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Electrical Safety. Reference: The Power of Training Electrical Safety Commonwealth Edison Company. Knowledge Objectives. The Firefighter shall be able to: Explain the basic function of overhead wires and equipment Identify Type A and S Meters

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Presentation Transcript
Electrical safety

Electrical Safety

Reference: The Power of Training

Electrical Safety

Commonwealth Edison Company

MABAS Division 10 - Com Ed Program


Knowledge objectives
Knowledge Objectives

  • The Firefighter shall be able to:

    • Explain the basic function of overhead wires and equipment

    • Identify Type A and S Meters

    • Explain hazards of step potential, touch potential, vehicles in contact with energized lines, and downed wire movement

MABAS Division 10 - Com Ed Program


Performance objectives
Performance Objectives

  • Given the proper tools and equipment, the firefighter shall be able to:

    • Remove residential meters

    • Conduct low voltage electrical tests

    • Cut service entrance “drip loops”

MABAS Division 10 - Com Ed Program


Introduction
Introduction

  • This program is designed to train firefighters in properly removing meters or cutting drip loops to disconnect service to a residence that is on fire.

  • ComEd prefers that the electrical service be left intact

  • Call ComEd for service disconnects

MABAS Division 10 - Com Ed Program


If the incident commander decides the service must be disconnected immediately
If the Incident Commander decides the service must be disconnected immediately:

  • Call ComEd

  • Open buildings main disconnect

  • Remove meter if necessary

  • Cut drip loops when meter cannot be removed

  • Utilize Voltage Tester to verify power disconnect

MABAS Division 10 - Com Ed Program


Firefighters are only to remove the meter to the residence that is on fire
Firefighters are only to remove the meter to the residence that is on fire

MABAS Division 10 - Com Ed Program


Transmission distribution system
Transmission & Distribution System that is on fire

  • Power Plants

  • Switchyard

  • Transmission

  • Substation

  • Distribution Transformers

  • Residential Service

MABAS Division 10 - Com Ed Program


Transmission pole configuration
Transmission Pole Configuration that is on fire

  • Highest voltage is usually located at top of pole.

    • Other voltages may be present on pole also

  • Transmission Poles

  • Distribution Poles

  • Secondaries

  • Cable and Phone may also be present

MABAS Division 10 - Com Ed Program



Residential meters
Residential Meters that is on fire

  • Removable (type S)

  • Non Removable (type A)

MABAS Division 10 - Com Ed Program





Downed wires
Downed Wires that is on fire

  • Voltage Gradient is present

    • Consider the Step Potential

  • Guarding wires and exposed live electrical equipment

  • Principles for guarding wires, and electrical equipment

  • Precautions

  • Rescue Procedures

MABAS Division 10 - Com Ed Program



All cables wires must be treated as energized until proven dead
All cables & wires must be treated as energized until proven dead !

MABAS Division 10 - Com Ed Program


Service wires
Service Wires dead !

  • Identifying Service Drop Cable

    • Open Wire construction

    • Triplex

  • Identifying telephone and cable wires

MABAS Division 10 - Com Ed Program


When service is to be interrupted follow these steps
When service is to be interrupted dead !Follow these steps:

  • Don protective equipment

  • Open Mains if possible

  • Remove meter if necessary

  • Cut the tap (drip loops) at the house

MABAS Division 10 - Com Ed Program


Safety equipment needed
Safety Equipment Needed dead !

  • Rubber glove set

    • Leather over rubber

  • Eye/Face protection

  • Full Protective clothing recommended

  • Voltage Tester

  • Meter Cover

  • Hotstick

MABAS Division 10 - Com Ed Program


Rubber gloves and protectors
Rubber gloves and protectors dead !

  • Precautions

  • Testing and Inspecting

  • Exchange

MABAS Division 10 - Com Ed Program


Live line tool
Live Line Tool dead !

  • Also known as Hotstick

    • Inspect for damage prior to use

    • Tool may be used for cutting drip loops only!!

MABAS Division 10 - Com Ed Program


Low voltage tester
Low Voltage Tester dead !

  • Tests for de-energized circuits

  • Tests for secondary voltage

  • Checking & using

    • Condition

    • Operation

  • Interpreting the tester reading

MABAS Division 10 - Com Ed Program


Removing a type s meter
Removing a Type S Meter dead !

  • Protective Clothing required

  • Open disconnect if possible

  • Remove meter

    • Cut meter seal with wire cutters

    • Remove meter retaining ring

    • Contact top outer edge with a downward and outward angle

    • Grasp meter with two hands and pull straight out. Do not twist meter while removing

MABAS Division 10 - Com Ed Program


Steps for cutting drip loops
Steps for Cutting Drip Loops dead !

  • Identify the drip loop at building

  • Identify the neutral wire first DO NOT CUT

  • X and Y conductors should be cut

    • Separate two parts from each other

  • Cut neutral wire

  • Avoid cutting support wire if present

MABAS Division 10 - Com Ed Program



Summary
Summary dead !

  • This program was designed to aid the firefighter on the scene of a fire or emergency to correctly and safely remove electrical hazards.

  • WHEN IN DOUBT, WAIT FOR ComEd TO ARRIVE ON THE SCENE

MABAS Division 10 - Com Ed Program


Written exam and practical
Written Exam and Practical dead !

  • Take 15 question written examination

  • Complete practical evaluation

    • Cut Drip loop connection

    • Identify type A and S meters

      • Remove type S meter

MABAS Division 10 - Com Ed Program


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