They can vary—a lot. For example, while the EU continues to move toward broader standardization, many different types of outlets still exist from country to country. Some local standards cared about polarization, and some didn’t. It’s similar to other countries around the world.

Generally, you’re less likely to find polarized outlets outside North America. However, alternative plugs and outlets often incorporate precautions so that accidentally touching live prongs on a plug is hard or impossible. You may also find interesting regulations overseas that limit the use of outlets in bathrooms or near sinks to decrease the chance of shock.

Natural gas and electricity rates vary significantly based on location, and pricing can change over time, too. It’s possible that in locations where natural gas is particularly inexpensive, it will cost less than grid-based electricity will. However, you should also factor in the generator’s initial costs and maintenance needs, as well as its noise level and if it can comfortably power all your home appliances.

Knob and tube wiring is old, and its casing is brittle. This means that it's possible to receive a dangerous electrical shock if you touch a live wire and essentially become an electrical pathway. Although the scenario is unlikely, touching any K&T wiring is simply not a good idea in any instance. Leave any wire handling to the professionals.

You should hire a licensed electrician who is insured to perform any electrical work on your home, including lighting installation. States have different requirements for licensing and certifying electricians, so use Angi’s state licensing tool to review local guidelines.

Here are a few questions to ask electricians before hiring:

• How many years of electrical experience do you have?

• Are you licensed, bonded, and insured?

• Do you work with subcontractors?

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

• What is the timeline for completion?

• How do you handle change orders?

• Can you provide at least three customer references?