Current through Register Vol. XLI, No. 25, June 21, 2024
Section 36-4-10 - Construction and Rehabilitation Work And Requirements10.1. Where construction or rehabilitation work is being performed with person in by on the same ventilating split of air such as, cleaning of haulage roads, roof bolting, the cleaning of falls, the installation of structural materials and other related assignments similar to the aforementioned, and the use of face equipment is necessary to perform such work, the following procedures shall be followed: 10.1.1. Such mining equipment shall not operate where any bare exposed energized trolley or feeder wires are present.10.1.2. When trolley and feeder wires are present, a certified electrician shall be designated to de-energize such trolley and feeder wire in the area where such equipment is operating. De-energizing devices in the D.C. trolley and feeder wire system shall be opened, locked out with an approved device and suitably tagged by a designated certified electrician. A designated certified electrician shall be the person who removes the danger tags, locking devices and restores the electrical power to the trolley and feeder wires in a specific area when the work has ceased or been completed.10.1.3. A distance of twelve (12) inches minimum clearance shall be maintained between the machine being operated and any energized high voltage cables and insulated D.C. feeder cable.10.1.4. Operative communications shall be provided at the site while persons are working in the construction and rehabilitation areas from the work site to the surface. 10.1.5. Four (4) twenty (20) lb. ABC fire extinguishers and first-aid supplies shall be provided at the work site. Such extinguishers shall be placed where they are readily accessible. The first-aid supplies listed below shall be maintained within five hundred (500) feet of the site.10.1.5.a. The first-aid equipment required to be maintained shall include at least the following: 10.1.5.a.1. One (1) stretcher.10.1.5.a.2. One (1) broken-back board.10.1.5.a.3. Twenty-four (24) triangular bandages. 10.1.5.a.4. Eight (8) four-inch bandage compresses.10.1.5.a.5. Sixteen (16) two-inch bandage compresses.10.1.5.a.6. Twelve (12) one-inch adhesive compresses.10.1.5.a.7. One (1) foille.10.1.5.a.8. Two (2) cloth blankets.10.1.5.a.9. One (1) rubber blanket.10.1.5.a.10. Two (2) tourniquets.10.1.5.a.11. One (1) one-ounce bottle of aromatic spirits of ammonia.10.1.5.a.12. Two (2) inflatable plastic arm splints.10.1.5.a.13. Two (2) inflatable plastic leg splints.10.1.5.a.14. Six (6) small splints, metal or wooden.10.1.5.a.15. Two (2) cold packs.10.1.5.b. All first-aid supplies required to be maintained under this section shall be stored in suitable sanitary, dust-proof, moisture-proof containers and such supplies shall be accessible to the miners. TABLE 36-4A
Short circuit protection; ratings and settings of circuit breakers.
Conductor size AWG or MCM | Maximum allowable circuit breaker instantaneous setting (amperes) |
14 | 50 |
12 | 75 |
10 | 150 |
8 | 200 |
6 | 300 |
4 | 500 |
3 | 600 |
2 | 800 |
1 | 1000 |
1/0 | 1250 |
2/0 | 1500 |
3/0 | 2000 |
4/0 | 2500 |
250 | 2500 |
300 | 2500 |
350 | 2500 |
400 | 2500 |
450 | 2500 |
500 | 2500 |
TABLE 36-4B
SHORT CIRCUIT PROTECTION; DUAL ELEMENT FUSES; CURRENT RATINGS; MAXIMUM VALUES
| Single Conductor Cable | Two Conductor Cable |
Conductor Size (AWG or MCM) | Ampacity | Max. Fuse Rating | Ampacity | Max. Fuse Rating |
14 | | | 15 | 15 |
12 | | | 20 | 20 |
10 | | | 25 | 25 |
8 | 60 | 60 | 50 | 50 |
6 | 85 | 90 | 65 | 70 |
4 | 110 | 110 | 90 | 90 |
3 | 130 | 150 | 105 | 110 |
2 | 150 | 150 | 120 | 125 |
1 | 170 | 175 | 140 | 150 |
1/0 | 200 | 200 | 170 | 175 |
2/0 | 235 | 250 | 195 | 200 |
3/0 | 275 | 300 | 225 | 225 |
4/0 | 315 | 350 | 260 | 300 |
250 | 350 | 350 | 285 | 300 |
300 | 395 | 400 | 310 | 350 |
350 | 445 | 450 | 335 | 350 |
400 | 480 | 500 | 360 | 400 |
450 | 515 | 600 | 385 | 400 |
500 | 545 | 600 | 415 | 450 |
TABLE 36-4C
| Single conductor cable | Two conductor cable |
CABLE SIZE | MAX. BRK. SETTING | MAX. CABLE LENGTH | AMPACITY | MAX. FUSE RATING DE |
14 | 50 | --- | 15 | 15 |
12 | 75 | --- | 20 | 20 |
10 | 150 | --- | 25 | 25 |
8 | 200 | --- | 50 | 50 |
6 | 300 | 550 | 65 | 70 |
4 | 500 | 600 | 90 | 90 |
3 | 600 | 650 | 105 | 110 |
2 | 800 | 700 | 120 | 125 |
1 | 1000 | 750 | 140 | 150 |
1/0 | 1250 | 800 | 170 | 175 |
2/0 | 1500 | 850 | 195 | 200 |
3/0 | 2000 | 900 | 225 | 225 |
4/0 | 2500 | 1000 | 260 | 300 |