Importance of MSHA Approval for Electrical Safety in Mining

1. Bud Page Electrical Engineer Electrical Safety Division

2. MSHA Approval and Certification CenterOrganizational Chart

3. Why do you need MSHA approval?

4. Federal Mine Safety & Health Act of 1977,Public Law 91 ‑173,as amended by Public Law 95 - 164 • Sec. 305. (a)(1) requires that all electric face equipment which is taken into or used inby the last open crosscut of any mine classified as gassy shall be permissible.

5. Federal Mine Safety & Health Act of 1977,Public Law 91‑173, as amended by Public Law 95 - 164 SEC. 318 DEFINITIONS (i) "permissible" as applied to electric face equipment means all electrically operated equipment taken into or used inby the last open crosscut of an entry or a room of any coal mine the electrical parts of which, including, but not limited to, associated electrical equipment, components, and accessories, are designed, constructed, and installed, in accordance with the specifications of the Secretary, to assure that such equipment will not cause a mine explosion or mine fire,...

6. Federal Mine Safety & Health Act of 1977,Public Law 91‑173,as amended by Public Law 95 - 164 SEC. 318 DEFINITIONS (i) "permissible” (continued) …and the other features of which are designed and constructed, in accordance with the specifications of the Secretary, to prevent, to the greatest extent possible, other accidents in the use of such equipment;

7. The Secretary’s Specifications are Codified in 30CFR Subchapter B - Testing, Evaluation, and Approval of Mining Products Part 18 Electric Motor-Driven Mine Equipment and Accessories Part 22 Portable Methane Detectors Part 23 Telephones and Signaling Devices Part 27 Methane Monitoring Systems Part 19 Electric Cap Lamps Part 20 Electric Mine Lamps other than Standard Cap Lamps Part 7, Subpart D Multiple-Shot Blasting Units

8. 30CFR Part 18 recognizes three types of protection techniques: • Explosion-Proof Enclosures • Contains an explosion • Potted Enclosures • Excludes explosive gas from circuit • Intrinsically Safe Circuits • No ignition source

9. What is an intrinsically-safe circuit? 30CFR 18.2 Definitions: “Intrinsically safe”means incapable of releasing enough electrical or thermal energy under normal or abnormal conditions to cause ignition of a flammable mixture of methane or natural gas and air of the most easily ignitable composition.

10. How does MSHA determine if a circuit is Intrinsically-Safe? • 30CFR 18.68 “Tests for intrinsic safety” • ACRI2001 “Criteria for the Evaluation and Test of Intrinsically Safe Apparatus and Associated Apparatus” • Supplements 30 CFR • Similar to ANSI/UL-913 Fourth Edition Documents available from MSHA’s Internet site: www.msha.gov

11. Should I apply for... Intrinsic safety Evaluation? Certification? Experimental Permit? MWMS Classification? Approval?

12. Apply for a Part 22 Approval if your product: • Is a portable methane detector • also portable multi-gas detectors that include a methane gas sensor; • Displays concentration in % methane; and, • Detects methane concentrations between 0.25% and 2% methane-in-air. • Accuracy up to 5% is recommended • Warns if the maximum concentration has been exceeded, low battery condition, or if the sensor malfunctions

13. Apply for a Part 23 Approval if your product: • Is a telephone or signaling device; • Provides wired or radio communications; and, • Is battery-powered or has a battery backup Examples: portable RF transceivers, remote fire and heat detector systems, “leaky-feeder” communication systems

14. Apply for a Part 18 Approval if your product: • Is not a portable methane detector (Part 22) or a telephone or signaling device (Part 23); • Is a “stand-alone” device having an internal power source; and • Does not connect to any other electrical device, unless specifically evaluated for intrinsic safety when connected to that device Examples: dust pumps, audio dosimeters, oxygen deficiency meters, toxic gas detectors, blaster’s galvanometers, radio remote control transmitters

15. Apply for a Part 27 Certification if your product: • Is a continuous duty, machine-mounted, methane monitor; • Actuates an audible or visual alarm when 1.0-1.5% methane is detected; and, • Activates a power shut-off component at methane concentrations greater than 2.0%

16. Apply for a Part 18.82 Experimental Permit if your product: • Is limited to a small number of devices that will be used in a mine for a short time usually for evaluation purposes or for a non-recurring application. MSHA may waive certain tests based on test reports from a reputable testing agency Each device is inspected by MSHA Limitations: • Issued only to the user of the equipment • Expires in 6-months (may be renewed an additional 6-months)

17. Apply for a Mine-Wide Monitoring System Classification if your product: • Is an intrinsic safety barrier to be used in a MWMS; • Is a sensor to be used in a MWMS; or, • Is a Mine-Wide Monitoring System

18. Apply for an Intrinsic Safety Evaluationif your product: • Is not a complete, “stand-alone” device; • Is line-powered or can be connected to line power inby; • Can be connected to another device inby that has not been evaluated for intrinsic safety with your product; or, • Is a component of a permissible machine or system (e.g., associated apparatus, remote control receiver, etc.)

19. How do I submit an application? • MSHA has published a Standard Application Procedure for the Approval or Intrinsic Safety Evaluation of Intrinsically Safe Apparatus and Associated Apparatus Per 30 CFR Part 18 (ASAP2016) A copy of this procedure is in your Workshop Packet and can be downloaded from the MSHA website at: www.msha.gov/techsupp/acc/application

20. How do I apply for MSHA approval?Per ASAP2016 submit the following: • Application Letter • Documentation • Drawing List • Checklist • Test samples • Quality Assurance • Other information

21. How do I apply for MSHA approval?Per ASAP2016 submit the following: • Application Letter • Documentation • Drawing List • Checklist • Test samples • Quality Assurance • Other information

24. Application Letter Documentation Drawing List Checklist Test samples Quality Assurance Other information Assembly drawings Schematic diagrams Electrical parts lists Layout drawings PC board artwork drawings Block diagram Technical description of circuit operation Operator's manual How do I apply for MSHA approval?Per ASAP2016 submit the following:

25. Application Letter Documentation Drawing List Checklist Test samples Quality Assurance Other information Each drawing: Title Drawing number Date In English Sheet number (multi-sheet) Revision level or date “Do not change without MSHA approval” Legible How do I apply for MSHA approval?Per ASAP2016 submit the following:

26. Application Letter Documentation Drawing List Checklist Test samples Quality Assurance Other information The drawings shall be adequate in number and detail to identify fully the complete assembly, component parts, and subassemblies (18.6(e)). Diagrams must clearly show which circuits must be located either in fresh-air or in an MSHA-certified explosion-proof enclosure. How do I apply for MSHA approval?Per ASAP2016 submit the following:

27. Application Letter Documentation Drawing List Checklist Test samples Quality Assurance Other information Specifications for Protective Components: Transformers Current-limiting resistors Blocking capacitors Shunt protective components fitted to inductive elements Optical isolators How do I apply for MSHA approval?Per ASAP2016 submit the following:

28. Application Letter Documentation Drawing List Checklist Test samples Quality Assurance Other information Energy-storing components: Batteries Capacitors Inductive components inductors, chokes, coils motors transformer windings Piezo-electric devices How do I apply for MSHA approval?Per ASAP2016 submit the following:

29. Application Letter Documentation Drawing List Checklist Test samples Quality Assurance Other information Heat producing components: Hot filament components light bulbs catalytic gas sensing elements Low-value resistors Solid state voltage- and current- limiting devices How do I apply for MSHA approval?Per ASAP2016 submit the following:

30. Application Letter Documentation Drawing List Checklist Test samples Quality Assurance Other information Other components: Fuses and other thermal protection devices Relays Heat sinks Miscellaneous components How do I apply for MSHA approval?Per ASAP2016 submit the following:

31. Application Letter Documentation Drawing List Checklist Test samples Quality Assurance Other information RECOMMENDATIONS: Generic description of non-critical components Schematics w/o component values Parts list specifying a range of values for non-critical components Submit “marked-up” drawings showing changes made to drawings on file Note: “Clean” drawings must be submitted for filing How do I apply for MSHA approval?Per ASAP2016 submit the following:

32. How do I apply for MSHA approval?Per ASAP2016 submit the following: • Application Letter • Documentation • Drawing List • Checklist • Test samples • Quality Assurance • Other information

35. Application Letter Documentation Drawing List Checklist Test samples Quality Assurance Other information Administrative Technical Leave no blanks. If a particular item does not apply, use the designation N/A Sign and date the form How do I apply for MSHA approval?Per ASAP2016 submit the following:

36. Application Letter Documentation Drawing List Checklist Test samples Quality Assurance Other information One complete instrument or device Three of each type inductive component Three battery assemblies Ten current-limiting resistors Thirty lamp bulbs Five piezo-electric devices Ten fuses or other thermal protective device Ten protective optical-isolators Five protective transformers How do I apply for MSHA approval?Per ASAP2016 submit the following:

37. Application Letter Documentation Drawing List Checklist Test samples Quality Assurance Other information Factory Inspection Form Demonstrates quality control program at place of manufacture Insures product is constructed and assembled according to design submitted to MSHA Certified Statement of Compliance In lieu of Factory Inspection Form Obligates approval-holder to conduct regular inspections of product to assure they are made and assembled in strict accordance with approval. How do I apply for MSHA approval?Per ASAP2016 submit the following:

38. Application Letter Documentation Drawing List Checklist Test samples Quality Assurance Other information How do I apply for MSHA approval?Per ASAP2016 submit the following:

39. Application Letter Documentation Drawing List Checklist Test samples Quality Assurance Other information Copies of test reports from other approval agencies Photographs of the instrument Lithium battery test reports from an OSHA Nationally Recognized Test Laboratory Verification of performance specifications for instruments (e.g., toxic gas detectors, oxygen deficiency meters) How do I apply for MSHA approval?Per ASAP2016 submit the following:

40. What happens after I submit my application? • MSHA reviews application to estimate maximum fee • Based on investigation time of similar previous applications • Does not include additional time for retesting or redesign • If the product cannot be inspected at the A&CC, you will be charged the travel expenses for the investigator to go and inspect the product at the remote site • Notification by mail • Fee estimate • Tentative start date • Return Fee Estimate Acceptance Form within 30 days

41. What happens after I submit my application? • Application assigned to an Investigator • Contacts person designated on application letter • Reviews application package • Prepares a discrepancy letter • Identifies components needed for test • Requests additional information or documentation necessary to continuing processing your application • Receive discrepancy letter in mail • Respond within time period specified in letter • Request extension of time if you can not provide all of the components or documentation within time period specified Reminder: You are responsible for all shipping arrangements and costs

42. What happens after I submit my application? • Investigator receives response to discrepancy letter • Inspects, evaluates and tests product for compliance with MSHA regulation, policies, and procedures • Prepares discrepancy letter documenting any test failures, non-compliance with requirements, and discrepancies between the product sample and documentation • If no discrepancies, Investigator prepares: • Advanced notice of approval (if requested) • Approval letter • Drawing list • Approval plate design Note: You must respond to each additional discrepancy letter within the time specified in the letter or your application will be cancelled!

43. What are my obligations after approval?As stated in your approval, certification or IS evaluation letter: • Build product according to approved drawing list • Labeling of product • No changes without prior MSHA authorization • Required changes in the interest of safety • MSHA right to rescind, for cause • Conditions of use NOTE: An intrinsic safety evaluation letter does not authorize you to advertise the product as permissible for use in underground gassy mines or as being approved or certified by MSHA

44. When must I apply for an extension of my approval, certification, or intrinsic safety evaluation? • Your product has been significantly redesigned; • The conditions of use have changed; or, • A significant number of critical components or assemblies have been changed that are not compatible with the currently approved model(s) It is your choice whether to apply for a new approval or an extension of approval

45. QUESTIONS ??? Concerning the application process