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f D PrlaOie~ II I l llllllll Ill! 111 ' dla_ grams ehl ggg stn tfone and Sn underground ehope, lunchrooms, and elsewhere fn working areas where persona congregate; (b) Procedures to show how the min- ers will be notified of emergency; (c) An escape plan for each working area In the mine to Include Iastruc- tfone ehowSng how each working area should be evacuated. Each such Dlan shall be posted at appropriate shalt stations and elsewhere la working areas where persona congregate; (d) A fire fighting plan; (e) Surface procedure to follow fn an emergency, lncluding the notltlcatfoa of prover author) rice, preparing rescue equipment, and other equipment which may be used In rescue and recovery op- ( erationa; and (f] A statement of the avaflabillty of emergency communication and traas- portatfon Caclllties, emergency power and ventilation and locatl on of rescue personnel and equlDment. (Approved by the Utace of Managemsnt and Budget under coocrol number 121(F-0Ota) 467.1t064 Cammunlcation with reArge chambers. Telephone or other voice communica- tion shall be provided between the sur- face and re111ge chambers and each eys- tema shall be Independent of the mine power suDP1Y. 467,11066 Inclined escapeways- Any portion Of a designated escapeway which Is inclined more than 30 degrees from the horizontal aad that le more than 300 feet Sn vertical extent •ehall be provided with an emergency hofeting facility. 467.11068 Emergency holrta The procedure Cor lnepectfon, testing and mal ntenance required by standard 57.19120 shall be utf llzed at least every 30 days for hofate deafgnated u emer- gency hoists 1n any evacuation Dlan. g 67.11058 Check•In, checkout system, Each operator of as underground mine shall establleh a check-ta aad check-out system which shall provide an accurate record of peraoae Sn the mine. These records shall be keot on the surface in a place chosen to minf- 30 CFR Ch. 1 (7-1-94 maze the danger of dead or other hazards. Every ground ehgll carry a Doe being IdentSfled. 467.11068 ]]esplrable ai hoist operators under For the protection of opBraE hofate located underground wino part of the mine escape and evao plan required under standard .67 the holet operator shall be y{e. with a respirable atmosphere pletely independent of the mine~4 Dhere. This Independent veatd system shall convert, without coII Harlon, to an aDDroved and Dro malatalned 2-hour self-con breathSng apparatus to provide a~• means of escape for the hoist dperdl~ after the hofeting duties have +btl~l completed u prescribed !n the mla9(~ cape and evacuation plan forg hoist. The hoist operator's SndeDend~ veatflatfon system shall be provid one of the following methods: (a) A suitable ancloevre egi3l with a poeltlve preaeure ventila eyetem which may be operated tinuously or be capable of immedlA actlvatton Rom within the eacloe durtng an emergency evacuatloar~ for the enclosure's ventilation eyet9g shall be provided 1n one of the folloin 1ng ways: ,,,~y~ (1) Air cour,0ed from the eue[e°~ through a borehole Into the hofettd~ closure directly or through a me pipeline from such borehole; or (2) Alr coursed liom the eui through metal duct work Into the hefe~ enclosure, although thfe duct ldo'r shall not ba located 1n timber-cup ported active workings; or ~ ~~ (3) Afr supplied by air comDreaeoie located on the surface and coursed through metal pipe Into the hoist en- closure. A back-up eyecem shall be provided for a holet enclosure ventilation sys- tem provided by either of the methods eat torch In paragraphs (a) (2) and (3) of this section. Th1e back-up system shall corselet of compressed air stored In coa- tafnera conaected~to the enclosure. Th1e back-up system shall provide and maintain a respirable atmosphere fa the enclosure for a Harrod of time emiaf to at least twice the time necessary to 422 Safety and Hea@h Admin., Labor Mete the evacuation of all pereone ;Hated to use that hofet ea pre- ~ed in the mine escape aad evacu- i plan required under standard D53; or An approved and properly maln- fd salt-contained breathSng aDDara- eyetem which shall consist of a c connected to compressed air :d fn containers ad)acent to the controls. The self-contained thing system shall provide a mtnl- f of 29 hours of respirable atmos- e to the holet operator. In addf- the self-contained breathing sys- ahall be capable of a quick connect the approved 2-hour self-contaf ned thing aDParatua above. Subpart K-EleChicity SURFACE AND UNDEROAOUND ;001 cireult overload protection. CSrcutta shall be protected agafnet ;ceeeSVe overloads by fusee or circuit ~eakera of the correct type and capac- Controls aad switches. Electric equlDment and cireuf to shall be provided with switches or other con- trols. Such switches or controls shall be of approved design and construction and shall be properly Installed. Trailing cable overload Dro• Individual overload Drotectfon or short circuit protection shall be Dro- vlded for the trailing cables of mobile equipment. 467.I2004 Electrical conductors. Electrical conductors shall be of a aufflclent size and current-carrying ca- pacity to ensure that a rise in tempera- ture resulting from normal operations will not damage Che insulating mate- rfale. Electrical conductors exposed to mechanical damage shall be protected. 467.12006 Protection of power conduc- tors from mobile equipment. Mobile equipment shall not run over power conductors, nor shall loads be dragged over power conductors, unless the conductors are properly bridged or protected. §57.12013 467.12008 Dirtrlbutlon bozee. Dietrlbutlon boxes shall be provided with a dlsconnecting device Cor each branch circuit. Such dlsconnecting de- vices shall be equipped or designed In such a manner that it can be deter- mined by visual observation when each a device Se open and that the cireult fe deenerglzed, and the distribution box shall be labeled to show which circuit each device controls. 467.12007 Junction boz connection procedures. Trailing Cable and power-cable con- nections to junction boxes shall not be made or broken under load. 467.12008 Inaulatioa end flttinge [or power wires and cables. Power wires and cables shall be lnsu- ]aced adequately where they pass into or out of etectrlcal compartments. Ca- bles shall enter meta] frames of mo- tors, splice boxes, and electrical com- paztments only through proper fit- tings. When Insulated wlree, other than cables, pass through metal frames, the holes shall be aubataatially bushed with insulated buehinga. 467.12010 Isolation or Insulatloa of commualcatfon coaducton. Telephone and law-potential signal wire shall be protected, by lsolatlon or suitable fnsulatfon, or both, from con- tacting energl zed power conductors or any other power source. 467.12011 Hlgh-poteat[el electrical conductors. High-potential etectrlcal conductors shall be covered, 1nsWated, or placed to prevent contact with low potential conductors. 457.12012 Bare signal wires, The potential on bare signal wires ac- cessible to contact by persons shall not exceed 48 volts. 4 67.12013 Splices and ropein of power ceblee. Permanent splices and repairs made Sn power cables, lncluding the ground conductor where provided, eha11 be- (a) Mechanically strong with elec- trical conductlvlty as near fls possible to chat of Lhe original: 923