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Electrical Training #2

* Safety Training Outline *

Outline - Electrical Safety Training Outline

1. Define an energized exposed electrical part.

Content:

a. Define exposed part.

b. Define live or energized part.

c. Define de-energized exposed part.

d. Discuss exposed parts that have been de-energized but are not locked/tagged out are considered energized exposed parts.

Notes:

Exercises:




2. Explain procedures for working on or near exposed electrical parts.

Content:

a. Inform employees that they are not able to work on or near exposed electrical parts without the parts being de-energized and locked/tagged out.

b. Explain that lockout/tagout must be done by a qualified person.

c. Define a qualified person.

Notes:

Exercises:




3. Inform the workers of clearance distances when working below unguarded, energized overhead lines.

Content:

This distance is the distance between the workers or the longest conductive object they may contact and the overhead lines.

a. For elevated surfaces and voltages of 50 kv or less to ground, the distance is 10 feet.

b. For elevated surfaces and voltages greater than 50 kv to ground, the distance is 10 feet plus 4 inches for every 10 kv greater than 50 kv.*

c. When working on the ground in the vicinity of unguarded, energized overhead lines, the person may not bring any conductive object closer than 10 feet for voltage 50 kv or less to ground.

d. When working on the ground in the vicinity of unguarded, energized overhead lines, the person may not bring any conductive object closer than 10 feet plus 4 inches for every 10 kv over 50 kv for voltage greater than 50 kv to ground.*

Notes: *For example, the voltage to ground is 80 kv. Subtract 50 kv from 80 kv which is 30 kv. Now divide the 30 kv by 10 kv which is 3. As result, the distance would be 10 feet plus 4 inches times 3 or 10 feet plus 12 inches or 11 feet.

Exercises:




4. Discuss the clearance distance between energized overhead lines and vehicles/mechanical equipment which can have its parts elevated near these lines.


Content:

a. For voltages 50 kv or less, the clearance distance is 10 feet.

b. For voltages greater than 50 kv, the clearance is 10 feet plus 4 inches for every 10 kv over 50 kv.

c. When the vehicle is in transit and the structure is lowered, the clearance distance is 4 feet for 50 kv or less, or 4 feet plus 4 inches for every 10 kv over 50 kv for voltage greater than 50 kv.

d. When insulating barriers designed for the line voltage are installed and not attached to or a part of the vehicle or mechanical equipment, the clearance distance is the designed working dimensions of the barrier. 

e. Inform employees that they must not come in contact with any vehicle or mechanical equipment or its parts which is under energized overhead lines, unless:

- Employee is wearing the proper PPE; or

- Equipment/vehicle is locate so that no uninsulated part can provide a conductive path to employees.

 f. Explain that employees may not stand near the grounding location for intentionally grounded equipment or vehicles when contact with overhead wires is possible.

-Discuss the use of insulation and barriers to protect employees from the grounding area.

Notes:

Exercises:




5. Discuss the use of nonconductive ladders when working near or on electrical parts.


Content:

Portable ladders must have nonconductive siderails when they will be used where the employee or the ladder could contact exposed energized parts. Metal ladders can conduct electricity and can cause dangerous arcing and shocks.

Notes:

Exercises:




6. Explain the hazards of wearing conductive apparel such as jewelry, metalized aprons, metal headgear, and cloth with conductive threads.


Content:

Conductive jewelry and clothing can cause dangerous arcing if it comes into contact with exposed energized parts. If these items are not removed, they must be covered so that they are no longer conductive.

Notes:

Exercises:




7. State the procedures for using portable electrical equipment.


Content:

a. Discuss the proper handling of cords:

- No raising or lowing of equipment by its cord,

- No unplugging the equipment by pulling on the cord, or

- No stapling or fastening the cord so the outer jacket or insulation could be damaged.

 b. Explain the inspection of portable cord- and plug-connected equipment and flexible cord sets.

- Check visually for external defectives such as loose parts, deformed and missing pins, damaged jacket or insulation.

- Inspect for internal defectives such as pinched or crushed outer jacket.

- Conduct inspections before use on every shift. Cord- and plug-connected equipment and flexible cord sets which remain connected and are not exposed to damage do not need to visually inspected until they are relocated.

- Remove from service any defective equipment and do not use it until repairs have been made.

- Check the plug and receptacle mating configuration before connection to ensure proper mating.

            c. Inform employees that flexible cords used with grounding-type of equipment must have an equipment grounding conductor.

- Explain the proper way to use flexible cords with the equipment grounding connector; no connecting or altering of these devices to allow the grounding pole to be inserted into slots intended for current carrying conductors.

- Discuss the use of adaptors with equipment grounding connections. Explain that adaptors with the ground pin missing or where the adaptor is not connected properly cannot be used.

d. Discuss the types of portable electrical equipment and flexible cords to be used in areas where contact with water and conductive liquids is possible.

e. Inform workers of the proper methods for plugging and unplugging cord- and plug-connected equipment and flexible cords:

- Make sure hands are dry;

- Do not pull plug out by the cord;

- Handle them with insulating protective equipment when the cord connector is wet; and

- Secure locking-type connectors after connections.

 f. Discuss the use of circuit breakers and similar devices for opening and closing electric power and lighting circuits.

 g. Explain that fuses, terminal lugs, cable connectors, and cable splice connections may not be use for the opening and closing of electric power and lighting circuits.

 h. Inform workers that a circuit can not be manually reenergized after the circuit protective device deenergized the circuit without first determining if the equipment and circuit can be safely energized. The repeated closing of circuit breakers and replacement of fuses is not allowed.

i. Discuss the use of flammable and combustible materials around electrical equipment. Include information to control hazards of electrical equipment which could ignite flammable materials.

Notes:

Exercises:




8. Describe the protective equipment.


Content:

a. Discuss the protective equipment to be used if using portable electric tools or electric equipment are operated in a damp or wet environment.

b. Inform workers that protective equipment must be inspected or tested to ensure its reliability.

c. Explain that normally enclosed live parts must be guarded during maintenance.

Notes:

Exercises: PPE demonstration




9. Describe the alerting techniques.


Content:

a. Explain and show the workers the type of signs and markings they will encounter while working on or near electrical equipment.

b. Discuss the use of barricades to prevent or limit entry into an area of exposed energized parts. Include that barricades must be nonconductive.

c. Discuss the use of attendants when barricades and signs do not provide sufficient warning.

Notes:

Exercises:




10. Summarize key points.


Content:

Definitions of energized, exposed, de-energized, and qualified worker,

 - De-energized means locked/tagged out,

 - Safe distances for clearance between a worker and energized overhead lines,

 - Nonconductive ladders,

 - Nonconductive clothing,

 - Proper use of cords, plugs, and receptacles,

 - Proper use of electrical equipment around flammable and combustible materials,

 - Protective equipment, and

 - Alerting techniques.

Notes:

Exercises:



* Keep Safety "Hot" *

We welcome comments about this article, and your requests for future topics.

    If you have a specific topic you would like to see covered here or that you may need for your company, please send an Email to our Tail Gate Safety Topics editor, Dave Miller at demiller@pacificemployers.com or to peinfo@pacificemployers.com. Thanks!

 

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Copyright © 2001 by David E. Miller

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