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Chapter 3

Chapter 3. Electrical Safety. Electrical Safety • Personal Protective Equipment • Lockout/Tagout • Lockout Devices • Fire Safety • Confined Spaces • Overhead Power Line Safety. Article 430 of the NEC ® covers requirements for motors, motor circuits, and controllers.

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Chapter 3

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  1. Chapter 3 Electrical Safety Electrical Safety • Personal Protective Equipment • Lockout/Tagout • Lockout Devices • Fire Safety • Confined Spaces • Overhead Power Line Safety

  2. Article 430 of the NEC® covers requirements for motors, motor circuits, and controllers.

  3. Safety labels are used to indicate a situation with different degrees of likelihood of death or injury to personnel.

  4. Electrical shock is a condition that results any time a body becomes part of an electrical circuit.

  5. Grounding provides a direct path for unwanted (fault) current to the earth without causing harm to individuals or equipment.

  6. A GFCI compares the amount of current in the ungrounded (hot) conductor with the amount of current in the neutral conductors.

  7. When taking measurements in an electrical circuit, transient voltages can cause electrical shock and/or damage to equipment.

  8. The applications in which a DMM may be used are classified by the IEC 1010 standard into four overvoltage installation categories.

  9. Motor guards are used for protection from rotating parts of a motor or anything connected to the motor.

  10. Personal protective equipment is used to reduce the possibility of an injury.

  11. Per NFPA 70E, the type of PPE required depends on the voltage and where work is being performed.

  12. The approach boundary is the distance at which PPE is required while working on energized circuits to prevent burns if an arc occurs.

  13. Eye protection must be worn to prevent eye or face injuries caused by flying particles, contact arcing, or radiant energy.

  14. Hand protection includes gloves worn to prevent injuries to hands caused by cuts or electrical shock.

  15. Knee pads are used to provide protection and comfort to technicians who spend considerable time on their knees.

  16. Rubber insulating matting provides protection from electrical shock when working on live electrical circuits.

  17. Equipment must be locked out and/or tagged out before installation, preventive maintenance, or servicing is performed.

  18. Lockout devices are available in various shapes and sizes that allow for the lockout of standard control devices.

  19. Lockout/tagout kits comply with OSHA lockout/tagout standards.

  20. An oily waste can seals out oxygen to prevent spontaneous combustion.

  21. Fire extinguisher classes are based on the combustibility of the material.

  22. Article 500 of the NEC® covers hazardous locations.

  23. An energized electrical work permit documents all electrical work performed on the premises.

  24. Oxygen-deficient atmospheres in confined spaces can cause life-threatening conditions.

  25. For maximum safety, procedures for entering a confined space must follow established OSHA standards.

  26. Confined space entry permit forms document preparations, procedures, and required equipment.

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