What is the consequence of connecting a generator directly to household wiring?

Connecting a generator directly to household wiring can result in dangerous back-feeding into the power grid. This phenomenon occurs when the generator supplies power not just to the home but inadvertently also sends electricity back into the utility lines. This back-feed poses a significant hazard as it can energize power lines that utility workers are working on, leading to potential injuries or fatalities.

Moreover, back-feeding can cause complications and damage to both the generator and the power grid, disrupting normal operations and potentially damaging infrastructure. To prevent these risks, it is crucial to use proper transfer switches that isolate the household wiring from the grid when the generator is in use. This ensures that all electrical systems are safe and functional while minimizing any hazards to utility personnel and equipment.

While the other options touch on potential issues or concerns, they do not encapsulate the critical danger posed by incorrect connections, making the risk of back-feeding the most pressing consequence in this context.