The 601RJ-10 is a multiple position jumper accessory designed for use with Marathon's 601 series double-row terminal blocks. This jumper facilitates electrical connections across multiple positions within the terminal block assembly, supporting the same electrical ratings as the base 601 series: 20 A at 300 Volts AC/DC (Class B/C). The jumper is compatible with the 601 GP series terminal blocks, which feature phenolic bases rated to 150 °C (UL RTI), plated brass terminals, and accept bare wire in the #12–#22 AWG range. The 601RJ-10 is commonly used in industrial control panels, power distribution systems, and electrical enclosures where multiple terminal positions require interconnection, offering a convenient alternative to individual wire jumpers.