</strong>s with other than 2: I speed ratio, separate winding <strong>for</strong> each speed.<br />
E. Multispeed Motors: Separate winding <strong>for</strong> each speed.<br />
F. Rotor: Random-wound, squirrel cage.<br />
G. Bearings: Regreasable, shielded, antifriction ball bearings suitable <strong>for</strong> radial and thrust loading.<br />
H. Temperature Rise: Match insulation rating.<br />
1. Insulation: Class F.<br />
]. Code Letter Dcsign
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