Environmental Health and Safety 2021 Electrical Hazard Awareness

Environmental, Health and Safety 2021 Electrical Hazard Awareness www. avangrid. com Internal Use 1

Electrical Hazard Awareness Safety is not the absence of errors Safety is the presence of defenses www. avangrid. com Internal Use Electrical Hazard Awareness 2

Electrical Hazard Awareness Pre job planning Subjects to be covered The briefing shall cover at least the following subjects: • • • www. avangrid. com Hazards associated with the job Work procedures involved Special precautions Energy-source controls PPE requirements. At least one job briefing shall be conducted before the start of the first Internal Use job of each day or shift. 3

Electrical Hazard Awareness Advance notice needed for protective cover Contact Central Maine Power @ 1 -800 -565 -3181 3 Days for secondary conductors • Typical line to typical residential or small businesses 5 Days for primary conductors • Distribution system that feeds the secondaries www. avangrid. com This guard is for accidental contact only and is not be used for protection Internal Use of any kind. Minimum approach distance does not change. 4

Electrical Hazard Awareness Underground • Primary lines • May or may not be in conduit • Secondary lines • www. avangrid. com Internal Use May or may not be in conduit Electrical Hazard Awareness 5

Electrical Hazard Awareness Primary riser pole Secondary riser pole Primary voltages-one or two conduits Secondary voltages-stand off brackets or attached to pole www. avangrid. com Internal Use Electrical Hazard Awareness 6

Electrical Hazard Awareness: Accidental electrical contacts Crane tip over in Concord NH www. avangrid. com Tractor on flatbed trailer makes contact with conductor 2. 25. 21 in Poland Internal Use Electrical Hazard Awareness 7

Underground Padmount Transformers Underground transformers may be hidden from view What the inside of a typical padmount transformer looks like People tend to not like to look at underground Notice two primary wires www. avangrid. com Internal Use Electrical Hazard Awarenes 8

Call before you dig Underground cable can be anywhere Don’t let this happen to you Digging without locating underground utilities It can even happen with a shovel www. avangrid. com Electrical Hazard Awarenes Internal Use 9

Electrical Hazard Awareness Pre-mark www. avangrid. com Internal Use Electrical Hazard Awareness 10

Electrical Hazard Awareness Overhead Clearance www. avangrid. com Electrical Hazard Awareness Internal Use 11

Electric Hazard Awareness www. avangrid. com Internal Use 12

Electric Hazard Awareness www. avangrid. com Internal Use 13

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Electrical Hazard Awareness Step Potential www. avangrid. com Electrical Hazard Awareness Internal Use 15

Electrical Hazard Awareness Emergency Actions Should you have a contact call 911 Contact CMP 1 -800 -696 -1000 www. avangrid. com Electrical Hazard Awareness Internal Use 16

Electric Hazard Awareness Electric Safety Myths 1. 2. 3. 4. 5. 6. 7. “Tires are electrical insulators. ” "Power lines are insulated. ” “Only high voltage is dangerous. ” “When a wire falls to the ground, it automatically shuts off. ” “When a live wire falls, it makes sparks. ” “Wood is an insulator. ” “Household rubber gloves or rubber soled shoes insulate. ” www. avangrid. com Internal Use Electrical Hazard Awarenes 17

Electrical Hazard Awareness How to protect yourself • • Do not assume that a downed conductor is safe simply because it is on the ground or it is not sparking. Low-hanging wires still have voltage potential even if they are not touching the ground, so don’t touch them. Everything is energized until tested to be de-energized. Never go near a downed or fallen electric power line. Always assume that it is energized. Touching it could be fatal. Electricity can spread outward through the ground in a circular shape from the point of contact. As you move away from the center, large differences in voltages can be created. Never drive over downed power lines. Assume that they are energized. And, even if they are not, downed lines can become entangled in your equipment or vehicle. If contact is made with an energized power line while you are in a vehicle, remain calm and do not get out unless the vehicle is on fire. If possible, call for help. If you must exit any equipment because of fire or other safety reasons, try to jump completely clear, making sure that you do not touch the equipment and the ground at the same time. Land with both feet together and shuffle away in small steps to minimize the path of electric current and avoid electrical shock. Be careful to maintain your balance. www. avangrid. com Internal Use Bunny hop with feet and knees together. 18

Electrical Hazard Awareness Thank You for taking the time to learn from this training. If you have questions or need more information, contact George ‘Mike’ Shutts Environmental, Health & Safety Manager george. shutts@avangrid. com Wireless phone: 207 -530 -0204 www. avangrid. com Internal Use Bunny hop with feet and knees together. 19