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and must be controlled by wall switches only. (u) For protection against rust nr corrosion, all steel or iron outlet boxes, junction boxes, cabinets, gutters, and similar type equipment subject to rust or corrosion, shall be protected with a zinc or cadmium coating by either the galvanizing or sherardizing process. (v) Wiring of slim line or end to end fixtures shall be as follows: Asbestos .l, 000 volt No. 14 wire or itlal No. .12 wire will be accepted for circuit wiring of fixtures that are installed end to end, to the extent of the supply of that circuit passing through fixture that it supplies. The only permitted use of the fixture as a raceway would be for those fixtures approved by the Underwriters for that purpose; with special raceways, and lil i No, i2 wiring would be accepted for additional circuits when installed according to this approval. Cas and oil burning equipment- Each unit shall be on a separ- ate circuit and be provided with a pilot light, and switch located near the entrance to the room where unit is installed. Minimum wire size No. 12 or larger. (w) Swimming pools; All conduits, junction boxes, reinforcing steel, filter pump equipment, lighting fixtures and sinillar metallic equipment must be bonded together and connected to a common ground. Metallic parts of ladders and diving boards must also be grounded. All underwater pool lights must be of approved low voltage type. Section 28. F l:i✓DERS. The carrying capacity of each feeder or subfeeder shall he based on the number of separate circuits which it supplies, computed as follows: (1) Overhead lighting circuits --assumed as having 1,000 watts per circuit for each 15 -amp. circuit. (2) Convenience outlet circuits --assumed as having 1, 000 watts per circuit. (3) Non -itemized and heavy duty circuit--spceified load for which designed. 29