UL 427
$315.00
Refrigerating Units
Please note: All interim revisions for this edition available at time of your purchase will be included.
Refrigerating Units
UL 427
1 Scope
1.1 These requirements cover refrigerating units intended for connection in accordance with the National Electrical Code, NFPA 70, to alternating-current (ac) circuits rated not greater than 600 volts.
1.2 This standard also covers component refrigeration systems (self-contained mechanical refrigeration systems), not already covered by a UL standard, that heat, cool or dehumidify as integral (not stand-alone) components of appliances.
1.3 Refrigerating units covered by these requirements employ sealed, hermetic-type motor compressors, and air- or water-cooled condensers.
1.4 These requirements do not cover equipment intended for comfort cooling.
