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Electrical Safety for Electricians and Linemen - PowerPoint PPT Presentation


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Construction Workforce Training Center. Apprenticeship Training - Continuing Education Exam Preparation - Operator Qualifications Electrical Safety Training. Texas. Ohio. New Mexico. www.cwtc-tx.com Construction Workforce Training Center 5308 Andrews highway Odessa, Texas 79762

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Construction Workforce Training Center

Apprenticeship Training - Continuing Education

Exam Preparation - Operator Qualifications

Electrical Safety Training

Texas

Ohio

New Mexico

slide2

www.cwtc-tx.com

Construction Workforce Training Center

5308 Andrews highway

Odessa, Texas 79762

Office: 432 – 366 - 7676

Cell: 432 – 967 - 4280

disclaimer

Construction Workforce Training Center and Dan Dudleywill not be responsible for the interpretation or application of any electrical work in any form by any person, company, agency or organization.

The views expressed in this class are personal views and shall not be considered as a “Formal Interpretation”.

This training class is intended solely to focus attention and awareness on the potential electrical safety issues and various methods to address those hazards. The selection of any particular method is the responsibility of the entity or person selecting the method and any questions should be addressed to the appropriate agency or authority.

The National Electrical Code®, NEC®, NFPA®, NESC® are Registered Trademarks of the National Fire Protection Association, Quincy, MA.

OSHA is the Occupational Safety and Health Administration. This course quotes OSHA regulations however OSHA is in no way associated with this class.

Disclaimer

slide5
Licensed Texas Master Electrician TX # 18163
  • Licensed Unlimited Journeyman Electrician Oklahoma # 104898
  • Over 20 years electrical construction experience
  • Over 12 years teaching electrical courses
  • Craft Training Director / Lead Electrical Instructor
  • TDLR Licensed Continuing Education Provider
  • Electrical Safety Instructor (NEC, NESC, NFPA70E, OSHA)
  • Electrical Exam Preparation Instructor
  • Author of NEER National Electrical Exam Review Software
  • Author and Instructor of Continuing Education Course material

for 18 states

  • Author and Instructor of 18 hour Electrical Exam Preparation

training class approved for 18 hours CE credit in 17 states

  • Director / Lead Electrical Instructor for CWTC, Odessa, TX

a US Dept of Labor and Veterans Admin registered 4 year

Electrical Apprenticeship training program.

TDLR – Texas Department of Licensing & Regulation

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NCCER Certified:
    • Master Trainer (Instructor Trainer)
    • Assessment Administrator (DOT,OQ, and CRAFT)
    • Commercial Electrician
    • Industrial Electrician
    • Instrument Technician
    • Electrical instructor
    • Pipeline Electrical & instrumentation instructor
    • Project Management Instructor
    • Project Supervision Instructor
  • Owner Dan Dudley & Associates
    • Electrical Exam Preparation Training and Software
    • Electrical Safety Training and Performance Evaluations
    • Electrical Continuing Education for License Renewal
  • Electrical Continuing Education for License Renewal
      • Texas, Kentucky, Oklahoma, New Mexico, Utah
      • Ohio, Wyoming, Colorado, Oregon, Montana
      • Washington, Minnesota, North Carolina, North Dakota
      • Iowa, Idaho, Montana, Nebraska

NCCER – National Center for Construction Education and Research

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According to burn centers, if your age and the percentage of burns over your body is equal to or greater than 100 your odds of survival are less than 5%

  • Very PAINFULLY curable
  • NOT CURABLE
electrical hazards
Electrical Hazards
  • Shock
  • Electrocution
  • Fire
  • Arc flash
  • Arc blast
  • Static Electricity

Example of an arcing fault

electrical shock
Electrical Shock
  • Received when current passes through the body
  • Severity of the shock depends on:
    • Path of current through the body
    • Amount of current flowing through the body
    • Length of time the body is in the circuit
  • LOW VOLTAGE DOES NOT MEAN LOW HAZARD
electric arc
Electric Arc

Molten Metal

35,000 °F

Pressure Waves

Sound Waves

Shrapnel

Copper Vapor:

Solid to Vapor

Expands by

67,000 times

Hot Air-Rapid Expansion

Intense Light

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Limited Approach Boundary

  • Nearest an UNQUALIFIED
  • Person can approach
  • Restricted Approach Boundary
  • Must be a QUALIFIED PERSON
  • that understands the hazards
  • Prohibited Approach Boundary
  • Same as contacting ENERGIZED
  • conductors
based upon arc flash potential
Based upon Arc Flash Potential
  • Flash Protection Boundary
    • Based upon the distance at which a 1.2cal (2nd degree) burn could be received
    • Defined as “An approach limit at a distance from exposed live parts within which a person could receive a 2nd degree burn if an electrical arc flash were to occur”.
    • This is NOT THE SAFE BOUNDARY
limits of approach limited approach boundary
Limits of Approach – Limited Approach Boundary

Prohibited

Restricted

Limited

The closest distance an “unqualified” person can approach, unless escorted by a “qualified” person.

Energized panel (<750V)

3 feet 6 inches for 480V

limits of approach restricted approach boundary
Limits of Approach – Restricted Approach Boundary

Prohibited

Restricted

The closest distance to exposed live parts a “qualified” person can approach w/out proper PPE and tools.

To cross this boundary, the qualified person must wear PPE and have proper tools.

Energized part

12 inches for 480 volts

limits of approach shock
Limits of Approach - Shock

Prohibited

Crossed ONLY by a “qualified” person, which when crossed by body part or object, requires the same protection as if direct contact was made with the live part.

Energized part

1 inch for 480 volts

limits of approach flash protection boundary
Limits of Approach – Flash Protection Boundary
  • The distance from exposed live parts within which a person could receive a second degree burn if an arc flash were to occur.
  • Arc flash PPE is required within this boundary.
  • Note: Distance may be less than or greater than the shock protection boundaries.

Flash Protection Boundary

Prohibited

Restricted

Limited

Energized part

Calculated distance

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Hazard Risk Category 3 & 4

Hazard Risk Category 1

Hazard Risk Category 0

Hazard Risk Category 2

Electrical PPE for Arc Flash and Arc Blast

flash hazard analysis and nec 110 16 arc flash label
Flash hazard analysis and NEC 110.16 arc-flash label

NEC® 2008 - 110.16 Flash Protection

Electrical equipment, such as switchboards, panelboards, industrial control panels, meter socket enclosures, and motor control centers, that are in other than dwelling occupancies, and are likely to require examination, adjustment, servicing, or maintenance while energized shall be field marked to warn qualified persons of potential electric arc flash hazards. The marking shall be located so as to be clearly visible to qualified persons before examination, adjustment, servicing, or maintenance of the equipment.

  • FPN No. 1: NFPA 70E-2004, Standard for Electrical Safety in the Workplace, provides assistance in determining severity of potential exposure, planning safe work practices, and selecting personal protective equipment.
  • FPN No. 2: ANSI Z535.4-1998, Product Safety Signs and Labels, provides guidelines for the design of safety signs and labels for application to products.
nec 110 16 arc flash label

WARNING

!

Arc Flash and Shock Hazards

Appropriate PPE Required

Failure to Comply Can Result in Death or Injury

Refer to NFPA 70E

NEC 110.16 ARC-FLASH label

Minimum required marking for 110.16 compliance

nec 110 16 arc flash label with more information

WARNING

!

Arc Flash and Shock Hazards

Appropriate PPE Required

Failure to Comply Can Result in Death or Injury

34 inch

Flash Hazard Boundary

3

cal/cm

Flash Hazard at 18 inches

  • 2

1

Hazard Risk Category 4 cal/cm2 shirt & pants hard hat, safety glasses, FR rated faceshield

480 VAC

Shock Hazard

42 inch

Limited Approach

500V Class 00 gloves, leather protectors

12 inch

Restricted Approach

1 inch

Prohibited Approach

Equipment Name:

XYZ Motor Starter

NEC 110.16 ARC-FLASH labelwith more information

For practical application needs to be feet

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OSHA

Electrical Safety Requirements

nfpa 70e qualified person
NFPA 70E Qualified Person

A qualified person shall be trained and knowledgeable of construction and operation of equipment or work method and trained to recognize and avoid hazard (110.6(D)(1))

  • Familiar with precautionary techniques, personal protective equipment including arc flash, insulating and shielding materials, insulated tools and test equipment
  • Distinguish exposed energized parts from other parts
  • Determine nominal voltage of live parts
  • Understand safe approach distances in Table 130.2C
  • Determine personal protective equipment for task
slide50

Regulations

OSHA GENERAL DUTY CLAUSE

29 USC 654Section 5 (a) (1)

(a) Each employer

(1) shall furnish to each of his employees employment and a place of employment which are free from recognized hazards that are causing or are likely to cause death or serious physical harm to his employees;

(2) shall comply with occupational safety and health standards promulgated under this Act.

(b) Each employee shall comply with occupational safety and health standards and all rules, regulations, and orders issued pursuant to this Act which are applicable to his own actions and conduct.

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