MSHA - Code of Federal Regulations - 30 CFR A18.9990B
Skip to content
MSHA - Title 30 CFR
Appendix II


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.




FIGURE 1 TYPICAL LAYOUT DRAWING OF A MACHINE See MSHA Illus. 20



FIGURE 2--SAMPLE 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 2-G- _____________________________________
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)
Cable-Motor to Starter:
Cond. No. _____, ____"
O.D., ________' Long
Hose-Motor to Starter Cable:
____" I.D., ____" O.D., ____' Long
Portable Trailing Cable:
Type: _____________________________________
Cond. No. ____" O.D., ____' Long
Hose-for 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 ____" O.D., ____' Long
(Manufacturing Company)
or-as 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 x ________"
Wide x ________" 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

Date ____________
Inspector ______________________

MACHINE
Designation: ________________________________________________
Type: __________ Serial No._____________

MOTOR

Manufacturer: __________________________________________________
Serial No.: ____________ Type:____________________
Frame: _________________________________________
H.p._________, F.L. Speed: ____ Volts: ____ Amps. ____
Winding: ____ X/P No. ____ (or parts list designation).
Starter

Manufacturer: __________________________________________________
Serial No.: ____________ Type:____________________
H.p. ______ 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.




FIGURE 5--TYPICAL PLANE JOINT

See MSHA Illus. 21




FIGURE 6--TYPICAL COMBINATION JOINT

See MSHA Illus. 22




FIGURE 7--THREADED JOINT

See MSHA Illus. 23




FIGURE 8--TYPICAL THREADED STRAIGHT STUFFING, BOX AND PACKING
GLAND LEAD ENTRANCE WITH PROVISION FOR HOSE CONDUIT

See MSHA Illus. 24




FIGURE 9--TYPICAL SLIP-FIT ANGLE TYPE STUFFING BOX
PACKING GLAND LEAD ENTRANCE WITH HOSE CLAMP

TYPICAL SLIP-FIT STRAIGHT TYPE STUFFING BOX
AND PACKING GLAND LEAD ENTRANCE

See MSHA Illus. 25




FIGURE 10--TYPICAL SLIP-FIT ANGLE TYPE STUFFING BOX AND PACKING
GLAND LEAD ENTRANCE

TYPICAL PLUG FOR SPARE LEAD ENTRANCE HOLE

See MSHA Illus. 26





[33 FR 4660, Mar. 19, 1968, as amended at 42 FR 8373, Feb. 10, 1977; 42 FR 25855, May 20, 1977]