This time the pressure is on!
You have to get “the grinder” back up and running… if you don’t know what a grinder is just think of a heavy piece of machinery used to break material up into to smaller pieces… so it could be a mining operation that breaks stones into smaller pieces or maybe a sawmill which is grinding bark.
Normal operation - when you operate a piece of electrical equipment the way it was designed to be operated then that is considered a normal operation.
Why is this important?
Because a lot of arc flashes occur when things are not operated normally… a disconnect operated under load, a breaker racked in on live bus, or an e-stop used as an on/off switch are all examples of equipment being operated outside their normal operating conditions.
Resources required for this scenario
A “contractor kit” is really just all the required arc-flash protection in one easily accessible package.
Nowadays, you can get these kits in almost any incident energy rating, but the most common are:
Cat 2 Kit - Arc rating of 8 cal/cm2
Cat 4 Kit - Arc rating of 40 cal/cm2
They should also come with a set of rubber insulated gloves and leather protectors.
The most important tool for any electrical worker and what should also be considered your most important piece of safety equipment!
Test before touch needs to become your new mantra, and with low voltage (less than 750 volts) circuits you must verify phase-to-phase and phase-to-ground is at zero energy.
Never assume a circuit is dead until you’ve proven it with your tester!
Non-contact high voltage detector
Equally as important, but for high voltage, the non-contact detector is the difference between life and death.
Every time you are working on or near exposed conductors you need to verify absence of voltage prior to starting the work (unless you are working energized… but we will get to that later).
As opposed to low voltage testing you are unable to verify phase-to-phase and phase-to-ground with the use of a non-contact detector… so along with this, temporary protective grounding needs to be employed to ensure the system is at zero energy!
Rubber insulated gloves with leather protectors
By now you should be getting the point.
Rubber insulated gloves with leather protectors are a must for just about every electrical job!