Electrical Safety Reference: The Power of Training Electrical Safety Commonwealth Edison Company MABAS Division 10 - Com Ed Program

MABAS Division 10 - Com Ed Program 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 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

MABAS Division 10 - Com Ed Program 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

MABAS Division 10 - Com Ed Program 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

MABAS Division 10 - Com Ed Program Firefighters are only to remove the meter to the residence that is on fire MABAS Division 10 - Com Ed Program

Transmission & Distribution System Power Plants Switchyard Transmission Substation Distribution Transformers Residential Service MABAS Division 10 - Com Ed Program

Transmission Pole Configuration 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

MABAS Division 10 - Com Ed Program

MABAS Division 10 - Com Ed Program Residential Meters Removable (type S) Non Removable (type A) MABAS Division 10 - Com Ed Program

MABAS Division 10 - Com Ed Program

MABAS Division 10 - Com Ed Program

MABAS Division 10 - Com Ed Program

MABAS Division 10 - Com Ed Program Downed Wires 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

MABAS Division 10 - Com Ed Program

All cables & wires must be treated as energized until proven dead ! MABAS Division 10 - Com Ed Program

MABAS Division 10 - Com Ed Program Service Wires 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: 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 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 Precautions Testing and Inspecting Exchange MABAS Division 10 - Com Ed Program

MABAS Division 10 - Com Ed Program Live Line Tool 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

MABAS Division 10 - Com Ed Program Low Voltage Tester Tests for de-energized circuits Tests for secondary voltage Checking & using Condition Operation Interpreting the tester reading MABAS Division 10 - Com Ed Program

MABAS Division 10 - Com Ed Program Removing a Type S Meter 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 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

MABAS Division 10 - Com Ed Program

MABAS Division 10 - Com Ed Program Summary 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 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