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Yes, wires are still hot, even if the light switch is off. The only way to ensure the wire is no longer live and that you can work with it safely is to open your circuit breaker, locate the breaker for the outlet you’re working with, and turn off the breaker for that outlet.

The National Electrical Codebook indicates that there should be at least 6 inches of wiring in the breaker box for connecting purposes. When in doubt, err on the side more, because you can always cut some wire off but you can never add it back on, and if you don’t have enough you may struggle to finish wiring your breaker box properly.

Knowing if and when your circuit breaker is failing or faulty can prevent costly damage. If you notice any of the following signs, call a local electrician to help. 

• The breaker frequently trips

• The breaker doesn't stay in the 'on' position or reset properly

• You hear buzzing or humming noises coming from the breaker

• There's discoloration around the breaker switch

• There's a burning smell or visible signs of damage on the breaker

Hiring a professional electrician to wire a house costs anywhere from $1,500 to $10,000 or more depending on the size and complexity of the project. Most professional electricians charge $50 to $100 per hour. While the extra expense is significant, it’s worth it to ensure the safety of your home’s electrical system.