What is a recommended action when extending a circuit from one receptacle to another in old houses?

When extending a circuit from one receptacle to another in old houses, recommending to consult a certified electrician is important because older wiring may not comply with current electrical codes or safety standards. A certified electrician has the expertise to assess the existing wiring condition and determine the safest way to extend the circuit. They can identify potential issues such as outdated materials or insufficient capacity that could pose a fire hazard or lead to equipment malfunctions.

Using a new cable without changes does not account for the potential incompatibilities with the existing system, which might lead to unsafe conditions. Changing the existing wiring may also be necessary, but it's best done under the guidance of a professional to ensure correct installation and compliance with electrical codes. Consulting a certified electrician ensures that the work is done safely and correctly, making this the recommended action.