Marathon 135 Series Power Distribution Blocks
The 135 Series Power Distribution Blocks have adequate spacing for most OEM and field applications due to their meeting UL 1953 (Power Block Standard) requirements. They are listed for general installation, and they meet the feeder circuit terminal spacing requirements per UL508A section 10.2 (which is 1" through air and 2" over surface at 600V), so they can be used in "as supplied condtion". The UL identifier on each block would also allow an inspector to complete an inspection faster, since there would be no need to check "conditions of acceptability".
The 135 Series Power Distribution Blocks comply with National Electric Codes (NEC) for use in service equipment, so they are suitable for applications where system components must be connected in the field, including industrial control panel feeder/branch circuits, splicing and tapping conductors in junction boxes, termination boxes, and similar applications. Since these blocks are UL Listed and service equipment rated, they can be used in the connection of modular tower sections for wind turbines, for large motor connections such as water lifting and material handling, and for interconnection of multiple panels in control and power distribution systems.
Electrical
- Provides feeder circuit terminal spacing up to 1" through air and 2" over surface
- Rated for 600 Volts (AC/DC) per UL508A, Section 10
- Amperage Ratings up to 950A for copper wire and 770A for aluminum wire
- Line side accepts up to (2) 750 kcmil wires, per phase
- Load side accepts up to (2) 750 kcmil, (6) 250 kcmil, (8) 3/0, or (10) 2/0 wires, per phase
- Rated for flexible stranded copper wire (UL Class G/H/I/DLO) as well as copper and aluminum "code" wire (UL Class B & C)
Mechanical
- High-impact resistant thermoplastic insulator base, flame retardant and heat resistant
- Rated UL 94-V-0
- UL Termperature Rating 125°C
- Mounting: panel mount
- Touch-proof hinge cover optional
Certifications
- UL Listed, Investigated to UL 1953, File QPQS.E309401
- UL Recognized File No. XCFR2.E62806, XCFR8.E62806
- Short Circuit Current Ratings (SCCR) up to 100,000 SYM Amps
- CSA Certified (pending), CSA 22.2 No. 158, File 019766_0_000
- RoHS Compliant
The majority of Marathon's products have been tested and comply to UL requirements for use with flexible stranded wires, have short-circuit current ratings (SCCR) and are CE 1000 Volt AC/DC rated. For more information, see Flexible Stranded Wire.