Session 5

Lesson 5Lesson 5

Why?Why?To protect:

• People

• PropertyAgainst:

• Electrical Hazard

• Mechanical HazardFor:

• Inspections

• Repairs

• Maintenance

In the ProcedureIn the ProcedureProtection of fellow workers via:Protection of fellow workers via:

A warning that the equipment in a particular A warning that the equipment in a particular area is being worked on and must not be area is being worked on and must not be

operated or the area enteredoperated or the area entered

Workcover RequiresWorkcover Requires

Only authorized persons with current Only authorized persons with current rescue breathing certification should rescue breathing certification should

apply lockout and tag out devicesapply lockout and tag out devices

Isolation Procedure OrderIsolation Procedure Order1. Assess the need

2. Notify affected people/Seek authority

3. Method of isolation

4. Test for supply

5. Isolate

6. Danger Tag

7. Test

8. Test tester

Isolation Procedure OrderIsolation Procedure Order1. Assess the need

Do you have the skills, qualifications, knowledge of the equipment to safely isolate a piece of equipment?

Equipment is normally remote from the isolation point. Equipment is normally remote from the isolation point.

Two people are generally requiredTwo people are generally required

Have you done a risk Have you done a risk assessment?assessment?

Isolation Procedure OrderIsolation Procedure Order1. Assess the need

2. Notify affected people/Seek authority

An isolation point may affect other machinery

May create a dangerous situation on other processes that are interlinked

Many companies require a “Clearance to Isolate” authorisation before isolation commences.

Isolation Procedure OrderIsolation Procedure Order1. Assess the need

2. Notify affected people/Seek authority

3. Method of isolation

Can be many locations in the electrical installation

Main Switch

Circuit Protection

Isolation switch near device

Isolation point must be able to LOCKED OUT

Isolation Procedure OrderIsolation Procedure Order1. Assess the need

2. Notify affected people/Seek authority

3. Method of isolation

4. Test for supply

Test equipment must comply with Australian Standards

Tests that there is a supply to the device

Be aware of automatic controlled equipment

Isolation Procedure OrderIsolation Procedure Order1. Assess the need

2. Notify affected people/Seek authority

3. Method of isolation

4. Test for supply

5. Isolate

Isolation point must be able to LOCKED OUT

Isolation Procedure OrderIsolation Procedure Order1. Assess the need

2. Notify affected people/Seek authority

3. Method of isolation

4. Test for supply

5. Isolate

6. Danger Tag

Two types of tag: Danger & Out of Service

Must be installed in such a way that it has to be removed to operate isolation point

Out of ServiceOut of ServiceUsed to Protect Equipment Only

Can be removed by anybody with authorisation

Can stay on equipment until repaired or replaced

Personal DangerPersonal Danger

Used to Protect Life

Can only be removed by the person who placed it there

Has to be removed when worker leaves danger area

Isolation Procedure OrderIsolation Procedure Order1. Assess the need

2. Notify affected people/Seek authority

3. Method of isolation

4. Test for supply

5. Isolate

6. Danger Tag

7. Test

Confirms that the correct isolation point has been used

Test equipment must comply with Australian Standards

Measure between:

Active & Neutral

Active & Earth + Exposed Conductive parts or Ground

Active & Other Actives

Isolation Procedure OrderIsolation Procedure Order1. Assess the need

2. Notify affected people/Seek authority

3. Method of isolation

4. Test for supply

5. Isolate

6. Danger Tag

7. Test

8. Test tester

Confirms that tester is functioning correctly

CautionCautionWhy is the ‘attempt to operate’ Why is the ‘attempt to operate’

isolation procedure not an isolation procedure not an effective method of verifying that effective method of verifying that

a circuit is de-energized?a circuit is de-energized?

mechanical failure of a switch mechanical failure of a switch contact cannot be determined by contact cannot be determined by

thethe‘‘attempt-to-operate’ methodattempt-to-operate’ method

• List the three factors required for combustion;• Classify fires according to the type of combustible

material involved;• Identify the types of fire extinguishers suitable for fighting

electrical fires;• List the procedures to follow in the event of a fire;• Carry out correct fire fighting techniques in putting out an

electrical fire;• List the correct first aid treatment for treating burn

injuries;• List the procedures for handling PCBs.

What are the three components that are required for a fire to exist?FU

EL

OXYGEN

HEAT

Fires are classified by the fuel typeClass A

Class B

Class C

Class D

Class E

Class F

• Wood• Paper• ClothFlammable liquids

Flammable Solids

Flammable Gasses

Combustible Metals

Electrical Fires

Cooking Fats or Oils

• Sodium• Titanium• Magnesium• Potassium• Steel• Uranium• Lithium• Plutonium• Calcium

ABE Dry ChemicalABE Dry ChemicalAmmonium phosphateIt receives its class A rating from the agent's ability

to melt and flow at 177°C to smother the fireMore corrosive than other dry chemical agents

BC Dry ChemicalBC Dry ChemicalSodium bicarbonatePotassium bicarbonatePotassium bicarbonate & Urea ComplexPotassium Chloride

Vaporising LiquidVaporising Liquid

Acts like liquid but “evaporates” leaving no residue

• Computer server rooms• Data centres• Areas housing sensitive electronic Equipment

Originally designed to fight fires in the highly delicate environments of hospital MRI rooms