Title :
Investigation and Testing of Footing-Type Grounding Electrodes for Electrical Installations
Author_Institution :
Underwriters´´ Laboratories, Inc., Santa Clara, Calif.
Abstract :
Footing-type grounding electrodes installed in the concrete foundations of residential and small commercial buildings designed to meet a maximum ground resistance value of 5 ohms are described. Bare solid copper electrode wires of various lengths, steel reinforcing rods, and 10-foot lengths of hot galvanized rigid steel conduit were used to determine the resistance values.
Keywords :
Buildings; Concrete; Copper; Electric resistance; Electrodes; Grounding; Solids; Steel; Testing; Wires;
Journal_Title :
Power Apparatus and Systems, IEEE Transactions on
DOI :
10.1109/TPAS.1964.4765938
