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Rewiring a residential electrical wiring with an outdated or undersized wiring system will keep you safer, prevent annoyances such as flicking lights, and even save you money on electric bills. whole house rewiring is a major undertaking, though, and it requires planning and patience.

This article covers the different steps and considerations you need to successfully rewire your home. We’ll dive into everything from amp needs to budget-setting tips to help you get the job done right.

electric wiring usually involves more than just replacing old wire. If your electrical panel (breaker box) is undersized, replacing it with a larger one will let you use more electronics and appliances at once.

Before 1965, many homes were built with 60-amp panels, which were enough for a time when families used less electricity. Even if you feel you can make do with that much, chances are you’ll need to upgrade your service to qualify for homeowner’s insurance. A 60-amp panel isn’t inherently unsafe if used correctly, and even today it’s enough for a very small house. In more typically sized homes, however, modern users tend to overload these panels, which presents a fire hazard.

Almost all modern homes are built with 100-amp, 150-amps or 200-amp panels. The most common electrical panels are 100- and 200-amp models. A 100-amp panel is enough for most homes of 3000 sq. ft. or less. If you have a larger house or you use energy-hungry appliances such as an electric water heater or a hot tub, it’s usually more cost-effective to go for the 200-amp panel.

On the other hand, if your house was wired in the 1980s or later, chances are only a few upgrades will be needed to replace worn or damaged wiring and fixtures.

You might also want to replace old sockets, light fixtures, and light switches. Old round switches and sockets installed in skirting without skirting trunking should be upgraded for safety reasons. What you can install depends on the existing socket or fixture’s fitting requirements, so make sure you know before you buy replacements. Consider modern options such as sockets with USB ports and alternatives such as push-button light switches instead of toggle designs.

Once the work has started, asking for changes adds to the time and cost of the job. What looks like a simple change to you might actually require some complex wiring.