Which type of solder should be used for wiring repairs?

Rosin core solder is specifically designed for electrical applications and wiring repairs. Its internal rosin flux helps ensure a strong and clean bond by preventing oxidation during the soldering process, which is critical for effective electrical connections. The rosin flux is non-corrosive and is well-suited for electrical work, as it provides adequate cleaning action without leaving harmful residues that could impair electrical conductivity or cause deterioration over time.

While lead-free solder is an environmentally friendly option and may be used in various soldering contexts, it may require higher temperatures and can be more challenging to work with compared to traditional rosin core solder. Acid core solder, on the other hand, is primarily intended for plumbing and metalwork and can be corrosive, which makes it unsuitable for electrical wiring repairs due to the risk of damaging the wire insulation and connections. Flux-core solder is more generic and may not specifically meet the requirements for electrical connections in the same way that rosin core solder does. Thus, rosin core solder is the preferred choice for wiring repairs, ensuring connections are secure and reliable.