§ 29.70 - Minimum performance requirements.

Related Notices
- 94-29121. Proposed rule. 94-29121. Testing and Evaluation by Nationally Recognized Testing Laboratories and Use of Equivalent Testing and Evaluation Requirements; Proposed Rule DEPARTMENT OF LABOR

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(a) Continuous duty, warning light, portable methane detectors shall be self-contained units, practical in operation, portable and suitable for service in underground coal mines.

(b) The detector shall be equipped with an indicating device that contains one or more warning lights designed and constructed to flash in the presence of a methane-air mixture having a methane concentration of 1 percent ±0.2 percent.

(c) Detectors equipped with batteries shall be constructed so that when such batteries are filled, electrolyte will not spill during use.

(d) Battery containers shall be made of corrosion-resistant material.

                    
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