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Yes, electricians must be licensed, certified, and in most cases, insured. Licensing requirements vary by state and local municipality, but most U.S. municipalities require electricians to hold an electrical contractor’s license. It's always a good practice to confirm requirements with your local municipality. Even if licensing is not required in your area, hiring a licensed and experienced electrician often leads to a better end result.

A license is a legal requirement to operate a business and is necessary for pulling project permits. Certifications, on the other hand, are typically voluntary and demonstrate a certain level of expertise. In some cases, a certified electrician may send an apprentice or journeyman to perform the work, but they must operate under a primary electrician who holds the proper license.

Before hiring, you should verify the electrician's license, insurance coverage, and any third-party certifications. You can use Angi’s contractor licensing search to confirm a pro's license status. Additionally, businesses with the “Angi Approved” badge on our platform meet strict criteria, including having the required state and local licenses, passing a background check, and maintaining a high average rating.

Ultimately, the best device depends on what you’re measuring. A voltmeter only measures volts, while a multimeter measures volts, current, resistance, humidity, and possibly much more, depending on the model. If you think you’ll need to measure more than volts, consider investing in a multimeter so you have a tool that can help you with various household projects.

Aluminum wiring can pose a fire risk as it can overheat, expand, and contract, leading to failing splices and loose connections. If your home has aluminum wiring, it requires careful maintenance and potential safety upgrades. The first step is to hire a licensed electrician to conduct a thorough inspection.

A complete replacement with copper wire is the safest option but can be very expensive and is not always necessary. Other safety measures and upgrades include:

• Copper Pigtailing: A more budget-friendly option where a short section of copper wire is added to each end of the aluminum wire. This is only appropriate for certain homes.

• Aluminum-Compatible Outlets: Installing outlets specifically designed for use with aluminum wiring.

• Anti-Oxidant Paste: Applying this paste to connections to prevent oxidation.

Consulting with a qualified electrician is essential to assess the condition of your wiring and determine the most appropriate updates to meet current safety standards.

No. Blue wires and black wires are different. Even though both are used as hot wires, they serve different functions. Black wires are far more common in residential properties. They are always hot, can be positive or negative, and usually carry electricity from a power source to an outlet. Blue wires have a specialized usage in residential properties, generally as traveler wires, and are more common in commercial properties.