SN from Co Dublin, asks: ‘Given the increasing incidence of winter storms, is there any issue with driving an electric car through a flood?’
As winter storms become more frequent, flood risks increase for drivers. Concerns about vehicle safety are common, especially with electric cars. This article explores whether EVs are safe to drive through flood waters and offers essential tips to ensure safety.
The Flood-Resistant Advantage of Electric Cars
Electric vehicles offer a significant advantage over traditional petrol and diesel cars when it comes to dealing with flood water. The key lies in the absence of air intake systems, which are crucial in internal combustion engines but irrelevant in EVs.
A Cautionary Tale: Rufford Ford
The Rufford Ford in Nottinghamshire, England, once served as a stark reminder of the risks associated with driving through floods. As the water levels rose, many drivers attempted to cross, often charging recklessly through the ford with expensive consequences.
Most cars can handle about 300mm of standing water, provided they are driven with caution. The technique involves starting the engine at high RPM in a low gear to create pressure in the exhaust, preventing water from entering and causing hydro-locking. Slow, steady progress helps manage the wave created by the vehicle.
The Hydro-Locking Dilemma
Hydro-locking occurs when water enters a petrol or diesel engine’s cylinders, seizing the engine. This is typically the result of unsuspecting drivers pushing through water too rapidly, allowing water to enter the air intake. Hydro-locking often results in a costly engine repair or replacement.
In contrast, electric cars are immune to hydro-locking due to the absence of air intake systems. Their batteries and electric motors are sealed against water, making them more resilient to flood conditions, as long as they are driven carefully and follow flood-driving guidelines.
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EV Charging and Safety
The safety of electric cars extends beyond driving. Charging points for EVs are designed to be water-resistant, ensuring that charging in the rain is generally safe. However, some public charging points now feature small canopies for added protection from harsh weather.
Home Charging Precautions
Home charging stations, however, require more caution. The use of indoor extension cords for charging is a significant risk, particularly in wet conditions. The high heat generated during charging can damage the cable and socket, and the danger is magnified when exposed to water.
The safest practice is to avoid using extension cords indoors. Instead, consider upgrading or installing a dedicated charger. If an extension cord is necessary, ensure it is rated for outdoor use in wet environments.
Rufford Ford: A Closed Case
The Rufford Ford’s notoriety provided a tragic lesson in flood driving. A motorcyclist’s attempt to speed through the water resulted in serious injury, leading to the closure of the ford. This incident underscores the importance of caution and adherence to safety guidelines.
Conclusion: Driving Safely Through Floods
While electric cars offer a safer alternative to traditional vehicles when it comes to driving through flood waters, safety remains paramount. Always check the water depth, use low gear and high RPM to maintain exhaust pressure, and drive slowly and steadily. Adhering to these precautions can help prevent costly repairs and ensure your vehicle remains safe.
By understanding the unique advantages and considerations of driving electric cars through floods, motorists can make informed decisions and prioritize safety during adverse weather conditions.
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