TITLE 30 - MINERAL RESOURCES

CHAPTER I - MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR

SUBCHAPTER B - TESTING, EVALUATION, AND APPROVAL OF MINING PRODUCTS

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.

------------------------------------------------------------------------ (image) View or download PDF Figure 2Sample Bill of Material B. of M. No. ____ Date ______ Revision Date 1. ______ 2. ______ 3. ______ 4. ______ 5. ______ Bill of Material (Electrical) (Manufacturing Company) Model: ____________________ (Unit Name) Approval 2G ____________________ Motor: ____________________ (Manufacturing Company) Frame____________________ ___ Hp., ___ Volts, ___ Ph., ___ Cy., ___ R.P.M.

X/P__________(Date).

______(Date) Extension. Starter: ____________________ (Manufacturing Company) Model____________________ ____Hp., ____Volts. X/P (Date) ______ Extension. (Date) CableMotor to Starter: Cond. No. ___, ___ O.D., ___ Long HoseMotor to Starter Cable: ___ I.D., ___ O.D., ___ Long Portable (Trailing) Cable Type:____________________ Cond. No. ___, ___ O.D., ___ Long Hosefor Portable Cable: ___ I.D., ___ O.D., ___ Long Hose Clamps 2 for Motor-Starter Hose conduit ___ D 1 for Portable Cable Hose conduit __ D* *Only when short length of hose is used. Trolley Tap (Manufacturing Company) Model ______________ with ___-ampere fuse.

Rail Clamps, 2.

1 Ground Clamp, Cat. No. ___ (Manufacturing Company) 1 Return Power Conductor, Cat. No. ___ (Manufacturing Company) oras Optional 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. ___, (Manufacturing Company) Guard for Belt Material____________________ Overall Dimensions ___ Long ___ Wide ___ High Note: The foregoing is intended as a guide. Additional electrical components used shall be completely identified.

Figure 3Material To Be Included With the Operating Instructionson 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 4Sample Factory Inspection Form Date ______ Inspector ____________ machine Designation:____________________ Type: ______ Serial No. ____________________ motor Manufacturer: ____________________ Serial No.: ___ Type: ____________________ Frame: ____________________ Hp.__ F.L. Speed:__ Volts:__ Amps._ Winding: ___ X/P No. ___ (or parts list designation).

starter Manufacturer: ____________________ Serial No. ___ Type:____________________ 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? By hose conduit_____, Troughs ____________________ 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 1/8-inch clearance remains between packing nut and stuffing box? ____________________ 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? ____________________ Note: Add appropriate material for each explosion-proof enclosure when more than a motor and starter are on a machine. (image) View or download PDF (image) View or download PDF (image) View or download PDF (image) View or download PDF (image) View or download PDF (image) View or download PDF [33 FR 4660, Mar. 19, 1968, as amended at 42 FR 8373, Feb. 10, 1977; 42 FR 25855, May 20, 1977]