1 Scope

1.1 This Standard applies to electric household dishwashers intended to be used in nonhazardous locations in accordance with CSA C22.1, Canadian Electrical Code, Part I (CE Code, Part I) and the National Electrical Code (NEC), NFPA 70, on circuits having a nominal voltage not exceeding 250 V.

1.2 This standard applies to both cord-connected appliances and permanently-connected appliances.

1.3 This Standard applies to smart-enabled household dishwashers that are intended to receive and respond to communication signals or data relating to power billing rate or demand response, or communication signals from a remote user interface such as a smart phone or computer. See Annex B.

1.4 This standard applies to household dishwashers generating ozone during normal operation. See Annex C.

1.5 This standard does not apply to commercial appliances. Commercial appliances are covered under the scope of the Standard for Commercial Dishwashing Machines, CSA C22.2 No. 168, or the Standard for Commercial Dishwashers, UL 921.

Summary of Topics

This new edition of ANSI/UL 749 dated May 25, 2023 includes the following changes in requirements:

– DW Terminal Blocks– Terminal Blocks– Remote Operation of Smart Dishwashers– Remote Safety Firmware/Software Update Requirements– Appliance Filter Requirements– Annex D – Alternative Electronic Circuit Requirements– Liquid Leaking from an Auxiliary Reservoir Requirements– Circuit Interrupters with Fire Extinguishing Agent for Use in Electrical Appliances– Leakage Current Detection Requirements– Switch Requirements– Control Requirement Revisions – (removal of legacy standards)– Clarifications to the Control Requirements– French Language Requirements– Double Insulation Requirements– Nichrome Wire Test Clarification– Update to NiCr Wire Test– Unintentional Operation– Miscellaneous Revisions to Clarify the Standard