Subpart B - Construction and Design Requirements  


§ 18.20 - Quality of material, workmanship, and design.
§ 18.21 - Machines equipped with powered dust collectors.
§ 18.22 - Boring-type machines equipped for auxiliary face ventilation.
§ 18.23 - Limitation of external surface temperatures.
§ 18.24 - Electrical clearances.
§ 18.25 - Combustible gases from insulating material.
§ 18.26 - Static electricity.
§ 18.27 - Gaskets.
§ 18.28 - Devices for pressure relief, ventilation, or drainage.
§ 18.29 - Access openings and covers, including unused lead-entrance holes.
§ 18.30 - Windows and lenses.
§ 18.31 - Enclosures - joints and fastenings.
§ 18.32 - Fastenings - additional requirements.
§ 18.33 - Finish of surface joints.
§ 18.34 - Motors.
§ 18.35 - Portable (trailing) cables and cords.
§ 18.36 - Cables between machine components.
§ 18.37 - Lead entrances.
§ 18.38 - Leads through common walls.
§ 18.39 - Hose conduit.
§ 18.40 - Cable clamps and grips.
§ 18.41 - Plug and receptacle-type connectors.
§ 18.42 - Explosion-proof distribution boxes.
§ 18.43 - Explosion-proof splice boxes.
§ 18.44 - Non-intrinsically safe battery-powered equipment.
§ 18.45 - Cable reels.
§ 18.46 - Headlights.
§ 18.47 - Voltage limitation.
§ 18.48 - Circuit-interrupting devices.
§ 18.49 - Connection boxes on machines.
§ 18.50 - Protection against external arcs and sparks.
§ 18.51 - Electrical protection of circuits and equipment.
§ 18.52 - Renewal of fuses.
§ 18.53 - High-voltage longwall mining systems.
§ 18.54 - High-voltage continuous mining machines.