Power Blocks

Marathon Special Products has been an industry leader for supplying power blocks in North America since 1955. We’ve achieved this by providing one of the broadest line offerings with various sizes, terminal styles, electrical ratings and features. Our power block offerings are sure to meet your needs. MSP’s power blocks are either UL recognized or listed. Most have either CSA certification or cUR recognition for Canadian customers, as well as compliance to CE (Component IEC 60947-7-1). Recognized power blocks comply to UL 1059 and CSA C22.2 No. 158. All of our power blocks meet the 600V spacing requirements for application classes B & C and some Class A (135s). Listed power blocks comply to UL 1953. These are all rated 600V and are intended to be used on the load side of service equipment in accordance with the National Electrical Code, NFPA 70. These blocks are used for splicing conductors in metallic wireways, auxiliary gutters, junction boxes, termination boxes and control panels in order to distribute power to separate loads. Listed power blocks additionally provide feeder circuit terminal spacing requirements of UL508A.

Marathon Special Products Bulk Fastening Power Blocks Distributors
Bulk Fastening

Marathon BFPB Series is a single pole design that consists of a series of stud fasteners to allow you to terminate various combinations of crimp lugs or flexible bus bar with one configuration. The series is ideal for use with flexible stranded wire terminations or large and abnormal wiring combinations.

Marathon Special Products High Voltage Power Blocks Distributors
High Voltage

Marathon HVPB Series are High Voltage (1500 AC/DC) versions of our traditional power block configurations. This series consists of a modular single pole design for splicer, distribution and studded connector styles.

Marathon Special Products Mini Bulk Fastening Power Blocks Distributors
Mini Bulk Fastening

Marathon Mini Bulk Fastening power block is available in many configurations to suit individual requirements. This product is ideal for power distribution options when terminating flexible stranded wire with crimp lugs for flexible bus bar.

Marathon Special Products Miscellaneous Configurations Power Blocks Distributors
Miscellaneous Configuration

Marathon Miscellaneous power blocks are part of our traditional NEMA style offering. These power blocks provide tapped holes or quickconnects in addition to bare wire terminals to splice or distribute power.

Marathon Special Products Splicer & Distribution Enclosed Power Blocks Distributors
Splicer/Distribution Enclosed

Marathon EPB Series are enclosed versions of our traditional power block configurations. This series consists of a modular single pole design that provides touch proof protection for splicer and distribution connector styles.

Marathon Special Products Splicer & Distribution NEMA Power Blocks Distributors
Splicer/Distribution NEMA

Marathon Splicer and distribution power blocks are our traditional NEMA style offering. Splicer power blocks provide the same number of wire inputs as outputs, and distribution power blocks provide multiple load outputs per each incoming wire(s).

Marathon Special Products Stud Configurations Power Blocks Distributors
Stud Configurations

Marathon Studded power blocks are part of our traditional NEMA style offering. These power blocks provide studs, or a combination of bare wire terminals with the stud, to terminate crimp lugs or bus bar to our power blocks to splice or distribute power.