ST_19 Flashcards
What is the purpose of ST_19?
To enhance safe working conditions and to provide criteria for mitigating the risk of shock and arc flash hazards during equipment use that may result in personal injury
What are the three electrical hazards?
Shock, arc flash, arc blast
Who is responsible for generating arc flash warning labels to attached equipment?
Electrical engineering services
Who is responsible for determining and providing PPE with ATPV?
Supervisor
Are you allowed to use any random face guard or PPE?
No, must be arc rated
What does FR stand for?
Flame resistant
Testing instruments and their accessories should be what before using?
Should be rated for circuits and equipment
What are the rules for an unqualified worker in a limited boundary?
Not allowed to enter unless a qualified person advise them of hazards
What are the rules for an unqualified worker in a restricted boundary?
Can’t cross the boundary at all
What is the approach boundary for a fix conductor at 480 V?
3ft 6in
What is the category two rating on PPE for ATPV?
8 cal/cm^2
What are the two situations you are allowed to work on an energized circuit?
Testing and troubleshooting
An electrical JHA, NFPA 70 E, should be held at the following times:
Before the start of each workday and new job, if worksite conditions change, if the personnel assign to the job change
What is an exclusion area?
Clearly marked area where personnel are not required to wear FR clothing
What is the volts limit for something to be energized?
50 volts
In order to work on a circuit 50 V or greater it must be ____?
Deenergized
When should working on energized equipment be permitted?
When appropriate safe work practices are used, work is performed by qualified workers, and proper PPE is worn as required
How should gloves and equipment be taken care of?
Properly handled and stored, carefully inspected before use, and periodically proof tested
How often does OSHA require a glove to be tested?
Every six months
Is jewelry allowed to be worn when working with energized equipment?
No
What class of gloves are used for 480V?
00 gloves
What is required to be worn over rubber gloves
Leather protectors
What is considered the industrial standard and is periodically updated about every three years?
NFPA 70 E
What current level causes fibrillation?
100 mA
