Step 7 Red Book

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Step 7 Red Book
2011-07-15 19:25:42
step7 redbook

tacoma power red book exam questions
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  1. The Definition of Clearance is: A verbal notice from a Tacoma Power Dispatcher to a Qualified employee stating that a line or piece of equipment is considered what?
    • Killed cleared and tagged under stated conditions.
    • Safe to test for dead and install shorts and grounds.
    • The control for that line or equipment has been turned over to the employee receiving the clearance.
  2. Definition of a Clearance limit?
    A visible air break or physical separation from a known source of electrical potential that has been Red Clearance tagged for a Qualified employee.
  3. Definition of a Qualified employee?
    • A person familiar with the construction of and or operation of lines or equipment that concern their position.
    • Fully aware of the hazards associated therewith.
    • Or, one who has passed a journey status examination of the electrical trades with which they may be connected.
  4. Definition of a Visible Air Break?
    A secured opening in a circuit that can be readily seen; to include air break switches, fused cutouts, and manually operated disconnect switches.
  5. What is the responsibility of the System Dispatcher?
    • Identify themself to the crew.
    • Obtain the names of the person(s) requesting clearance(s)
    • Assure themself that each person is qualified to receive such a clearance and is fully aware of the limits of the clearance.
    • Ensure that all switching communications are repeated back to the dispatcher word for word.
    • Issue and release clearances on Tacoma Power electrical lines and equipment over 600 volts.
  6. What is the responsibility of the Switch Person?
    • To perform all switching and tagging as directed and in the sequence given by the dispatcher.
    • Identify themselves to the dispatcher by name, radio call number, and location.
    • Ensure the clearance tags are properly filled out and placed.
    • Provide for their own personal safety.
  7. What is the responsibility of the Clearance Holder?
    • Plan for their clearance.
    • Provide the dispatcher with adequate information about the scope of work and clearance limits needed.
    • Contact and inform customers affected by clearance and make necessary arrangements.
    • Perform switching and tagging, in some cases.
    • Obtain name of dispatcher issuing the clearance.
    • Repeat all communications back to dispatcher word for word.
    • Provide for the safety of the crew.
  8. General rules for switching and tagging:
    • Complex switching situations or operations shall be discussed with the Dispatcher before hand.
    • Switching orders involving OH, URD, and UG systems shall be conducted over normal radio channels whenever possible.
    • Scheduled outages will be discussed with the Dispatcher at least 1 hour prior to switching to allow the Dispatcher time to prepare a Job and Outage Report.
    • After all switching and tagging for a clearance has been performed and a clearance issued, the lines or equipment shall be tested to ensure they are de energized.
  9. The proper placement of Red Clearance Tags include:
    • The switch handle of a gang operated switch.
    • Each phase of lifted and parked load break elbows.
    • The ring of a hook operated switch, (on the center phase if all three phases are open).
    • An open jumper using a hot clamp.
    • The tag holder on the control panel door of a rolled out PCB.
  10. What information is necessary on properly filled out Red Clearance Tags?
    • TAGGED FOR: person who will hold the clearance.
    • LOCATION: description of line or equipment being cleared.
    • DEVICE: designation of the switch or equipment being opened, checked open, or removed.
    • TIME and DATE: when the switch was opened, checked open, or removed.
    • TAGGED BY: person performing switching and tagging.
    • ORDERED BY: name of dispatcher, (first initail and last name).
  11. Yellow Caution Tags shall be used when necessary to indicate a hazardous situation, potential hazard, or unsafe condition that presents a threat of employee injury and placed on equipment or device so it can be easily seen. Examples where they are used:
    • Info Tag: provide information about an abnormal condition.
    • Hot Line Work: indicate a reclosing relay is out of service when Hot Line Work is being performed.
    • Hold Open: indicate a hold open on device or equipment when work is to stop for extended periods of time.
  12. Hold Opens are used when a line or equipment is to be out of service for an extended period of time or while waiting for work to be performed at a later date. What is a hold open designed to protect?
    • Equipment from damage, not personnel!
    • Maintenance or work WILL NOT be performed under a Hold Open.