Electrical · E-NCMWG

Lighting Pole Footing and Grounding Detail

Materials

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

Elements

Foundations / Footings Connections / Plates Reinforcing

About this detail

A concrete lighting pole footing has a maximum height of thirty-five feet, supported on an eighteen-inch diameter concrete footing extending five feet deep with a three-inch minimum clearance. The footing is reinforced with six number five vertical rebars, number four ties at twelve inches on center, and three number four hoop ties at one and a half inches on center near the top. Non-shrink grout is provided beneath the base plate, secured with three-eighths-inch thick by three-inch square plate washers with nuts top and bottom typical. PVC schedule forty conduits route circuit wiring and equipment ground conductors into the footing, accompanied by a bottomless concrete pullbox measuring twelve by eighteen by twelve inches with a four-inch gravel base and a lockable concrete lid stamped lighting. A number four bare copper stranded grounding conductor provides a minimum of twenty feet below grade per CEC 250.52-A-3 with bonding to the rebar.

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