Electrical Safety How Electricity Works Example A Garden

Electrical Safety

How Electricity Works Example: A Garden Hose ater Flow of W To Low Pressure Water Moves from High Pressure The same thing occurs in an Electrical Wire Flow of Current Moves from High Voltage To Low Voltage

Primary Hazards of Electricity Electrical shocks • Burns • Explosions • Fires • Falls • on m m co t s ! o d m r a e z h T ha l a c i r elect

Do Not Let This Happens to You

Personal Protective Equipment This person used to have a watch before electrical contact!

High Voltage Shock & Arc Cable blown away when wire cutters make contact with conductor

High Voltage Shock Effects n Insulated cutters, but inappropriate tool to use for high voltage. n Only High Voltage Hot sticks, with Voltage-rated Gloves can be used for this work. n Qualified Electrical Workers only. n Result: Electrocution.

High Voltage Shock Physical Effects of Electrocution

High Voltage Shock Entry point of High Voltage

High Voltage Shock Blowout Effects n Exit points (4) n Thru the right thumb, left elbow, abdomen, and pelvic area; where High Voltage Arc blows out… completing the circuit to ground.

High Voltage Shock Entry and Exit Wounds

Caused by 24 volt DC battery Notice where watch band & screwdriver were in contact with skin Caused by kneeling on a defective 110 volt ac extension cord Notice the path in & the path out

Protection

Arc Flash PPE Categories Category 3 n Untreated Cotton T-Shirt n Untreated Cotton Shirt (Long n n n n n Sleeve) FR Shirt (Long Sleeve) Untreated Cotton Pants (Long) FR Pants (Long) Voltage Rated Gloves Safety Glasses FR Hard Hat Liner Hard Hat Double Layer Bee Keepers Hood Hearing Protection

Arc Flash PPE Categories Category 4 n Untreated Cotton T-Shirt n Untreated Cotton Shirt (Long n n n n n Sleeve) FR Shirt (Long Sleeve) Untreated Cotton Pants (Long) FR Coveralls Voltage Rated Gloves Safety Glasses FR Hard Hat Liner Hard Hat Double Layer Bee Keepers Hood Hearing Protection

Falls n Electric shock can also cause indirect or secondary injuries n Workers in elevated locations who experience a shock can fall, resulting in serious injury or death

Overloaded Circuit Another common way in which power cords can be overloaded is by plugging one power strip into another. All of the current drawn by any device plugged into any of the strips must flow through a single cord

Insulating the Conductors The first way to safeguard workers from electrically energized wires is through insulation

Ground Fault Circuit Interrupter (GFCI)

GFCIs need monthly test!

3) Guarding the Conductors • The third way to protect workers from electrically energized wires is by guarding them • It is always necessary to check that electrical boxes and panels are covered and free from missing “knock -outs”.

Guarding

4 - Grounding

Preventing Electrical Hazards - PPE Proper foot protection (not tennis shoes) n Rubber insulating gloves, hoods, sleeves, matting, and blankets n Hard hat (insulated nonconductive) n

Lock-Out & Tag. Out Procedure

12/13/2021 66

Rubber Insulating Matting

Safety Precaution