What tool is commonly used to clean conductors before splicing?

The tool commonly used to clean conductors before splicing is a wire brush. A wire brush is effective at removing oxidation, corrosion, and dirt from metal surfaces, which is critical for ensuring a good electrical connection when splicing wire. Proper cleaning of conductors helps to minimize resistance and improve the overall performance and safety of the splice. The bristles of a wire brush can reach into small crevices and grooves that other cleaning tools may not effectively clean.

While sandpaper can also be used for cleaning, it may not be as efficient for this specific purpose because it can leave a residue or particles that may affect the connection. A cloth is typically used for wiping down surfaces but may not provide the necessary abrasiveness to remove tough contaminants effectively. Spray cleaners can assist in cleaning by dissolving grime but would typically be used in conjunction with a brush to ensure that all residues are thoroughly removed.