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(a) Gas holders shall be constructed on the gasometer principle, the bell being suitably guided. The gas bell shall move freely without tendency to bind and shall have a clearance of at least 2 inches from the shell.
The gas holder may be located in the generator room, in a separate room or out of doors. In order to prevent collapse of the gas bell or infiltration of air due to a vacuum caused by the compressor or booster pump or cooling of the gas, a compressor or booster cutoff shall be provided at a point 12 inches or more above the landing point of the bell. When the gas holder is located indoors, the room shall be ventilated, heated, and lighted in accordance with Section 4807.
(b) When the gas holder is not located within a heated building, gas holder seals shall be protected against freezing.
(c) Means shall be provided to stop the generator-feeding mechanism before the gas holder reaches the upper limit of its travel.
(d) When the gas holder is connected to only one generator, the gas capacity of the holder shall be not less than one-third of the hourly rating of the generator.
NOTE: Authority cited: Section 142.3, Labor Code. Reference: 142.3, Labor Code.
1. New section filed 5-16-75; effective thirtieth day thereafter (Register 75, No. 20).
2. Amendment of NOTE filed 6-12-87; operative 7-12-87 (Register 87, No. 26).
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