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  MODULE 9: SAFE WORK PRACTICES


How Do You Work Safely?

A safe work environment is not enough to control all electrical hazards. You must also work safely. Safe work practices help you control your risk of injury or death from workplace hazards. If you are working on electrical circuits or with electrical tools and equipment, you need to use safe work practices.

Before you begin a task, ask yourself:

  • What could go wrong?

  • Do I have the knowledge, tools, and experience to do this work safely?

All workers should be very familiar with the safety procedures for their jobs. You must know how to use specific controls that help keep you safe. You must also use good judgment and common sense.

Control electrical hazards through safe work practices.

  • Plan your work and plan for safety.

  • Avoid wet working conditions and other dangers.

  • Avoid overhead powerlines.

  • Use proper wiring and connectors.

  • Use and maintain tools properly.

  • Wear correct PPE.

Plan Your Work and Plan for Safety

Take time to plan your work, by yourself and with others. Safety planning is an important part of any task. It takes effort to recognize, evaluate, and control hazards. If you are thinking about your work tasks or about what others think of you, it is hard to take the time to plan for safety. But, YOU MUST PLAN.

Planning with others is especially helpful. It allows you to coordinate your work and take advantage of what others know about identifying and controlling hazards. The following is a list of some things to think about as you plan.

  • Work with a buddy;-Do not work alone. Both of you should be trained in CPR. Both of you must know what to do in an emergency.

  • Know how to shut off and de-energize circuits-You must find where circuit breakers, fuses, and switches are located. Then, the circuits that you will be working on (even low-voltage circuits) MUST BE TURNED OFF! Test the circuits before beginning work to make sure they are completely de-energized.
    • This worker is applying a group lock out device. The equipment cannot be re started until all workers remove their locks.
  • Plan to lock out and tag out circuits and equipment - Make certain all energy sources are locked out and tagged out before performing any work on an electrical circuit or electrical device. Working on energized ("hot") circuits is one of the most dangerous things any worker could do. If someone turns on a circuit without warning, you can be shocked, burned, or electrocuted. The unexpected starting of electrical equipment can cause severe injury or death.

    Before ANY work is done on a circuit, shut off the circuit, lock out and tag out the circuit at the distribution panel, then test the circuit to make sure it is de-energized.

    Before ANY equipment inspections or repairs-even on so-called low-voltage circuits-the current must be turned off at the switch box, and the switch must be padlocked in the OFF position. At the same time, the equipment must be securely tagged to warn everyone that work is being performed. Again, test circuits and equipment to ensure they are de-energized.

    No two locks should be alike. Each key should fit only one lock, and only one key should be issued to each worker. If more than one worker is working on a circuit or repairing a piece of equipment, each worker should lock out the switch with his or her own lock and never permit anyone else to remove it. At all times, you must be certain that you are not exposing other workers to danger. Workers who perform lock-out/tag-out must be trained and authorized to repair and maintain electrical equipment. A locked-out switch or feeder panel prevents others from turning on a circuit. The tag informs other workers of your action.

  • Remove jewelry and metal objects - Remove jewelry and other metal objects or apparel from your body before beginning work. These things can cause burns if worn near high currents and can get caught as you work.

  • Plan to avoid falls - Injuries can result from falling off scaffolding or ladders. Other workers may also be injured from equipment and debris falling from scaffolding and ladders.


  • Do not do any tasks that you are not trained to do or that you do not feel comfortable doing!

Avoid Wet Working Conditions and Other Dangers

Remember that any hazard becomes much more dangerous in damp or wet conditions. To be on the safe side, assume there is dampness in any work location, even if you do not see water. Even sweat can create a damp condition!

  • Do not work wet - Do not work on circuits or use electrical equipment in damp or wet areas. If necessary, clear the area of loose material or hanging objects. Cover wet floors with wooden planking that can be kept dry. Wear insulating rubber boots or shoes. Your hands must be dry when plugging and unplugging power cords and extension cords. Do not get cleaning solutions on energized equipment.

  • Use a GFCI - Always use a GFCI when using portable tools and extension cords.

Avoid Overhead Powerlines

Be very careful not to contact overhead powerlines or other exposed wires. More than half of all electrocutions are caused by contact with overhead lines. When working in an elevated position near overhead lines, avoid locations where you (and any conductive object you hold) could contact an unguarded or uninsulated line. You should be at least 10 feet (3.05 meters) away from high-voltage transmission lines.

Vehicle operators should also pay attention to overhead wiring. Dump trucks, front-end loaders, and cranes can lift and make contact with overhead lines. If you contact equipment that is touching live wires, you will be shocked and may be killed. If you are in the vehicle, stay inside. Always be aware of what is going on around you.

Use Proper Wiring and Connectors

  • Avoid overloads - Do not overload circuits.

  • Test GFCI's - Test GFCI's monthly using the "test" button.

  • Check switches and insulation - Tools and other equipment must operate properly. Make
    sure that switches and insulating parts are in good condition.

  • Use three-prong plugs - Never use a three-prong grounding plug with the third prong broken-off. When using tools that require a third-wire ground, use only three-wire extension cords with three-prong grounding plugs and three-hole electrical out-lets. Never remove the grounding prong from a plug! You could be shocked or expose someone else to a hazard. If you see a cord without a grounding prong in the plug, remove the cord from service immediately.

  • Use extension cords properly - If an extension cord must be used, choose one with sufficient ampacity for the tool being used. An undersized cord can overheat and cause a drop in voltage and tool power. Check the tool manufacturer's recommendations for the required wire gauge and cord length. Make sure the insulation is intact. To reduce the risk of damage to a cord's insulation, use cords with insulation marked "S" (hard service) rather than cords marked "SJ" (junior hard service). Make sure the grounding prong is intact. In damp locations, make sure wires and connectors are waterproof and approved for such locations. Do not create a tripping hazard.
 Portable GFCI

  • Check power cords and extensions - Electrical cords should be inspected regularly using the following procedure:

    1. Remove the cord from the electrical power source before inspecting.

    2. Make sure the grounding prong is present in the plug.

    3. Make sure the plug and receptacle are not damaged.

    4. Wipe the cord clean with a diluted detergent and examine for cuts, breaks, abrasions, and defects in the insulation.

    5. Coil or hang the cord for storage. Do not use any other methods. Coiling or hanging is the best way to avoid tight kinks, cuts, and scrapes that can damage insulation or conductors.

    You should also test electrical cords regularly for ground continuity using a continuity tester as follows:

    1. Connect one lead of the tester to the ground prong at one end of the cord.

    2. Connect the second lead to the ground wire hole at the other end of the cord.

    3. If the tester lights up or beeps (depending on design), the cord's ground wire is okay. If not, the cord is damaged and should not be used.

  • Do not pull on cords - Always disconnect a cord by the plug.

  • Locking type attachment plug Use correct connectors - Use electrical plugs and receptacles that are right for your current and voltage needs. Connectors are designed for specific currents and voltages so that only matching plugs and receptacles will fit together. This safeguard prevents a piece of equipment, a cord, and a power source with different voltage and current requirements from being plugged together. Standard configurations for plugs and receptacles have been established by the National Electric Manufacturers Association (NEMA).

Use and Maintain Hand and Power Tools Properly Hand and power tools are a common part of our everyday lives and are present in nearly every industry. These tools help us to easily perform tasks that otherwise would be difficult or impossible. However, these simple tools can be hazardous and have the potential for causing severe injuries when used or maintained improperly. Special attention toward hand and power tool safety is necessary in order to reduce or eliminate these hazards.

Your tools are at the heart of your craft. Tools help you do your job with a high degree of quality. Tools can do something else, too. They can cause injury or even death! You must use the right tools for the job. Proper maintenance of tools and other equipment is very important. Inadequate maintenance can cause equipment to deteriorate-rate, creating dangerous conditions. You must take care of your tools so they can help you and not hurt you.

  • Inspect tools before using them - Check for cracked casings, dents, missing or broken parts, and contamination (oil, moisture, dirt, corrosion). Damaged tools must be removed from service and properly tagged. These tools should not be used until they are repaired and tested.

  • Use the right tool correctly - Use tools correctly and for their intended purposes. Follow the safety instructions and operating procedures recommended by the manufacturer. When working on a circuit, use approved tools with insulated handles.

    Note: DO NOT USE THESE TOOLS TO WORK ON ENERGIZED CIRCUITS. ALWAYS SHUT OFF AND DE-ENERGIZE CIRCUITS BEFORE BEGINNING WORK ON THEM.

  • Protect your tools - Keep tools and cords away from heat, oil, and sharp objects. These hazards can damage insulation. If a tool or cord heats up, stop using it! Report the condition to a supervisor or instructor immediately. If equipment has been repaired, make sure that it has been tested and certified as safe before using it. Never carry a tool by the cord. Disconnect cords by pulling the plug-not the cord!

  • Use double-insulated tools - Portable electrical tools are classified by the number of insulation barriers between the electrical conductors in the tool and the worker. The NEC permits the use of portable tools only if they have been approved by Underwriter's Laboratories (UL Listed). Equipment that has two insulation barriers and no exposed metal parts is called double-insulated. When used properly, double-insulated tools provide reliable shock protection without the need for a third ground wire. Power tools with metal housings or only one layer of effective insulation must have a third ground wire and three-prong plug.

  • Use multiple safe practices - Remember: A circuit may not be wired correctly. Wires may contact other "hot" circuits. Someone else may do something to place you in danger. Take all possible precautions.
Read more about and power tool safety

this cord has been spliced using a wire nut. Spliced cords are very dangerous!ed

Don't work on energized circuits . Always follow correct lock-out tag out procedures

hard hat, safety glasses, gloves Wear Correct PPE

OSHA requires that you be provided with personal protective equipment. This equipment must meet OSHA requirements and be appropriate for the parts of the body that need protection and the work performed. There are many types of PPE: rubber gloves, insulating shoes and boots, face shields, safety glasses, hard hats, etc. Even if laws did not exist requiring the use of PPE, there would still be every reason to use this equipment. PPE helps keep you safe. It is the last line of defense between you and the hazard.

  • Wear safety glasses - Wear safety glasses to avoid eye injury.

  • Wear proper clothing - Wear clothing that is neither floppy nor too tight. Loose clothing will catch on corners and rough surfaces. Clothing that binds is uncomfortable and distracting.

  • Contain and secure loose hair - Wear your hair in such a way that it does not interfere with your work or safety.

  • Wear proper foot protection - Wear shoes or boots that have been approved for electrical work. (Tennis shoes will not protect you from electrical hazards.) If there are non-electrical hazards present (nails on the floor, heavy objects, etc.), use footwear that is approved to protect against these hazards as well.

  • Wear a hard hat - Wear the proper class of hard hat to protect your head from bumps, falling objects and electrical hazards. Hard hats should be worn with the bill forward to protect you properly.

  • Wear hearing protectors - Wear hearing protectors in noisy areas to prevent hearing loss.

  • Follow directions - Follow the manufacturer's directions for cleaning and maintaining PPE.

  • Make an effort - Search out and use any and all equipment that will protect you from shocks and other injuries.
Wear safety glasses to avoid eye injury


Arcing electrical burns through the victim's sho3e and around the rubber sole

video
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Take the review Quiz Most (but not all) questions on the final exam are derived from module quizzes.

This material is for training purposes only to inform the reader of occupational safety and health best practices and general compliance requirements and is not a substitute for provisions of the OSH Act of 1970 or any governmental regulatory agency. Copyright © 2000-2008 Geigle Communications, LLC. All rights reserved. Federal copyright law prohibits unauthorized reproduction by any means and imposes fines up to $25,000 for violations. Students may reproduce materials for personal study.