If an inhibitor compound is not used in a conductor splice, what is a potential risk?

• A. Increased oxidation and corrosion at the contact area
• B. Improved conductivity
• C. No risk
• D. Reduced contact area

Answer: (A)

In a conductor splice, keeping the metal surfaces free from oxidation and corrosion is essential for a solid, low-resistance electrical connection. An inhibitor compound helps prevent chemical reactions at the contact interface that can form oxide or other corrosion products.

If an inhibitor isn’t used, exposed metal at the splice can oxidize and corrode due to moisture, salts, and environmental contaminants. Those oxide films or corrosion products increase the contact resistance, can trap heat, and may lead to a loose or unreliable connection under load. That’s the key risk: oxidation and corrosion at the contact area.

Improved conductivity wouldn’t come from skipping the inhibitor—in fact, the opposite is true, since oxide layers typically reduce conductivity. The option of no risk isn’t accurate because corrosion is a known concern in splices. Reduced contact area can occur as corrosion progresses, but the fundamental issue driving the risk here is the oxidation and corrosion at the contact surface.