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EV Safety Chapter 1

Summary Outline:

  1. Introduction to EV Safety:
    • Importance of understanding high-voltage systems (600+ volts) compared to standard household electricity (110 volts).
    • Personal experience with electrocution highlighting the necessity of safety precautions.
  2. Identifying Hybrid and EV Vehicles:
    1. Recognizing vehicle types through badging (e.g., “Hybrid,” “Eco,” “E-Tron”) and visual indicators like orange cables, charging ports, and dashboard symbols.
    2. Key vehicle classifications: ICE, BEV, HEV, PHEV, and F-Cell.
  3. Safety Symbols and Guidelines:
    1. Understanding common safety symbols like danger of electrical shock, do not switch on high voltage, and restricted access signs.
    2. mportance of displaying warning signs and cordoning off areas during high-voltage service.
  4. Electrical Safety Basics:
    • Human body as a conductor and factors affecting electric shock severity (e.g., skin resistance, current magnitude).
    • Voltage and wire color classification: low voltage (red/black), intermediate (blue/green), high voltage (orange).
  5.  Current Flow and Risks:
    • Explanation of the “no-let-go” threshold (10-40 milliamps) and the dangers of grabbing an electrocuted person.
    • First aid for electrocution and critical time windows for survival.
  6. Equipment Safety Ratings (CAT Ratings):
    • Importance of using CAT III meters for high-voltage systems in EVs and hybrids.
    • Explanation of CAT I-IV ratings and their appropriate applications.
  7. Proper Use of Testing Equipment:
    • Safety practices like verifying multimeters before use and using differential probes to prevent ground loops.
    • Importance of using the “one-hand method” to reduce electrocution risk