Frequently Asked Questions (FAQs)
6. Your Burning Electrical Questions Answered
Here are some common questions that people usually have about electrical breakers and wattage capacities. Hopefully, these questions clarify some of the doubts you might still have.
Q: What happens if I continuously run 4000 watts on a 20 amp breaker connected to a 120 volt circuit?
A: Well, as a practical matter, you can't. A 20 amp breaker on a 120v circuit only has a capacity of 2400 watts. As discussed, though, you should only continuously run 1920 watts on that circuit. If you could, you would almost certainly trip the breaker quickly due to overload. If the breaker is faulty or old, it might not trip, which could cause the wires to overheat, posing a significant fire hazard.
Q: Can I replace a 20 amp breaker with a 30 amp breaker to handle more power?
A: Absolutely not! This is a very dangerous idea. The wiring connected to that breaker is designed for a maximum of 20 amps. Replacing it with a higher-rated breaker allows more current to flow through the wires than they can safely handle, leading to overheating and potentially causing a fire. Never, ever upsize a breaker without consulting a qualified electrician and upgrading the wiring accordingly.
Q: How do I find out the wattage of my appliances?
A: The wattage rating is typically printed on a label located on the appliance itself. Look for a sticker or plate on the back, bottom, or side of the appliance. If the label only shows amps and volts, you can calculate the wattage by multiplying them (Watts = Volts x Amps). If you can't find a label, consult the appliance's manual or the manufacturer's website.
