why should test leads be high as your meter?
What is Hot work?
Test Equipment and Safety Precautions
Distribution systems and loads are becoming more complex, increasing the risk of transient power spikes.
Lightning strikes on outdoor transmission lines and switching surges from normal switching operations can also produce dangerous high-energy transients. Motors, capacitors, variable speed drives, and power conversion equipment can also generate power spikes.
Safety systems are built into test equipment to protect electricians from transient power spikes.
The next slide presents some points that should be taken into consideration when selecting test equipment.
Keep the following points in mind when selecting a meter:
• Choose a meter rated for the highest category you will be working in.
• Select the appropriate voltage level.
• Make sure that your test leads are rated as high as your meter.
• Choose meters that are independently tested and certified.
Safety must be the primary responsibility of all personnel on a job site. The safe installation, maintenance, and operation of electrical equipment requires strict adherence to local and national codes and safety standards, as well as facility and company safety policies.
Carelessness can result in serious injury or death due to electrical shock, burns, falls, flying objects, etc.
After an accident has occurred, investigation almost always shows that it could have been prevented had simple safety precautions and procedures been followed.
As an electrician, it is your personal responsibility to identify and eliminate unsafe conditions and unsafe acts that cause accidents.
Safety can never be stressed enough. There are times when your life literally depends on it.
The following precautions need to be taken when working with electrical test equipment:
1. Thoroughly inspect all test equipment before each use.
• Check for broken leads or knobs, damaged plugs, or frayed cords.
• Do not use equipment that is wet or damaged.
2. Make sure the rating of any leads or accessories meets or exceeds the rating of the meter.
3. Do not work with energized equipment unless you are both qualified and approved by your supervisor.
4. Never shortcut safety; strictly adhere to all energized work policies and procedures.
5. When testing circuits, test at higher ranges first, then work your way down to lower ranges.
6. Always have a standby person present during hot work; he should know whom to contact in case of emergency and how to disconnect the power.
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