Electrica_Safety

1. ElectricalElectrical
SafetySafety

2. DefinitionsDefinitions
Exposed partExposed part
Live or energized partLive or energized part
De-energizedDe-energized
partpart
1a

3. DefinitionsDefinitions
De-energized exposed parts thatDe-energized exposed parts that
are not locked/tagged areare not locked/tagged are
considered to be energizedconsidered to be energized
exposed partsexposed parts
1b

4. Working on or nearWorking on or near
exposed electrical partsexposed electrical parts
Don’t work on or near exposedDon’t work on or near exposed
electrical parts unless:electrical parts unless:
• the part isthe part is
de-energized; andde-energized; and
• the part isthe part is
locked/tagged outlocked/tagged out
2a

5. Working on or nearWorking on or near
exposed electrical partsexposed electrical parts
Lockout/tagout must beLockout/tagout must be
performed by a qualified personperformed by a qualified person
Who is qualified?Who is qualified?
2b

6. Clearance for unguarded,Clearance for unguarded,
overhead energized linesoverhead energized lines
For elevated surfaces andFor elevated surfaces and
voltages 50kv or less to ground:voltages 50kv or less to ground:
• the distance is 10 feetthe distance is 10 feet
3a

7. Clearance for unguarded,Clearance for unguarded,
overhead energized linesoverhead energized lines
For elevated surfaces andFor elevated surfaces and
voltages greater than 50 kv tovoltages greater than 50 kv to
ground:ground:
• the distance is 10 feet plus 4the distance is 10 feet plus 4
inches for every 10 kv greater thaninches for every 10 kv greater than
50 kv50 kv
3b

8. Clearance for unguarded,Clearance for unguarded,
overhead energized linesoverhead energized lines
When working on the ground inWhen working on the ground in
the vicinity of unguarded,the vicinity of unguarded,
energized overhead lines 50 kvenergized overhead lines 50 kv
or less to ground:or less to ground:
• keep conductive objects at leastkeep conductive objects at least
10 feet away10 feet away
3c

9. Clearance for unguarded,Clearance for unguarded,
overhead energized linesoverhead energized lines
When working on the ground inWhen working on the ground in
the vicinity of unguarded,the vicinity of unguarded,
energized overhead linesenergized overhead lines
greater than 50 kv to ground:greater than 50 kv to ground:
• keep conductive objects at leastkeep conductive objects at least
10 feet away, plus 4 inches for10 feet away, plus 4 inches for
every 10 kv over 50 kvevery 10 kv over 50 kv
3d

10. Clearance between overheadClearance between overhead
lines and vehicles/equipmentlines and vehicles/equipment
For voltages 50 kv or less:For voltages 50 kv or less:
• the clearance distance is 10 feetthe clearance distance is 10 feet
For voltages greater than 50 kv:For voltages greater than 50 kv:
• the clearance is 10 feet plus 4the clearance is 10 feet plus 4
inches for every 10 kv over 50 kvinches for every 10 kv over 50 kv
4a

11. Clearance between overheadClearance between overhead
lines and vehicles/equipmentlines and vehicles/equipment
For vehicles in transit and theFor vehicles in transit and the
structure is lowered:structure is lowered:
• the clearance distance is 4 feet forthe clearance distance is 4 feet for
50 kv or less; or50 kv or less; or
• the clearance distance is 4 feetthe clearance distance is 4 feet
plus 4 inches for every 10 kv overplus 4 inches for every 10 kv over
50 kv for voltages greater than 5050 kv for voltages greater than 50
kvkv
4b

12. Clearance between overheadClearance between overhead
lines and vehicles/equipmentlines and vehicles/equipment
When insulating barriersWhen insulating barriers
designed for line voltage aredesigned for line voltage are
installed, and not attached to,installed, and not attached to,
or part of, the vehicle oror part of, the vehicle or
mechanical equipment:mechanical equipment:
• the clearance is the designedthe clearance is the designed
working dimensions of the barrierworking dimensions of the barrier
4c

13. Clearance between overheadClearance between overhead
lines and vehicles/equipmentlines and vehicles/equipment
Avoid contact with anyAvoid contact with any
vehicles, mechanicalvehicles, mechanical
equipment, or parts underequipment, or parts under
energized lines unless:energized lines unless:
• Employee is wearing the properEmployee is wearing the proper
PPE; orPPE; or
• Equipment/vehicle is located soEquipment/vehicle is located so
that no uninsulated part canthat no uninsulated part can
provide a conductive path toprovide a conductive path to
employeesemployees 4d

14. Clearance between overheadClearance between overhead
lines and vehicles/equipmentlines and vehicles/equipment
Do not stand near the groundingDo not stand near the grounding
location for intentionallylocation for intentionally
grounded equipment or vehiclesgrounded equipment or vehicles
when contact with overheadwhen contact with overhead
wires is possiblewires is possible
Use insulation and barriers toUse insulation and barriers to
protect employees from theprotect employees from the
grounding areagrounding area
4e

15. Use of nonconductiveUse of nonconductive
laddersladders
Portable ladders must havePortable ladders must have
nonconductive siderails whennonconductive siderails when
used near energized partsused near energized parts
Metal ladders can conductMetal ladders can conduct
electricity and cause arcing andelectricity and cause arcing and
shocksshocks
5a

16. Hazards of conductiveHazards of conductive
apparelapparel
Conductive jewelry and clothingConductive jewelry and clothing
can cause arcing when exposedcan cause arcing when exposed
to energized partsto energized parts
If conductive jewelry andIf conductive jewelry and
clothing are not removed, theyclothing are not removed, they
must be covered so they are nomust be covered so they are no
longer conductivelonger conductive
6a

17. Procedures for using portableProcedures for using portable
electrical equipmentelectrical equipment
Proper handling of cordsProper handling of cords
• Don’t raise or lower equipment byDon’t raise or lower equipment by
its cordits cord
• Don’t unplug the equipment byDon’t unplug the equipment by
pulling on its cordpulling on its cord
• Don’t staple or fastenDon’t staple or fasten
the cord so as tothe cord so as to
damage outer jacketdamage outer jacket
7a

18. Procedures for using portableProcedures for using portable
electrical equipmentelectrical equipment
Equipment inspectionEquipment inspection
• Visually check for:Visually check for:
– loose partsloose parts
– deformed or missing partsdeformed or missing parts
– damaged jackets ordamaged jackets or
insulationinsulation
7b

19. Procedures for using portableProcedures for using portable
electrical equipmentelectrical equipment
Equipment inspectionEquipment inspection
• Inspect for internal defects, asInspect for internal defects, as
indicated by pinched or crushedindicated by pinched or crushed
outer jacketsouter jackets
• Perform inspectionsPerform inspections
prior to beginningprior to beginning
each shifteach shift
7c

20. Procedures for using portableProcedures for using portable
electrical equipmentelectrical equipment
Equipment inspectionEquipment inspection
• Remove defective equipment fromRemove defective equipment from
serviceservice
• Check the plug and receptacleCheck the plug and receptacle
mating configurationmating configuration
before connectingbefore connecting
7d

21. Procedures for using portableProcedures for using portable
electrical equipmentelectrical equipment
Flexible cordsFlexible cords
• Flexible cords with grounding-typeFlexible cords with grounding-type
of equipment must have anof equipment must have an
equipment grounding conductorequipment grounding conductor
• Never remove or alter theNever remove or alter the
cord’s grounding pincord’s grounding pin
• Never use an adapterNever use an adapter
with a missingwith a missing
grounding pingrounding pin
7e

22. Procedures for using portableProcedures for using portable
electrical equipmentelectrical equipment
Electrical equipment and cordsElectrical equipment and cords
to be used near water must beto be used near water must be
approved for this useapproved for this use
7f

23. Procedures for using portableProcedures for using portable
electrical equipmentelectrical equipment
Plugging/unplugging cord andPlugging/unplugging cord and
cord-connected equipment andcord-connected equipment and
flexible cordsflexible cords
• Ensure hands are dryEnsure hands are dry
• Never pull the plugNever pull the plug
out by the cordout by the cord
7g

24. Procedures for using portableProcedures for using portable
electrical equipmentelectrical equipment
Plugging/unplugging cord andPlugging/unplugging cord and
cord-connected equipment andcord-connected equipment and
flexible cordsflexible cords
• Handle cords and equipment withHandle cords and equipment with
insulating protective equipmentinsulating protective equipment
when the cord connector is wetwhen the cord connector is wet
• Secure locking-type connectorsSecure locking-type connectors
after making connectionafter making connection
7h

25. Procedures for using portableProcedures for using portable
electrical equipmentelectrical equipment
Circuit breakers and circuitsCircuit breakers and circuits
• Never use the following to openNever use the following to open
and close electrical circuitsand close electrical circuits
– FusesFuses
– Terminal lugsTerminal lugs
– Cable connectorsCable connectors
– Cable spliceCable splice
connectionsconnections
7i

26. Procedures for using portableProcedures for using portable
electrical equipmentelectrical equipment
Circuit breakers and circuitsCircuit breakers and circuits
• Don’t manually re-energize aDon’t manually re-energize a
circuit without first determining ifcircuit without first determining if
the equipment and circuit can bethe equipment and circuit can be
safely energizedsafely energized
7j

27. Procedures for using portableProcedures for using portable
electrical equipmentelectrical equipment
Circuit breakers and circuitsCircuit breakers and circuits
• Repeatedly closing a circuitRepeatedly closing a circuit
breaker or replacing a fuse is notbreaker or replacing a fuse is not
allowedallowed
• Keep flammablesKeep flammables
and combustiblesand combustibles
away from electricalaway from electrical
equipmentequipment
7k

28. Protective equipmentProtective equipment
Use appropriate protectiveUse appropriate protective
equipment in damp or wetequipment in damp or wet
environmentsenvironments
Inspect protective equipment toInspect protective equipment to
ensure reliabilityensure reliability
Guard normally enclosed liveGuard normally enclosed live
parts during maintenanceparts during maintenance
8a

29. Alerting techniquesAlerting techniques
Signs and markingsSigns and markings
BarricadesBarricades
AttendantsAttendants
9a

30. Summary of key pointsSummary of key points
DefinitionsDefinitions
De-energized meansDe-energized means
locked/tagged outlocked/tagged out
Safe distances for clearancesSafe distances for clearances
between workers and energizedbetween workers and energized
lineslines
10a

31. Summary of key pointsSummary of key points
Nonconductive laddersNonconductive ladders
Nonconductive clothingNonconductive clothing
Proper use of cords, plugs,Proper use of cords, plugs,
receptaclesreceptacles
10b

32. Summary of key pointsSummary of key points
Proper use of electricalProper use of electrical
equipment aroundequipment around
flammables/combustiblesflammables/combustibles
Protective equipmentProtective equipment
Alerting techniquesAlerting techniques
10c