In this scenario you are introduced to the concept of shock hazard. A very powerful force that is greatly underestimated in the electrical world.
Did you know that the number one cause of electrically related fatalities are caused by a shock… and what’s even scarier is that it is usually a shock received at your everyday household voltage… 120 volts.
Try out the scenario, attempt to rescue Tyler… and keep yourself safe while you are at it!
Locked-out - When something is “locked-out” it means that we have operated the disconnect and verified that the machine won’t start again (usually by pressing the start button), and then placed our personal locks on the disconnect so it cannot be operated again.
Do not confuse this with being an electrically-safe-work-condition… if you can achieve this, then that means you would feel comfortable putting your bare hands on the exposed conductors and circuit parts. There are additional steps you need to take to achieve this (it will come later in the course).
Resources required for this scenario
Rubber insulated gloves
Rubber insulated gloves are your primary protection from a shock hazard.
Each set of gloves will come stamped with a rating. You must ensure you are wearing gloves that are rated higher than the voltage you are working on!
Class 0 - Color Red - Max Use 1,000 VAC
Class 1 - Color White - Max Use 7,500 VAC
Class 2 - Color Yellow - Max Use 20,000 VAC
Gloves must be inspected for cuts/holes prior to use and tested every 6 months.
Each set of gloves will come with a pair of leather protectors. The purpose of the leather protectors is to protect the integrity of the rubber insulated glove.
The leather protectors, on their own, should not be used for shock protection.
Insulated Rescue Hook
An insulated rescue hook is just about the only approved means to safely remove a victim from a shock hazard source.
Unfortunately, if the power has not been shut off or tripped off by the time someone actually gets the rescue hook in place, it’s usually too late.
This is why job planning and emergency preparedness are so vital.
First aid kits, Burn kits & Automated External Defibrillator (AED)
Knowing where the first responder tools are prior to starting a task is a must.
When the worst happens, the victim does not have the time for you to go and find any of these items… especially and AED.
When a person’s heart goes into ventricular fibrillation (heart quivers) you may only have minutes to react before cardiac arrest.