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.
Identifying Hybrid and EV Vehicles:
Recognizing vehicle types through badging (e.g., “Hybrid,” “Eco,” “E-Tron”) and visual indicators like orange cables, charging ports, and dashboard symbols.
Key vehicle classifications: ICE, BEV, HEV, PHEV, and F-Cell.
Safety Symbols and Guidelines:
Understanding common safety symbols like danger of electrical shock, do not switch on high voltage, and restricted access signs.
mportance of displaying warning signs and cordoning off areas during high-voltage service.
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).
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.
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.
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