UL 921-2020 pdf free download.Commercial Dishwashers.
2.1.2 A component of a product covered by this standard is not required to comply with a specific component requirement that:
a) involves a feature or characteristic not required in the application of the component in the product;
b) is superseded by a requirement in this standard; or
c) is separately investigated when forming part of another component, provided the component is
used within its established ratings and limitations.
2.1.3 A component complying with a CSA or UL component standard other than those specified in this Standard is acceptable if:
a) the component also complies with the applicable component standard specified in this Standard; or
b) the component standard:
1) is compatible with the ampacity and overcurrent protection requirements in the Canadian
Electncal Code (CEC). Part I and National Electrical Code. where appropnate:
2) considers long-term thermal properties of polymeric insulating materials in accordance
with the Standard for Polymeric Materials — Long Term Property Evaluations. UL 746B; and
3) any use limitations of the other component standard are identified and appropriately
accommodated in the end use application.
2.1.4 Components located in an EXTRA-LOW VOLTAGE CIRCUIT that are not relied upon to reduce the risk of electric shock. fire, or injury shall not require additional investigation.
2.1.5 A component that is also intended to perform other functions, such as over current protection, ground-fault circuit-interruption, surge suppression, any other similar functions, or any combination thereof, shall comply additionally with the requirements of the applicable CSA and UL standard(s) that cover devices that provide those functions, unless those other functions are:
a) not required for the application, and
b) not identified as part of markings. instructions, or packaging for the appliance.
2.1.6 A component not anticipated by the requirements of this end product standard, not specifically covered by the component standards specified in this Standard. and that involves a risk of fire, electric shock. or injury to persons shall be additionally investigated in accordance with the applicable CSA and UL standards, and shall comply with Clause 2.1.1 (b) — (e).
2.1.7 With respect to Clause Z.1&. reference to construction and performance requirements in another CSA and UL end product standard is suitable where that standard anticipates normal and abnormal use conditions consistent with the application of commercial dishwashers.UL 921 pdf download.