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EXCEPTION NO. 1. When remodeling existing occupancies if changed to a different classification as defined by "Table of Groups of Occupancy", then the said protective devices may be located at one central point. EXCEPTION NO. 2. Branch circuit protective devices for single family residence. NOTE: Nothing contained in this Code shall be deemed or construed to permit the installation of any electrical device outlet or circuit in any occupancy, the control of or the protection of which is not accessible tothe~ occupant at all times and no part of any circuit shall supply electrical energy to more than one occupancy. SECTION 39: That the Santa Ana Municipal Code is hereby amended by repealing and re-enacting Section 8-916 thereof to read as follows: Sec. 8-916. Made Electrodes. Section 250-83 of the National Electrical Code, 1968 Edition, is hereby repealed and re-enacted to read as follows: 250-83. MADE ELECTRODES. Where electrodes described in Section 250-81 and 250-82 are not available, the grounding electrode shall consist of: 1. A number 4 steel reinforcing bar, or an approved equal, a minimum of 20 feet long embedded in the building concrete foundation. The bar shall be located in the bottom of the footing with a minimum concrete covering of three (3) inches, measured from the underside. One end of the bar shall extend out of the foundation adjacent to the equipment to be grounded to permit the grounding conductor to be secured by an approved method. EXCEPTION: Where the above method is not practical, the following electrodes may be used upon approval of the enforcing authority. (a) Plate Electrodes. Each plate electrode shall present not less than 2 square feet of surface to exterior soil. Electrodes of iron or steel plates shall be at least 1/4 inch in thickness. Electrodes of nonferrous metal shall be at least 0.06 inches in thickness. (b) ~ipe Electrodes. Electrodes of pipe or conduit shall be not smaller than of the 3/4 inch trade size and where of iron or steel, shall have the outer surface galvanized or otherwise metal-coated for corrosion protection. (c) Rod Electrodes. Electrodes of rods of steel or iron shall be at least 5/8 inch in diameter. Approved rods of nonferrous materials or their approved equivalent used for electrodes shall be not less than 1/2 inch in diameter. SECTION 40: That the Santa Ana Municipal Code is hereby amended by amending Section 8-928 thereof to read as follows: Section 8-928. Metal Clad Cables. Section 334-6 of the National Electrical Code, 1968 Edition, is amended to read as follows: 334-6. USE. Except where otherwise specified else- where in this Code, and where not subject to physical damage, metal clad cable may be installed for branch circuits and feeders in concealed work as follows: (a) Type MC This type of power cable may be used in partially protected areas such as in continuous rigid cable supports and the like in dry locations and when any of the following conditions are met it may be used in wet locations: -19-