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RU Solar String Transition Box, 7.31x7.31x4.92, Light Gray, Fiberglass

  • More reliable than using wire nuts, U-joints, or wire taps
  • Mountable beneath the PV array
  • Works with most microinverter brands
  • Works with string inverters and optimizers.
  • Twenty year usable outdoor life
  • Reduces overall cable and wire BOS costs
  • Simplifies installation and commissioning while reducing labor costs
  • Terminal Wire Size Range (One Conductor) : (1) #6-#24
  • Wire Size Range (Two Conductors): (2) #20-#12
  • For RU-2 and RU-2-LP, (4) 2-Prong Jumpers
  • RU-2-LPLT available standard without terminal blocks
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Catalog #:


RU Solar String Transition Box


  • Height: 7.31 in / 186 mm
  • Width: 7.31 in / 186 mm
  • Depth: 4.92 in / 125 mm
  • Protection Rating: NEMA Type 3; NEMA Type 3R; NEMA Type 4; NEMA Type 4X
  • Material: Fiberglass
  • Finish: Smooth Matte
  • Color: Light Gray
  • Color Code: RAL 7035
  • Thickness: 0.13 in / 3.3 mm
  • Terminal Block: Yes
  • Nominal Voltage: 600 V
  • Nominal Voltage Type: AC/DC
  • Connector Type: Spring Clamp
  • Max Current: 57 A
  • Weight: 3 lb


Residential Transition Boxes enable installers to transition and/or combine strings to conduit, reducing costs by enabling installers to switch to standard building wire and simplifying connections in the enclosure. It provides a touch-safe and secure means to transition strings. The low profile enclosure is designed to be mounted beneath the array using the optional box bracket accessory or adjacent to the array using racking system accessories.

RU-2-LPLT available standard without terminal blocks



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