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SECTION 42: That the Santa Ana Municipal Code is hereby amended by amending Section 8-953 thereof to read as follows: Section 8-953. Riqid Metal Conduit. Section 346-1 of the National Electrical Code, Edition, is hereby amended to read as follows: 1968 346-1. Use. Rigid metal conduit may be used under all atmospheric conditions and occupancies, except that ferrous raceways and fittings protected from corrosion solely by enamel may be used only indoors and in occupancies not subject to severe corrosive influences. Where practicable, dissimilar metals in contact anywhere in the system shall be avoided to eliminate the possibility of galvanic action. (See Section 300-5 for limitation in the use of ferrous raceways and fittings protected from corrosion solely by enamel) . Unless made of a material judged suitable for ~e condition, or unless corrosion protection approved for the condition is provided, ferrous or non-ferrous metallic conduit, elbows, couplings, and fittings shall not be installed in concrete or in direct contact with the earth, or in areas subject to severe corrosive influences. Rigid metal conduit installed underground shall be buried a minimum of one foot under grade level unless protected by an approved method. SECTION 43: That the Santa Ana Municipal Code is hereby amended by amending Section 8-969 thereof to read as follows: Section 8-969. Electrical Metallic Tubinq. Section 348-1 of the National Electrical Code, Edition, is hereby amended to read as follows: 1968 348-1. Use. Electrical metallic tubing may be used for both exposed and concealed work. Electrical metallic tubing protected from corrosion solely by enamel shall not be used. Electrical metallic tubing shall not be used (1) where, during installation or afterwards, it will be subject to severe physical damage; (2) for installation underground, in concrete, or where exposed to the weather, or excessive moisture. Where practicable, the use of dissimilar metals throughout the system shall be avoided to eliminate the possibility of galvanic action. (See Section 300-5 for limitation in the use of ferrous raceways and fittings protected from corrosion solely by enamel). SECTION 44: That the Santa Ana Municipal Code is hereby amended by amending Section 8-979 thereof to read as follows: Section 8-979. Flexible Metal Conduit. Section 350-2 of the National Electrical Code, Edition, is hereby amended to read as follows: 1968 350-2. Use. Flexible metal conduit shall not be used (1) in wet locations, unless conductors are of the lead- covered type or of other type specifically approved for the conditions; (2) in hoistways, except as provided in Section 620-21; (3) in storage battery rooms; (4) in any hazardous location except as permitted in Secti6ns 501-4(b), 502-4, and 503-3; (5) where rubber-covered conductors are exposed to oil, gasoline, or other materials having a deteriorating effect on rubber; (6) for installation underground, exposed to the water, embedded in masonry, concrete, adobe, plaster, or similar finish; nor (7) where exposed to physical damage. -21-