# Presentation: 143757

## Bud Page
Electrical Engineer
Electrical Safety Division

**Electrical Engineer**
**Electrical Safety Division**

**Notes:**
notes for slid 1

## MSHA Approval and Certification CenterOrganizational Chart

**MSHA Approval and Certification Center****Organizational Chart**

## Why do you need MSHA approval?

## 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_.

## 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,..._

## 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_;

## The Secretary’s Specifications are Codified in 30CFR

- 
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- 
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## 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

## 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.

## 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_

## Should I apply for...

- 

- 
- 

- 

- 

- 
- 

## 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

## 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

## 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

## 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%

## 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)

## 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

## Apply for an Intrinsic Safety Evaluation if 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.)

## 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_

## How do I apply for MSHA approval?Per ASAP2016 submit the following:

- Application Letter
- Documentation
- Drawing List
- Checklist
- Test samples
- Quality Assurance
- Other information

## How do I apply for MSHA approval?Per ASAP2016 submit the following:

- Application Letter
- Documentation
- Drawing List
- Checklist
- Test samples
- Quality Assurance
- Other information

## Slide 22

## Slide 23

## How do I apply for MSHA approval?Per ASAP2016 submit the following:

- 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

**Notes:**
SLIDE 28

Section 4.4 of the application procedure specifies the documentation necessary to evaluate your application.

An overall assembly drawing showing the physical construction of the apparatus and identifying the major components.

Schematic diagrams of each electrical circuit.

Electrical parts lists

Layout drawings showing the physical location of parts on printed circuit boards.

Printed circuit board artwork drawings, drawn to scale.

A block diagram showing the major components of the circuit.

A technical description of circuit operation.

A complete operator's manual on the use and maintenance of the unit.

## How do I apply for MSHA approval?Per ASAP2016 submit the following:

- 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:

- 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:

- 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

**Notes:**
Specifications for protective and power transformers include transformer type 1(a), 1(b), 2(a), 2(b) or Type 3 construction as specified in ACRI2001, Section 7.2; voltage and current ratings of each winding; high potential or dielectric strength specifications between windings; physical dimensions and spacing (clearances) of terminals and maximum temperature rating of insulation.

Current Limiting Resistors are to be specified by resistance value (nominal and tolerance), type of construction (single layer wirewound, metal oxide film or metal film), wattage, manufacturer, and manufacturer's part number.

Blocking capacitors by Type (ceramic or hermetically-sealed) capacitance (nominal and tolerance, or maximum value), nominal voltage rating, and maximum dielectric voltage.

Shunt protective components fitted to inductive elements shall be specified by type of component (such as diode, zener diode, rectifier), voltage and current ratings, wattage, and manufacturer and manufacturer's part number.

Opto-isolators by Manufacturer's name and part number, maximum voltage and current ratings, dielectric strength, and internal and external spacings (clearances) between input and output.

## How do I apply for MSHA approval?Per ASAP2016 submit the following:

- 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

**Notes:**
SLIDE 32

Batteries are to be specified by Type, voltage, capacity, and manufacturer's name and part number.

Capacitors by Type, capacitance (nominal and tolerance, or maximum value), and working voltage. 

Inductors by Manufacturer's name and part number; inductance (nominal and tolerance, (or better) a maximum value), and DC coil resistance (nominal and tolerance, or minimum value).

Motors by Manufacturer's name and part number, inductance (nominal and tolerance, or maximum value), dc resistance (nominal and tolerance, or minimum value).

Transformers windings specified by Manufacturer's name and part number, inductance (nominal and tolerance or maximum value) and dc resistance (nominal and tolerance or minimum value)

Piezoelectric Transducers and Devices by Manufacturer's name and part number and crystal capacitance.

## How do I apply for MSHA approval?Per ASAP2016 submit the following:

- 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

**Notes:**
SLIDE 33

Components containing hot filaments are to be specified by Manufacturer, manufacturer's type number, voltage, current and wattage rating.  If available, the maximum surface temperature rating.

 Low value resistors by resistance value (nominal and tolerance or minimum value) and wattage rating.

Solid State Voltage and Current Limiting Devices by Manufacturer's name and part number, input and output voltage (nominal and maximum) and current rating, and power dissipation rating.

## How do I apply for MSHA approval?Per ASAP2016 submit the following:

- 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

**Notes:**
SLIDE 34

Fuses and other thermal protection devices specified by Manufacturer's name and part number, current trip rating, maximum interrupt current, voltage rating and time vs. current characteristic curves.

Mechanical relays by Manufacturer's name and part number, coil inductance (nominal and tolerance, or maximum value), coil resistance (nominal and tolerance, or minimum value), and physical separation (clearances) between coil terminals and switching contacts or contact leads.

Heat Sinks by Manufacturer's name and part number or details of the physical dimensions and materials used.

All other non-critical components are to be specified by JEDEC number, generic number of integrated circuits, power rating, electrical values with tolerances, etc., whichever are applicable.

## How do I apply for MSHA approval?Per ASAP2016 submit the following:

- 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:

- Application Letter
- Documentation
- Drawing List
- Checklist
- Test samples
- Quality Assurance
- Other information

## Slide 33

## Slide 34

## How do I apply for MSHA approval?Per ASAP2016 submit the following:

- 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:

- 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:

- 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:

- Application Letter
- Documentation
- Drawing List
- Checklist
- Test samples
- Quality Assurance
- Other information

## How do I apply for MSHA approval?Per ASAP2016 submit the following:

- 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)

## 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

## 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

## 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!

## 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

## 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

## QUESTIONS ???

- Concerning the application process