# Presentation: 142719

## "Underground 

- "Underground
- Electrical
-  Safety"

## The two types of electricity used in mining are: 

**The two types of electricity used in mining are:**** **

**“****AC” or alternating current and**
** “****DC” or direct current                                           **

## Why must caution be used when operating or repairing electrical equipment?

**Why must caution be used when operating or repairing electrical equipment?**

**Failure to exercise caution may result in injury.**

## When performing electrical work, always use the proper protective equipment, such as:

**When performing electrical work, always use the proper protective equipment, such as:**

**  ****safety glasses, protective gloves, and a properly rated meter.**

## What types of accidents can occur while working around electricity?

**What types of accidents can occur while working around electricity?**

**Electrical shock, electrical burns, and flash burns.**

## Electricity can be an ignition source for mine fires and explosions.

**Electricity can be an ignition source for mine fires and explosions.**

**What are some of the other hazards that can result from electricity?**

##  Arcs can: - generate heat and cause fires 		- cause burns or eye damage 			- reach temperatures of 10,000 degrees

** ****Arcs can:**** - generate heat and cause fires ****	****	****- cause burns or eye damage ****	****	****	****- reach temperatures of 10,000 degrees**

**What dangers are posed by electrical arcs?**

## Do any regulations exist regarding electrical hazards?

**Do any regulations exist regarding electrical hazards?**

**State and Federal regulations, as well as company policies, have been designed to guard against electrical hazards in the mining industry.**

## All miners are exposed to electricity.

**All miners are exposed to electricity.**
** ****Do not take electricity for granted.   **

**Who is exposed to the hazards of electricity?  **

## What dangerous conditions can occur as a result of poor roof conditions?

**What dangerous conditions can occur as a result of poor roof conditions?**

**Falling rock may damage an electrical cable or component.**

## What hazards can wet conditions   contribute to?

**Wet conditions may corrode metal electrical components and cause their failure.**

**What hazards can wet conditions   contribute to?**

## Why must you exercise caution and use proper protective equipment when working with batteries?

**Why must you exercise caution and use proper protective equipment when working with batteries?**

**  ****Batteries could explode and cause injury or could ignite and cause fires**

## Be alert and knowledgeable of the hazards of electricity.

**Be alert and knowledgeable of the hazards of electricity.**

**Never touch any electrical component until you are sure it is deenergized.**

## Slide 14

## What amounts of voltage should be considered dangerous?  

- What amounts of voltage should be considered dangerous?

- All amounts.  The most common source of electrical shock is 110 volts.

## What should you do if you find a potentially dangerous condition?

**What should you do if you find a potentially dangerous condition?**

**Remove it from service immediately and report it to the appropriate person.  **

## Why must you use caution when working in low lighting? 

**Why must you use caution when working in low lighting? **

**Hazards are much harder to see.**

## No electrical work can be performed until:

**No electrical work can be performed until:**

**the electrical circuit is knocked, locked, and tagged.**

## Always make certain the frame ground is properly connected.

**Always make certain the frame ground is properly connected.**

## Metal components that can be energized by the failure of insulation, or by contact with energized parts, shall be grounded by approved methods.

**Metal components that can be energized by the failure of insulation, or by contact with energized parts, shall be grounded by approved methods.**

## No electrical work shall be performed except by a qualified person.

**No electrical work shall be performed except by a qualified person.**

**Circuit breakers and disconnects shall be marked for identification.**

**Circuit breaking devices or proper fuses, shall be installed to protect against short circuit and overloads.**

## All power circuits and electrical equipment shall be deenergized before work is performed, except for troubleshooting or testing.

**All power circuits and electrical equipment shall be deenergized before work is performed, except for troubleshooting or testing.**

**When a potentially dangerous condition is found on electric equipment, it shall be removed from service until it is repaired.**

## Disconnecting devices shall be locked and tagged out.

**Disconnecting devices shall be locked and tagged out.**

**All electrical equipment shall be examined, tested, properly maintained, and results recorded as required.**

## Produced by American Electric Power in cooperation with the Mine Safety and Health Administration (MSHA)

**Produced by American Electric Power in cooperation with the Mine Safety and Health Administration (MSHA)**
***Special Thanks To:***
**	****Donna Bowen  ****	****	****	****Timothy Martin**
**	****David Grubb ****	****	****	**** William Mathews**
** ****	****Bruce Hann****	****	****	**** Randal Riddle**
**	****Robert Klatt****	****	****	**** Lance Sogan**
**	****Raymond Lieving ****	****	**** Charles Wood**
**Employees at Southern Ohio Coal Co. and      Windsor Coal Co.**

## Technical Advisors:                           Paul Fernatt                                         Robert Teichman 

***Technical Advisors:******                           *****Paul Fernatt                                         Robert Teichman **
***MSHA Advisor:******                        *****Ronald Sidwell**
***UMWA  - Local 1886 Advisors:****** *****Paul Walker                                   Clarence Williams**
***Narration:******                                      *****Randy Callihan**