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It can be safe to buy or live in a house with knob and tube (K&T) wiring, but only if the system is in good condition, functional, and has been thoroughly inspected and approved by a licensed electrician. Never purchase a home with K&T wiring without getting a professional electrical inspection first.

Key considerations include:

• Safety and Condition: An inspector will verify that the wiring is safe and has not deteriorated. Over time, the insulation can wear away, leaving exposed wires that pose a significant fire or shock hazard.

• System Capacity: The electrical service should be at least 60 amps. However, even at this capacity, K&T systems often struggle to handle the demands of modern appliances and electronics.

• Lack of Grounding: Knob and tube wiring is an ungrounded system, which is a safety concern for many modern devices.

• Ongoing Maintenance: If you live in a home with K&T wiring, it's recommended to have it inspected by an electrician every one to two years to ensure it remains in safe working order.

Ultimately, any inspection or modification of a knob and tube system should always be performed by a certified professional.

Call your utility company immediately. Do not go outside, even in your own yard, and keep pets indoors. Downed power lines pose a serious electrocution hazard. They can also cause large power surges that could damage your appliances, so it’s a good idea to shut down power to your home if possible. If your breakers trip, leave them off until the utility company finishes its repair work.

It’s important to ask an electrician a few questions before you commit to hiring them so you can make an informed decision as a consumer. If you’re getting estimates or considering hiring an electrician, ask them these questions:

• Are you a full-time electrician?

• Are you bonded, licensed, and insured?

• What level of experience do you have as an electrician?

• Can you please share three references?

• Do you do residential or commercial electrical work?

• What kinds of electrical work are you most familiar with?

• Will any subcontractors be performing the work?

• Are permits and inspections required?

• Who is responsible for obtaining permits and inspections?

• What is your schedule?

• Do you offer a guarantee or warranty on your work?

• Will you sign a do-not-exceed clause to keep the job within the budget?

Rewiring projects cost anywhere between $1,500 and $10,000 on average, depending on the complexity and the size of the rewiring. You can anticipate spending between $2 and $4 per square foot of wire, including labor and materials. Wire material ranges from $0.25 to $1.60 per linear foot.