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| Marathon Power Blocks | |
| General Information Power Terminal Blocks are available in six molding sizes. They are identified by the first three digits of the catalog number. The 140, 142, 143, 144 and 145 series are manufactured with general purpose phenolic rated at 150° C. The 141 series (mini) is the smallest member of the Power Terminal Block family and is manufactured of high impact thermoplastic rated at 125° C. The mini block can be ganged together to create various line lengths. All Power Terminal Blocks are UL recognized file number E62806 and CSA certified file number LR19766, unless noted. Connector Wire Hole Size Conductor Opening Diameter of Opening #10-18................................................. .158" #4-14................................................... .250" #2-14................................................... .312" #2/0-14................................................ .438" #250MCM-6........................................ .630" #350MCM-6........................................ .718" #400MCM-6........................................ .769" #500MCM-4........................................ .875" Wire hole openings are designed to accept stranded conductors with the number of strands specified in UL 486. Consult factory for other diameters. Ratings and Standards The voltage ratings of terminal blocks are based upon the minimum spacing between electrically conductive parts line to line through air and over surface and line to ground through air and over surface. Class A Service equipment including deadfront switchboards, panel boards, service entrance devices. Class B Commercial appliances including business equipment, electronic data processing equipment and the like. Class C General industrial and machine tool controls which can be further defined as equipment falling under UL 508. Ratings based on UL 1059 may be higher in some cases depending on application.
Spacing in Inches |