The identification number is assigned as a reference by the submitter for each combination motor controller construction or rating.
Type F combination motor controller consisting of manual self-protected combination motor controller and motor controller Type E (self-protected) combination motor controller consisting of manual self-protected combination motor controller and motor controller Type D combination motor controller consisting of instantaneous trip circuit breaker, motor controller and overload relay Type C combination motor controller consisting of inverse time circuit breaker, motor controller and overload relay Type A combination motor controller consisting of a disconnect switch, fuses, motor controller and overload relay The letter designating the construction type of the combination motor controller, as defined in UL 508 or UL 6, the Standards of Safety for Industrial Control Equipment, comprising specific components are described below: A See below for a detailed explanation of the tabular information contained in the spreadsheets: The specified ratings for the combination motor controller may be applied to the end-product equipment only when all of the specific components listed are provided in the end-product equipment and installed according to any applicable conditions of acceptability.Ĭomponents other than those identified in the combination motor controller and connected in the power circuit of the combination motor controller will require additional evaluation. Each individual component is listed or recognized to the requirements for the applicable component standard.
The spreadsheets cover the application of individual components, including a disconnecting means, an overcurrent protective device, motor controller and motor overload protection, and as a combination motor controller with specified ratings, including an SCCR. The combinations listed in the spreadsheets below may be applied in a manufacturer’s listed industrial control panel without further evaluation or specific documentation in the manufacturer’s UL Solutions procedure pages. They are intended for those manufacturers that purchase the discrete components and assemble combination motor controllers within their panels to achieve a combination SCCR that is higher than the lowest-rated individual component. Industrial control panel manufacturers can use the spreadsheets below for guidance.
As specified in the National Electrical Code (NEC), UL 508A Supplement SB, the Standard for Industrial Control Panels, provides an accepted method for determining the SCCR of the control panel.