This panel transfers electrical power from the main outside power lines to the home's system. Most electrical panels have 200-, 300-, or 400-amp capacities and enough room for up to 84 circuits.

More than half of single-family homes in the U.S. were built before 1980, a time when people used far fewer electric devices and a 100-amp electrical panel was enough to handle the load.

Trenching, or burying the electrical wire that comes from the electrical panel, can cost $600 to $2,100. If the drywall is damaged during wiring installation, it can cost $1.50 to $3 per square ...

A heavy upgrade from a 100-amp electrical service is often recommended when installing central air, and it can be a good idea, even if not absolutely necessary. Many houses with 100-amp services ...

If you're buying a home with a fused electric service, you would do well to have the service upgraded. A typical service upgrade from a fuse panel to a breaker panel will be in the $1500 - $2000 ...