Epoxy Cycloaliphatic Insulators and bushing wells meet the design criteria in ANSI/ IEEE - 386. By meeting this standard, all Federal Pacific bushings and bushing wells will interface with matching load-break and non-loadbreak inserts and elbows. The XL bushings and bushing wells feature a removable stud and include four aluminum inserts in a 3-inch square pattern on the interface end and two inserts in a 2-inch bolt circle centered on the 1/2-inch diameter tapped conductor rod on the bus end.

The XM bushings and bushing wells feature a removable stud and are clamped to the mounting surface in a 3-bolt pattern using a stainless steel plate and hardware on the (external) interface end. Two inserts in a 2-inch bolt circle are centered on the 1/2-inch diameter tapped copper conductor rod on the (internal) bus end.

The legacy XL bushings and bushing wells also feature a removable stud, but utilize four aluminum inserts in a 3-inch square pattern on the interface end for mounting. There are two inserts in a 2-inch bolt circle centered on the 1/2- inch diameter tapped conductor rod on the bus end. Contact the factory for availability or alternative designs if replacing XL bushings or bushing wells, or EEpoxy bushing wells.