• § 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.