Why Electrical Training? What Problems Do You See in Your work area? - Damaged plug
- Missing ground pin
- Shorted out – the missing prong was found still in the outlet...
- Why is a missing ground pin a problem?
What Problems Do You See in Your work area? - Damaged GFCI outlet
- Why didn’t the GFCI prevent the damage?
What Problems Do You See in Your work area? - Spliced and taped cord on a lamp – fire and electrocution hazard
Don’t do this at home..... Home Electrical Safety - Do not connect more than 3 light sets together & do not overload extension cords (use an outlet strip with built-in overload protection).
- Turn off all Christmas lights prior to leaving your
- home or going to bed.
- Test your smoke and carbon monoxide detectors, replace batteries.
- Plug lights & decorations into circuits protected by GFCIs (ground fault circuit interrupters).
Why Follow the Rules? - Electrical shock
- What is the highest voltage on production equipment here at BD – Sandy?
- When was the last electrical shock incident (other than static electricity) at BD – Sandy?
- Arc Flash hazard
- Electrical fires
- Electrical burns
ELECTRICAL HAZARDS - Misnomer: Electricity flows through the path of least resistance. (It flows through ALL paths…)
- Electric shock occurs when the human body becomes part of the path through which electrical current flows.
- The direct result can be electrocution.
- Burns can result when a person touches electrical wiring or equipment that is energized
- The indirect result can be injury resulting from a fall or movement into machinery because of a shock.
Arc Flash/ Arc Blast - Occurs when high amperage current jumps a gap (short circuit) – such as when un-insulated tools are being used on live electrical circuits...
- Arc Flash / Arc Blast injuries was the number one source of electrical injuries, and has been for many years…
- An arc blast can occur when electrical cabinets/panels are open
- Temperatures can be as high as 35,000 F
- Metal, Molten metal, or other objects
- Pressure Wave
ELECTRICAL HAZARDS - Explosions: Occur when electricity provides an ignition source for an explosive mixture in the air.
- Fires: Electricity is the most common cause of fires both in the home and in the workplace.
- Defective or misused electrical equipment is a major cause.
- Electrically Classified Areas and Equipment: Never substitute parts, never make modifications without an Engineering Review!
ELECTRIC SHOCK - Effects of electric shock
- depend on:
- -- Current & voltage
- -- Resistance
- -- Path through body
- -- Duration of shock
CURRENT & VOLTAGE - As alternating current increases:
- Tingling gives way to muscle contractions
- Pain develops
- Control of muscles becomes increasingly difficult
- At 15 mA, victims cannot let go of the conductive surface
- At 70 mA, ventricular fibrillation of the heart occurs (a typical circuit is 15 amps plus)
- Death follows in a few minutes
- Heavy current flow can also result in severe burns (internal & external) & heart paralysis
- Extension cords can be made ONLY by “Qualified Individuals” (see above…)
- Do not use gang plugs (wall mount box on end of extension cord with 2 or more outlets installed…)
- Do not use cords with broken ground prongs
- Do not piggy-back surge protectors
- Do not use zip cords (light weight household type extension cords that do not have a secondary insulation sheath)
General Electrical Concerns - Keep all electrical equipment clear from water and moisture
- Building Circuit Breakers can be reset ONLY by Qualified Facilities Personnel
- The only persons authorized to open and do any work in an electrical cabinet on production equipment are:
- Qualified Electro-mechanics
- Qualified Engineers
Don’t do this at Home.... THANK YOU!
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