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RESOLUTION NO. 78-40 PAGE FOUR 18. Amendment to Section 336-11: This amendment is a corollary to the amendments of Sections 300-15(b) and 336t6, pre- cluding the use of "boxless systems" and devices for exposed cable installations. 19. Amendment to Section 348-1: The purpose of pro- hibiting the use of electrical metal tubing in concrete or under- ground is due to the following items: (1) corrosive soil preva- lent to the Orange County area; ~2) vibration by mechanical devices used during the pouring of concrete; ~3) sodium chloride additives and their corrosive effect; and (4) mechanical damage by workmen and equipment during the construction process. In the past elec- trical metallic tubing has been restricted to protected interior location because of corrosion of the tubing. Recently, due to practical experience of Code enforcement authorities, it has been determined that such tubing will perform safely where it is not directly exposed to the weather. (Cities closer to the ocean still accept such tubing only on the interior of a structure.) 20. Amendment to Section 350~2: The reason that flexible metal conduit should be prohibited in concrete or exposed to water is obvious. The flexible conduit is not impervious to moisture and would allow moisture to enter the raceway system creating a hazard. In addition, if it is poured in concrete, aggregate could work its way into the conduit and would knick and cut insulation during the pulling process. In the past few years aluminum flexible conduit has gained wide popularity due to its light weight. But it also is easily damaged and subject to a greater degree of corro- sion than the galvanized steel type. This amendment would allow only that length of flexible conduit which is necessary for main- tenance of equipment, movement, or vibration, and would not allow it to be used as an exposed, unlimited surface raceway system. 21. Amendment to Section 410-8: This amendment prohi- bits pull-chain lighting in clothes closets because the repair of pull-chain fixtures is difficult and impractical. When the switch- ing mechanism fails, either the fixture is abandoned or the lamp is screwed on and off by hand, creating a hazard. Furthermore, a person would frequently be required to enter the closet and locate the pull switch in the dark, subjecting himself to possible injury. 22. Amendment to Section 422-5: The purpose of this amendment is to provide adequate circuit capacity for the larger fixed appliances. The minimum 20 ampere circuit assures reliable and safe operation of the appliance without affecting other cir- cuits. In addition, it would allow replacement of one appliance with another requiring more current without costly rewiring of the circuit. The food waste grinder has become a necessary appliance for sanitary reasons, and if a circuit is not provided for it at the sink location initially, unsafe wiring is likely to be installed at a later date. 23. Amendment to Section 600-1: If future access to an electrical panel is not provided for in the installation of the sign circuit, unsafe wiring is usually found due to building design or sign location. In tke past unsafe wiring has been kept to a minimum by an empty conduit run to the roof or by other means provided for the sign circuit. BE IT FURTHER RESOLVED, that upon adoption of this reso- lution and Ordinance No. NS~416, the Clerk of the Council shall forward a copy of this resolution, together with a copy of the said ordinance to the Department of Housing and Community Develop- ment of the State of California for filing therewith.