Clearances, OKs TO, and Diagnostic Test Authorizations (DTAs)
A permits the performance of specified work on specified circuits
Work Authority
Work Authorities are required when any of the following apply
When a worker needs to be protected from hazardous energy in order to perform
work safely
When the crew supervisor, Field Representative, Facility Operations Manager,
or Superintendent-level supervisor deems a Work Authority is necessary
When work may affect the reliability, capacity, capability, availability, or
response rate of the Power System or any component of System Equipment
A on any circuit requires that it be Disconnected from specified sources of hazardous energy (usually electrical), and remain Disconnected until the Clearance is released, or turned in
Clearance
True/False
A Clearance may originate from any Issuing Authority.
True
When used to describe the preparation of electrical circuits for a Work Authority, means that an open, usually one that is visible, exists between specified sources of electrical energy and the circuit that is being prepared for work. Sources of visible disconnection include
Disconnected
True/False
A Clearance is required when it is necessary to enter within the MAD of a circuit that is normally energized above 600-V.
True
MAD
4.8kv
34.5kv
230kv
2'1" - 25"
2'7' - 31"
6'8" - 80"
A is a Clearance issued on System Equipment that originates from an Issuing Authority. These Clearances are either issued to a Field Representative, a Facility Field Representative, or directly to an Authorized Person performing work (Work Authority Holder).
Primary Clearance
Permits work to be done by Authorized Persons on System Equipment within the scope of the original Primary Clearance that was issued by the Issuing Authority to the Field Representative.
Secondary Clearance
True/False
Multiple Secondary Clearances may be issued to different Authorized Persons based on the original Primary Clearance, so long as the nature of the work and the time to complete the work fits within the scope and time frame of the Primary Clearance
True
A Local Clearance is a Clearance that originates from a Facility Field Representative. It may be issued in the following circumstances
On Local Equipment under Local Jurisdiction
Circuits operating at 600-V and below
Contained within one Electric Station
Not otherwise designated as System Equipment
On pieces of System Equipment on which a Switch, Work, and Restore (SWR) has been issued
A Bid is submitted to the
Area Scheduler
A predetermined time by which the circuit is expected to be returned to normal.
Estimated Time of Return (ETR)
True/False
The key word to look for when using this type of “large,” or Boundary Clearance, is including
