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1
Q

Major causes of electrical shock

A

Pre occupation
Ignorance
Over familiarity
Laziness
Physical hazards
Horseplay

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2
Q

3 main steps to prevent electrical shock

A

Know the hazards

Maintain safety discipline

Develop habit of noticing potential dangers

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3
Q

Basic causes of electrical shock

A

Equipment failure (non direct contact)

Human failure (direct contact)

Combination of equipment and human failure

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4
Q

1mA effects

A

Involuntary reaction

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5
Q

10mA effect

A

Prevent you releasing your hold

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6
Q

20mA effect

A

Physical damage

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7
Q

30mA effect

A

Can kill

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8
Q

Damp surfaces will … the resistance

A

Lower

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9
Q

What voltage is considered dangerous to work on

A

30V

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10
Q

What voltage is considered safe to work on

A

24v or less

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11
Q

1st and 2nd steps of shock procedure

A
  1. Raise alarm
  2. Isolate casualty from supply (switch off supply)
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12
Q

If you cannot isolate a casualty from the power supply what should you do?
(Step 3 of Shock Procedure)

A

Stand on insulated material

Push casualty clear of contact using insulated material

Don’t touch casualty with bear hands as the body will conduct electricity

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13
Q

Step 4 of Shock procedure
(Once casualty is isolated from power supply)

A

Check for a response
Shake shoulders

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14
Q

What to do if there is no response from a casualty?

A

Shout for help
Open airways
Check breathing
If not breathing:
30 Chest compressions, 2 rescue breaths

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15
Q

What is LOTO

A

Method of isolation for systems + equipment

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16
Q

Reasons for isolating equipment using LOTO

A

Allows maintenance to proceed safely
Isolate defective equipment
Isolate where equipment is removed

17
Q

4 parts of LOTO

A

Index sheet
Safety certificate
Label
Display board

18
Q

3 parts of LOTO label

19
Q

LOTO ON Steps:

A
  1. Obtain permission
  2. Identify points of isolation
  3. Inform end users
  4. Complete index sheet
  5. Full in safety certificate
  6. Complete LOTO Labels
  7. Attach part A to points of isolation
  8. Part B on display board with Part C with fuses/keys
20
Q

Fuse removal:

A

With equipment turned OFF
A. Place ☞ in centre of fuse holder
B. With free hand unscrew fuse holder
C. Turn head away and remove holder
D. Remove fuse
E. Replace fuse holder

21
Q

LOTO OFF Steps:

A
  1. Obtain permission
  2. Full on safety certificate
  3. Collect parts B + C
  4. Remove part A, replace fuses
  5. Return label to AP
  6. Complete safety Certificate
  7. Destroy labels
  8. Close LOTO index

L Saftey (1 decks)

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