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That depends on your setup. If a circuit breaker already has GFCI protection, then everything connected to that specific circuit is being monitored. You don’t need additional GFCI outlets on that breaker.

However, if the breaker is not GFCI, then you should have GFCI receptacles for at-risk outlets nearby water sources, because they are not receiving protection. Breakers in a breaker box can vary between GFCI and non-GFCI. Look for GFCI labels on the breaker or try to find the breaker model number to look it up if you aren’t sure.

The cost to install or replace a circuit breaker depends on the price of the unit itself and the complexity of the installation. A new circuit breaker typically costs between $10 and $100, with standard breakers being the most affordable and GFCI or AFCI types costing more. If you are upgrading to a higher amperage, a 200-amp circuit breaker can cost between $250 and $350. The average total cost for professional installation is around $700, but this price varies. A simple replacement into existing wiring will cost less than a more complex project that requires opening walls, running new wires, and securing permits.

Often, simply looking at a Christmas light fuse will reveal whether it’s blown or not. Dark staining inside the glass that looks like a burn mark means the fuse has blown. If a burn mark isn’t evident, visually inspect the fuse for an intact filament inside. The fuse is no longer usable if the filament is broken or appears non-existent.  

GFCI stands for ground fault circuit interrupter, which means it has the ability to detect a ground fault and shut the circuit down before it creates hazards. General breakers may also do that because ground faults can cause overloads, but they’re more focused on amp overloads from any cause. GFCIs are often installed in specific outlets, but breakers can come with GFCI capabilities built in for broader ground fault protection.