Structural · S-82B92

Bulkhead Enclosure Mounting and Grounding Detail at Roof HSS Column

Materials

Steel Stainless Steel Timber / Wood Metal (misc.)

Elements

Walls Doors Railings / Guards Roofs Ceilings Waterproofing / Flashing Connections / Plates Roof / Floor Openings

Connections

HSS Connection Bolted Connection

About this detail

A 36-inch high by 36-inch wide by 12-inch deep NEMA 4X stainless steel bulkhead enclosure is wall-mounted to a 10x10 hollow structural section tube steel member using three-eighths-inch stainless steel bolts, washers, and nuts. A waterproof seal is provided between the box and the tube steel to prevent water ingress. A 4x12 opening in the enclosure features a rubber collar around smoothed edges for cable protection alongside a waterproof cable gland. Inside, multiple polyphasers are mounted above a 4x4 by one-quarter-inch tinned copper angle secured to the stainless steel back panel. Grounding connections include a number 4/0 green ground wire from the bulkhead plate to the electrical entrance system, a 6 AWG green stranded ground to the enclosure door ground stud, and a Class II main-sized conductor routed to the nearest roof main conductor.

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