30 C.F.R. Appendix II to Subpart D of Part 18
Title 30 - Mineral Resources
Figure 2—Sample Bill of Material Bill of Material (Electrical) ___ Hp., ___ Volts, ___ Ph., ___ Cy., ___ R.P.M. X/P__________(Date). ______(Date) Extension. ____Hp., ____Volts. ______ Extension. Cable—Motor to Starter: Cond. No. ___, ___&inch; O.D., ___′ Long Hose—Motor to Starter Cable: ___&inch; I.D., ___&inch; O.D., ___ ′ Long Portable (Trailing) Cable— Cond. No. ___, ___&inch; O.D., ___′ Long Hose—for Portable Cable: ___&inch; I.D., ___&inch; O.D., ___′ Long Hose Clamps— 2 for Motor-Starter Hose conduit ___&inch; D 1 for Portable Cable Hose conduit __&inch; D* *Only when short length of hose is used. Trolley Tap— Model ______________ with ___-ampere fuse. Rail Clamps, 2. 1 Ground Clamp, Cat. No. ___ 1 Return Power Conductor, Cat. No. ___ Plug on outby end of potable cable for insertion into receptacle on distribution box or equivalent with short-circuit protective device set at ___ amperes. Static-free Belt Model Style Catalog No. ___, Guard for Belt— Overall Dimensions ___&inch; Long × ___&inch; Wide ×___&inch; High Note: The foregoing is intended as a guide. Additional electrical components used shall be completely identified. Figure 3—Material To Be Included With the Operating Instructions—on or With the Wiring Diagram Submitted to Each Customer (Sometimes referred to as “Caution Statement”) caution To retain “permissibility” of this equipment the following conditions shall be satisfied: 1. General safety. Frequent inspection shall be made. All electrical parts, including the portable cable and wiring, shall be kept in a safe condition. There shall be no openings into the casings of the electrical parts. A permissible distribution box shall be used for connection to the power circuit unless connection is made in fresh intake air. To maintain the overload protection on direct-current machines, the ungrounded conductor of the portable cable shall be connected to the proper terminal. The machine frame shall be effectively grounded. The power wires shall not be used for grounding except in conjunction with diode(s) or equivalent. The operating voltage should match the voltage rating of the motor(s). 2. Servicing. Explosion-proof enclosures shall be restored to the state of original safety with respect to all flame arresting paths, lead entrances, etc., following disassembly for repair or rebuilding, whether by the owner or an independent shop. 3. Fastenings. All bolts, nuts, screws, and other means of fastening, and also threaded covers, shall be in place, properly tightened and secured. 4. Renewals and repairs. Inspections, repairs, or renewals of electrical parts shall not be made unless the portable cable is disconnected from the circuit furnishing power, and the cable shall not be connected again until all parts are properly reassembled. Special care shall be taken in making renewals or repairs. Leave no parts off. Use replacement parts exactly like those furnished by the manufacturer. When any lead entrance is disturbed, the original leads or exact duplicates thereof shall be used and stuffing boxes shall be repacked in the approved manner. 5. Cable requirements. A flame-resistant portable cable bearing a MSHA assigned identification number, adequately protected by an automatic circuit-interrupting device shall be used. Special care shall be taken in handling the cable to guard against mechanical injury and wear. Splices in portable cables shall be made in a workmanlike manner, mechanically strong, and well insulated. Not more than five temporary splices are permitted in a portable cable regardless of length. Connections and wiring to the outby end of the cable shall be in accordance with recognized standards of safety. Figure 4—Sample Factory Inspection Form machine motor Hp.__ F.L. Speed:__ Volts:__ Amps._ Winding: ___ X/P No. ___ (or parts list designation). starter Hp. ___ Volts: ___ X/P No. ___ (or parts list designation). Short-circuit protection ___ amps. Overload-current protection ___ amps. portable cable Manufacturer: _________________ Type: ______ Conductors: _______ Length: ___ O.D. ___ MSHA No. ____ Is all wiring around machine adequately protected from mechanical damage? Note: Add appropriate material for each explosion-proof enclosure when more than a motor and starter are on a machine. [33 FR 4660, Mar. 19, 1968, as amended at 42 FR 8373, Feb. 10, 1977; 42 FR 25855, May 20, 1977]
Title 30: Mineral Resources
PART 18—ELECTRIC MOTOR-DRIVEN MINE EQUIPMENT AND ACCESSORIES
Subpart D—Machines Assembled With Certified or Explosion-Proof Components, Field Modifications of Approved Machines, and Permits To Use Experimental Equipment
Appendix II to Subpart D of Part 18
LIST OF FIGURES------------------------------------------------------------------------ Figure No. Title------------------------------------------------------------------------ 1 Typical layout drawing of a machine. 2 Sample bill of material (to accompany layout drawing shown on figure 1) 3 Material to be included with the operating instructions on or with the wiring diagram submitted to each customer. 4 Sample factory inspection form. 5 Typical plane joint. 6 Typical combination joint. 7 Typical threaded joint. 8 Typical threaded straight stuffing box and packing gland lead entrance with provision for hose conduit. 9 Typical slip-fit straight-type and angle-type stuffing box and packing gland lead entrance. 10 Typical slip-fit angle-type stuffing box and packing gland lead entrance and typical plug for spare lead entrance hole.------------------------------------------------------------------------
Motor: ____________________
Type: ______ Serial No. ____________________
Serial No.: ___ Type: ____________________
Frame: ____________________
Serial No. ___ Type:____________________
Metal tubing _____, Other ____________________
By removal of all sharp corners or edges? ____________________
Is wiring separated from hydraulic components? ____________________
Is an adequate insulated strain clamp provided for the portable cable? ____________________
Are all packing glands properly packed so that
Are lockwashers (or equivalent) provided for all explosion-proof enclosure fastenings? ____________________
Are all plane joints securely fastened so that an 0.005-inch feeler gage cannot be inserted?____________________
Are all threaded covers secured? ____________________
How? ____________________
Are all electrical connections secure ____and properly insulated where necessary? ____________________
