Electrical · E-XSCDS

L-868B Junction Box Detail

Materials

Concrete Reinforced Concrete Steel Stainless Steel Masonry / CMU Metal (misc.)

Elements

Drainage Reinforcing

Connections

Welded Connection Bolted Connection

About this detail

This electrical installation detail shows a L-868 base class 1B junction box set within a concrete envelope, drainage layer, and base course. The assembly includes a 610-millimeter bottom section with a 90-millimeter extension ring, a 305-millimeter diameter base, and a flange ring with a concrete dam backed by high-performance non-shrink grout. Four anti-rotating bars are positioned at each base, along with internal and external ground lugs connected to a bare copper ground wire and rebar cage via an exothermic weld and ground rod. The top cover consists of a 19-millimeter stainless steel cover with a temporary mudplate for asphalt overlay.

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