769 Incidents involving electricity

Question 1

What are five main types of electricity company property?

Answer 1

• Power station
• Sub station
• Distribution cables/equipment
• Fenced enclosures
• Wind Turbines

Question 2

At a substation within a building what should the minimum Fire protection given by the room be?

Answer 2

4 Hours

Question 3

Should crews attempt to investigate sub surface pavement fires by removing covers etc?

Answer 3

No, not until authorised personnel have confirmed power is isolated and there is no risk of residual current

Question 4

What are 3 main insulating materials and their associated hazards?

Answer 4

PVC - Toxic fumes including hydrogen-chloride gas.
Polychlorinated Biphenyls (PCBs) - Highly toxic
Sulphur Hexafluoride (SF6) - asphyxiate, Full BA and advice of HMEPO or SA to be considered

Question 5

What two things should be confirmed at an incident involving a wind turbine?

Answer 5

That power has been isolated and that the blades have been “locked out”

Question 6

Maximum attendance time for authorised personnel at incidents involving electricity?

Answer 6

2 Hours

Question 7

What is the minimum safe distance from a live conductor for ground monitors and monitors on Aerial appliances?

Answer 7

30m

Question 8

What are the safe distances when working near Overhead Power Cables

Answer 8

5M - to affect a rescue
10M - when using a ladder or aerial appliance (20m training)
10M corridor - when approaching dense smoke or flames
20M corridor - when using Handheld Jets
30M corridor - when using monitors Aerial or Ground

Question 9

What is the usual cordon size for a wind turbine fire?

Answer 9

300m

Question 10

What does UPS stand for?

Answer 10

Uninterruptible Power Supply

Question 11

What is the maximum Voltage when using electrical gloves for a rescue?

Answer 11

3300V

Question 12

What are the limits of High and Low Voltage

Answer 12

High Voltage - More than 1000V(ac)1500V(dc) Low Voltage - 1000V(ac) or less 1500V(dc)