A Sub-panel is needed in the following situations:
If the type of connection to the 920 RC Switch for LINE AND LOAD is thru power cables, then lugs are needed.  Lugs are part of the sub-panel.
920 RC switch with Sub-Panel
If the 920 RC switch is specified with a NEMA Type Enclosure then a sub-panel will automatically be included (See below)
920 RC switch Specified with UL Type 1 Enclosure (Sub-Panel is automatically included)
NOTE: If the 920 RC switch is to be mounted in Split Bus Panel or existing Panelboard that has Bus to Bus Connection then a Sub-panel is not needed and 920 will only come with Bus Stabs (See below)
Open Type 920 RC switch
For further information, you may click on this 920 link or contact Technical Support at 1-800-800-2726 then dial 3 or send an email to technicalsupport@ascopower.com.
Published for:ASCO Power Technologies USA