Electricity

Question 1

Voltage

Answer 1

Low voltage = below 1000V

High voltage = anything above 1000V

Question 2

Rescue Flowchart

Answer 2

Is the person alive?
Y - continue N - keep everyone 5m

Confirmed power off?
Y - perform rescue
N - is the casualty more than 5m away from elec. or anything touching it?

Y- pull casualty clear with elec. gloves/non- conducting
N - less than 1000V?

Y- pull casualty….
N - keep everyone 5m away

Question 3

What are electrical causes of fire?

Answer 3

•Short circuits during works
•Overheating due to overloading or lack of ventilation
•Ignition of combustible substances by electro-static discharge..

Question 4

Operational considerations

Answer 4

The fire service will request the attendance of a representative from the electricity company to act as an ‘authorised person’.
•May issue a safety document
•Will confirm the electricity is isolated
•May authorise personnel to climb OHL supports

Question 5

Overhead lines

Answer 5

In smoke or flames approaching conductor - 10m

In training - 20m

Hand held hose - 20m
Monitor - 30m

Operational working without hose - 10m