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What should be observed on aluminum service entrance cables to prevent corrosion?

  1. Silicone sealant

  2. PVC insulation

  3. Antioxidant paste

  4. Copper grounding wire

The correct answer is: Antioxidant paste

Aluminum service entrance cables are known to be susceptible to corrosion, particularly when exposed to moisture and various environmental conditions. To combat this issue, the application of antioxidant paste is a key preventative measure. This paste serves as a protective barrier, minimizing the risk of corrosion by inhibiting the oxidation of the aluminum. When aluminum is exposed to air, it can develop an oxide layer, which could potentially affect the conductivity of the cable connections. The antioxidant paste helps maintain a good electrical connection while protecting against corrosion throughout the lifespan of the cables. While each of the other options plays a role in certain aspects of electrical installation and safety, they do not specifically address the corrosion prevention needs associated with aluminum service entrance cables like antioxidant paste does.