safety of electrical

Recognizing and Mitigating Specific Hazards in the Work Place Encountered by the Non-Electrical Skilled Worker

It is developed as an add-on module to the basic electrical safety training module for non-electrical workers.

This training provides additional electrical safety training for electrical hazards non-electrical skilled workers are exposed to in the work place.

Non-Electrical Skilled Worker

Review of Basic Electrical Safety Hazard Awareness for the Non-Electrical Worker

•   You should have taken as a prerequisite for this training “Basic Electrical Safety Hazard Awareness for Non-Electrical Personnel”.

v    This training covered the hazards associated with electrical energy – Shock, Arc and Blast.

Ø     These hazards can cause disability or death.

Ø     You were taught how to recognize electrical hazards.

 v    You were taught basic electrical safety that included:

Ø     Ground-fault Circuit Interrupters (GFCIs)

Ø     Basic electrical cord safety

Ø     Resetting Breakers

Ø     Conductive Apparel

Ø     Wall Penetrations

Ø     Safe Work Practices for Equipment Applications

Ø     Only qualified electrical workers can perform electrical work

 v     You were taught basic electrical safety that included:

Ø     What to do in case of an electrical emergency.

Ø     To inspect your work area for unsafe electrical conditions.

Ø     To use equipment per its Listing and Labeling instructions i.e. no daisy chaining, no overloading of circuits, etc.

Ø     What to do if you identify an electrical hazard.

Ø     To contact your Site Electrical Safety Officer or Safety Engineer for specific electrical safety items.

 v   The following list of workers includes but is not limited to those who would be considered a “Non-Electrical Skilled Worker”. 

Ø    Fitters, Painters, Carpenters, Laborers, Utility Operators, Equipment Operators, D&D Workers, Janitors, Radiation Control Technicians, Waste Handlers and Warehouse Workers.

 v   Non-Electrical Skilled workers are:

Ø    Exposed to specific electrical hazards

Ø    Expected to work safely around electrical energy

Ø    To use electrical tools safely

Ø    To follow electrical safety requirements

Ø    To help keep other workers safe from electrical hazards.

Ø    Obey all postings and barriers protecting exposed energized electrical hazards.

DOE and NFPA 70E Requirements

v   DOE has identified NFPA 70E (70E) as the basis document for electrical safety at its facilities.

v   Compliance with 70E is mandatory.

v   70E has specific requirements for working safely with electrical energy.

 v   Only Qualified Electrical Workers can perform work “ON” or “NEAR” electrical equipment 

v   Non-electrical workers may use electrical equipment, but must be trained to   know the hazards of the equipment and how to use the equipment safely.   

v   If you don’t know how to operate a piece of equipment safely and don’t know the hazards involved in it use, stop work and get the required training.  

v   70E requirements for energized work apply if an exposed energized condition exists.  

v   70E requires that an electrically safe work condition (Lockout/Tagout – LO/TO) must be established unless work around energized equipment with exposed electrical components is permitted with all the required safety precautions established.

 v   If an exposed energized condition exists, there will be a Flash Protection Boundary and a Shock Protection  Boundary that will have specific PPE and access requirements.

v   These boundaries are established to protect you from the heat energy of an arc and from getting shocked.

v   70E requires proper barriers, posting, and/or attendants to inform unqualified workers of existing hazards.

v   The work control document should address these boundaries and your work task relationship to them.

v   Do not cross these boundaries unless you are qualified and authorized or are escorted by a qualified electrical worker.

v   You must have the PPE required by 70E for the boundary to be crossed. 

electrical welding

Welding Processes

 A Brief History of Welding

  Late 19^th Century

Scientists/engineers apply advances in electricity to heat and/or join metals (Le Chatelier, Joule, etc.)

Early 20^th Century

Prior to WWI welding was not trusted as a method to join two metals due to crack issues

1930’s and 40’s

Industrial welding gains acceptance and is used extensively in the war effort to build tanks, aircraft, ships, etc.

Modern Welding

the nuclear/space age helps bring welding from an art to a science

 

  Weldability of a Metal

  Metallurgical Capacity Parent metal will join with the weld metal without formation of deleterious constituents or alloysMechanical SoundnessJoint will be free from discontinuities, gas porosity, shrinkage, slag, or cracksServiceabilityWeld is able to perform under varying conditions or service (e.g., extreme temperatures, corrosive environments, fatigue, high pressures, etc.)

 Fusion Welding Principles

 # Base metal is melted

 # Filler metal may be added

 # Heat is supplied by various means

 # Oxyacetylene gas

 # Electric Arc

 # Plasma Arc

 # Laser

 Fusion Welding