I am wiring this building it is fairly small. The building is being fed from an existing buiding about 450' away. The building does not have a footer but it has about 12 foootings for the columns to set on. What do you do in this sinario for a concrete encase electrode?
grounding electrode
- Thread starter shaw0486
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shepelec
Senior Member
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- Palmer, MA
Of course the "ideal" time to install a CCE is before the footings are poured.
well of course if the building is pre existing and the concrete is poured it would be somewhat difficult to establish a cce. Why did you even enquire??
as Roger stated the steel must be 20 feet at or near the bottom
(3) Concrete-Encased Electrode. An electrode encased by at least 50 mm (2 in.) of concrete, located horizontally near the bottom or vertically, and within that portion of a concrete foundation or footing that is in direct contact with the earth, consisting of at least 6.0 m (20 ft) of one or more bare or zinc galvanized or other electrically conductive coated steel reinforcing bars or rods of not less than 13 mm (1/2 in.) in diameter, or consisting of at least 6.0 m (20 ft) of bare copper conductor not smaller than 4 AWG. Reinforcing bars shall be permitted to be bonded together by the usual steel tie wires or other effective means. Where multiple concrete-encased electrodes are present at a building or structure, it shall be permissible to bond only one into the grounding electrode system.
IMO if you have 4- 5 foot vertical sections amongst 4 footers or so you could tie them (bond) them to gether to form the required 20 feet.
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