You will learn about…You will learn about…

– Hazards of ElectricityHazards of Electricity– Isolating CircuitsIsolating Circuits– Testing CircuitsTesting Circuits– Work on Energized EquipmentWork on Energized Equipment– Portable Electrical ToolsPortable Electrical Tools– Electrical PPEElectrical PPE– Work Area SafetyWork Area Safety– Electrical SystemsElectrical Systems

Electrical SafetyElectrical Safety

Special Training is required Special Training is required for work on electrical for work on electrical equipmentequipment

Only Authorized Employees Only Authorized Employees may conduct electrical workmay conduct electrical work

Special TrainingSpecial Training

Training for Authorized Employees Training for Authorized Employees covers:covers:

– Safe Work PracticesSafe Work Practices

– Isolation of Electrical SourcesIsolation of Electrical Sources

– Test EquipmentTest Equipment

– Tools & PPETools & PPE

HazardsHazards

Electrical Hazards IncludeElectrical Hazards Include

– Electrical ShockElectrical Shock

– Electrical ExplosionsElectrical Explosions

– Electrical BurnsElectrical Burns These can result in severe injury or deathThese can result in severe injury or death

Safe Work PracticesSafe Work Practices

Before starting work…Before starting work…

– De-energize, Lock, Tag & Test De-energize, Lock, Tag & Test all circuits of 50 volts or lessall circuits of 50 volts or less

– Deenergize all Power Sources Deenergize all Power Sources

– Disconnect from all electric Disconnect from all electric energy sourcesenergy sources

Control DevicesControl Devices

Control circuit devices such as…Control circuit devices such as…

–push buttons push buttons

–selector switches selector switches

–interlocksinterlocks

……may not be used as the sole means may not be used as the sole means for de-energizing circuits or for de-energizing circuits or equipment.equipment.

Lock & Tag…Lock & Tag…

Lock & Tag all Sources Lock & Tag all Sources

– Place Lock & Tag on each disconnecting Place Lock & Tag on each disconnecting means used to de-energize circuits means used to de-energize circuits

– Attach Lock so as to prevent operating Attach Lock so as to prevent operating the disconnecting means the disconnecting means

– Place Tag with Each Lock Place Tag with Each Lock

If a Lock cannot be If a Lock cannot be applied…applied… A tag used without a lock must be A tag used without a lock must be

supplemented by at least one additional supplemented by at least one additional safety measure that provides a level of safety safety measure that provides a level of safety equal to that of a lock. equal to that of a lock.

Examples:Examples:– Removal of an isolating circuit element Removal of an isolating circuit element

such as a fusesuch as a fuse– Blocking of a controlling switch Blocking of a controlling switch – Opening of an extra disconnecting device. Opening of an extra disconnecting device.

Release Stored Energy…Release Stored Energy…

Stored electric energy must be released Stored electric energy must be released before starting work.before starting work.

– Discharge all CapacitorsDischarge all Capacitors

– Short-Circuit & Ground all high Short-Circuit & Ground all high capacitance elements capacitance elements

Is it “Dead”?…Is it “Dead”?… Verify System is De-Verify System is De-

energizedenergized – Operate the equipment Operate the equipment controls to check that controls to check that equipment cannot beequipment cannot be restarted.restarted.

– Use test equipment to test the circuits & Use test equipment to test the circuits & electrical parts for voltage & currentelectrical parts for voltage & current

Check your tester…Check your tester…

Check test equipment (Volt-Check test equipment (Volt-Ohlm Meter) on a known live Ohlm Meter) on a known live source of same rating to ensure source of same rating to ensure it works it works before before and and afterafter checking the circuit on which checking the circuit on which you will be workingyou will be working

Re-energizing Re-energizing Equipment…Equipment…– Conduct tests and visual inspections to Conduct tests and visual inspections to

ensure all tools, electrical jumpers, ensure all tools, electrical jumpers, shorts, grounds, and other such devices shorts, grounds, and other such devices have been removed have been removed

– Warn others to stay clear of circuits and Warn others to stay clear of circuits and equipment. equipment.

– Each lock and tag must be removed by Each lock and tag must be removed by the person who applied it the person who applied it

– Visually check that all employees are Visually check that all employees are clear of the circuits and equipment. clear of the circuits and equipment.

Energized….Energized….

Working with Energized PartsWorking with Energized Parts

Persons working on energized equipment Persons working on energized equipment must be familiar with the proper use of must be familiar with the proper use of special precautionary techniques, special precautionary techniques, personal protective equipment, insulating personal protective equipment, insulating and shielding materials, and insulated and shielding materials, and insulated tools. tools.

Working on energized Working on energized circuitscircuits When working on energized circuitsWhen working on energized circuits

– Isolate the area from all traffic Isolate the area from all traffic – Post signs & barricades Post signs & barricades – Use an attendant if necessary Use an attendant if necessary – Use insulated tool, mats and sheeting Use insulated tool, mats and sheeting – Use electrical rubber sheeting to cover nearby Use electrical rubber sheeting to cover nearby

exposed circuits exposed circuits

Conductive MaterialsConductive Materials

Conductive materials and Conductive materials and equipment must be handled so equipment must be handled so as to prevent them from as to prevent them from contacting exposed energized contacting exposed energized conductors or circuit partsconductors or circuit parts

Conductive ApparelConductive Apparel

Remove all conductive articles of Remove all conductive articles of jewelry and clothing, such a watch jewelry and clothing, such a watch bands, bracelets, rings, key chains, bands, bracelets, rings, key chains, necklaces, metalized aprons, cloth necklaces, metalized aprons, cloth with conductive thread, or metal with conductive thread, or metal headgear. headgear.

Portable Electric Tools & Portable Electric Tools & CordsCords Portable equipment must be handled in a Portable equipment must be handled in a

manner which will not cause damage.manner which will not cause damage. Flexible electric cords connected to Flexible electric cords connected to

equipment may not be used for raising or equipment may not be used for raising or lowering the equipment.lowering the equipment.

Flexible cords may not be fastened with Flexible cords may not be fastened with staples or otherwise hung in such a fashion staples or otherwise hung in such a fashion as could damage the outer jacket or as could damage the outer jacket or insulation. insulation.

Visually Inspect…Visually Inspect… Portable cord and plug connected Portable cord and plug connected

equipment and flexible cord sets equipment and flexible cord sets (extension cords) shall be visually (extension cords) shall be visually inspected before use on any shift for inspected before use on any shift for external defects:external defects:– Loose parts Loose parts – Deformed or missing pins Deformed or missing pins – Damage to outer jacket or insulation Damage to outer jacket or insulation – Evidence of possible internal damageEvidence of possible internal damage

Remove from Service…Remove from Service…

If there is a defect or evidence of If there is a defect or evidence of damage to any electrical tools or damage to any electrical tools or equipment…equipment…

Immediately notify your supervisorImmediately notify your supervisor

Remove the item from serviceRemove the item from service

Tell your co-workersTell your co-workers

Water HazardWater Hazard

Ensure hand, cords and Ensure hand, cords and receptacles are dry when receptacles are dry when plugging and unplugging plugging and unplugging power cordspower cords

Ladders….Ladders….

– Portable ladders must have non-Portable ladders must have non-conductive side rails if they are used conductive side rails if they are used where a workers or the ladder could where a workers or the ladder could contact exposed energized parts. contact exposed energized parts.

– Keep all ladder parts at least 10 feet Keep all ladder parts at least 10 feet away from overhead power linesaway from overhead power lines

Test Instruments..Test Instruments..

– Test instruments, equipment & test Test instruments, equipment & test leads, cables, power cords, probes, and leads, cables, power cords, probes, and connectors must be visually inspected connectors must be visually inspected for external defects and damage before for external defects and damage before the equipment is used.the equipment is used.

– Remove any defective items from Remove any defective items from serviceservice

Instrument Ratings…Instrument Ratings…

Test instruments and equipment & Test instruments and equipment & accessories must be:accessories must be:

– Rated for the circuits and equipment to Rated for the circuits and equipment to which they will be connectedwhich they will be connected

– Designed for the environment in which Designed for the environment in which they will be usedthey will be used

Personal Protective Personal Protective Equipment…Equipment… Use electrical rated Use electrical rated

protective equipment when protective equipment when working in areas where working in areas where there is a potential there is a potential electricalelectrical

More on PPE ...More on PPE ...

Use, store & maintain your Use, store & maintain your Electrical PPE in a safe, reliable Electrical PPE in a safe, reliable condition condition

Wear nonconductive head Wear nonconductive head protectionprotection

Wear protective equipment for the Wear protective equipment for the eyes or face wherever there is eyes or face wherever there is danger of injury to the eyes or facedanger of injury to the eyes or face

PPE Inspection…PPE Inspection… Electrical PPE with any of the following Electrical PPE with any of the following

defects may not be useddefects may not be used– A hole, tear, puncture, or cut A hole, tear, puncture, or cut

– Ozone cutting or ozone checking (the Ozone cutting or ozone checking (the cutting action produced by ozone on cutting action produced by ozone on rubber under mechanical stress into a rubber under mechanical stress into a series of interlacing cracks) series of interlacing cracks)

AND….AND….

– Any of the following texture changes: Any of the following texture changes: swelling, softening, hardening, or becoming swelling, softening, hardening, or becoming sticky or inelastic. sticky or inelastic.

– An embedded foreign object An embedded foreign object – Any other defect that damages the Any other defect that damages the

insulating properties insulating properties

Don’t use defective Electrical PPE!Don’t use defective Electrical PPE!

PPE TestingPPE Testing

Rubber insulating line hoseRubber insulating line hose

• Upon indication that insulating Upon indication that insulating value is suspectvalue is suspect

Rubber insulating coversRubber insulating covers

• Upon indication that insulating Upon indication that insulating value is suspect.value is suspect.

PPE TestingPPE Testing Rubber insulating blanketsRubber insulating blankets

• Before first issue and every 12 monthsBefore first issue and every 12 months

Rubber insulating glovesRubber insulating gloves

• Before first issue and every 6 monthsBefore first issue and every 6 months

Rubber insulating sleevesRubber insulating sleeves

• Before first issue and every 12 monthsBefore first issue and every 12 months

Work Area Safety… Work Area Safety…

You must be able to see You must be able to see what you are doing when what you are doing when working on energized working on energized equipmentequipment

Energized partsEnergized parts

Do not work on energized electrical partsDo not work on energized electrical parts

• without adequate illumination without adequate illumination

• if there is an obstruction that if there is an obstruction that prevents seeing your work area prevents seeing your work area

• if you must reach blindly into areas if you must reach blindly into areas which may contain energized parts which may contain energized parts

Tools & EquipmentTools & Equipment

– Use insulated tools or Use insulated tools or handling equipment handling equipment when working near when working near exposed energized exposed energized conductors or circuit conductors or circuit parts. parts.

Tools & EquipmentTools & Equipment

– Use fuse handling Use fuse handling equipment to remove or equipment to remove or install fuses when the fuse install fuses when the fuse terminals are energized. terminals are energized.

Tools & EquipmentTools & Equipment

– Ropes and handlines Ropes and handlines used near exposed used near exposed energized parts must be energized parts must be nonconductive.nonconductive.

Alerting others…Alerting others…

Use safety signs, safety Use safety signs, safety symbols, or accident symbols, or accident prevention tags to warn prevention tags to warn others about electrical others about electrical hazards which may hazards which may endanger them. endanger them.

Alerting others…Alerting others…

Use barricades to prevent Use barricades to prevent or limit access to work or limit access to work areas with un-insulated areas with un-insulated energized conductors or energized conductors or circuit parts circuit parts

Alerting others…Alerting others…

If signs and barricades do If signs and barricades do not provide sufficient not provide sufficient warning and protection warning and protection from electrical hazards, an from electrical hazards, an attendant shall be stationed attendant shall be stationed to warn and protect to warn and protect employeesemployees

Conductive Work Conductive Work Locations…Locations… Portable electric equipment & Portable electric equipment &

flexible cords used in highly flexible cords used in highly conductive work locations where conductive work locations where employees are likely to contact employees are likely to contact water or conductive liquids, must water or conductive liquids, must be rated for the wet environmentbe rated for the wet environment

Electrical Systems…Electrical Systems…

InterlocksInterlocks – Only a qualified person may defeat an electrical Only a qualified person may defeat an electrical

safety interlock, and then only temporarily safety interlock, and then only temporarily while he or she is working on the equipmentwhile he or she is working on the equipment

– The interlock system must be returned to its The interlock system must be returned to its operable condition when work is completedoperable condition when work is completed

Electrical Systems…Electrical Systems…

After a circuit is de-energized After a circuit is de-energized by a circuit protective device, by a circuit protective device, the circuit may not be the circuit may not be manually reenergized until it manually reenergized until it has been determined that the has been determined that the equipment and circuit can be equipment and circuit can be safely energized.safely energized.

Over-Current Protection…Over-Current Protection…

Overcurrent protection of Overcurrent protection of circuits and conductors circuits and conductors may not be modified, even may not be modified, even on a temporary basison a temporary basis

System Markings..System Markings..

Electrical equipment may not be used Electrical equipment may not be used unless the manufacturer's name, unless the manufacturer's name, trademark, or other descriptive marking trademark, or other descriptive marking is placed on the equipment. is placed on the equipment.

Other markings shall be provided giving Other markings shall be provided giving voltage, current, wattage, or other voltage, current, wattage, or other ratings as necessary. ratings as necessary.

Circuit ID…Circuit ID… Identification of disconnecting means and Identification of disconnecting means and

circuitscircuits – Each disconnecting means for motors and Each disconnecting means for motors and

appliances shall be legibly marked to appliances shall be legibly marked to indicate its purposeindicate its purpose

– Each service, feeder, and branch circuit, at Each service, feeder, and branch circuit, at its disconnecting means or overcurrent its disconnecting means or overcurrent device, must be legibly marked to indicate its device, must be legibly marked to indicate its purpose purpose

Its Your Job….Its Your Job….

Know the hazards of electricityKnow the hazards of electricity Know the equipmentKnow the equipment Use Safe Work PracticesUse Safe Work Practices Inspect your PPE before each useInspect your PPE before each use Don’t work on energized circuits Don’t work on energized circuits

without permissionwithout permission

It’s your lifeIt’s your life