Industrial control panels general information

Definition of a panel

UL considers industrial control panels as an assembly incorporating two or more components; motor controllers such as overload relays, etc.; and related control devices such as pushbuttons, pilot lights, etc.; with associated wiring, terminal blocks and similar components. In addition, this assembly shall incorporate electrical ratings and instructions to allow the installer sufficient information to properly install the equipment in accordance with the National Electrical Code and local codes. This assembly may be installed in an enclosure as enclosed type equipment or arranged onto a mounting panel as open type equipment where the assembly will be installed in an enclosure provided by others or at the installation site.

UL Listing Mark

The UL Listing Mark on an industrial control panel provides evidence that the assembly complies with an acceptable safety standard of a third party certification to the municipal inspection authority or the purchaser of the panel. The Listing Mark may be applied to a wide variety of designs ranging from custom-built panels to standardized designs with only minor variations.

The UL Listing Mark on an enclosed type control panel only covers the enclosure and the components that are installed within the enclosure and to the enclosure at the manufacturer's facility. The UL Listing Mark on an open type control panel only covers the mounting panel and those components that are mounted to it at the manufacturer's facility. Please note that the UL Listing Mark does not include coverage of any externally connected loads even if provided by the panel manufacturer. Also, the UL Listing Mark does not include coverage of any components shown on the wiring diagram that are indicated as being customer provided or are not in the panel. If an entire equipment assembly Listing is required, please contact us regarding our Factory Automation Equipment program.