🔍 Key Concepts

• Proper maintenance of electrical contacts on motor controllers • Difference between abrasive cleaning vs. non-abrasive cleaning of contacts • Effects of removing metal from contacts versus removing dirt/oxidation

💭 Think About

• Which methods actually remove metal from the contact surface, and why might that be a problem over time? • Which method would best remove loose dust or light oxidation without changing the shape or size of the contacts? • In normal "routine" maintenance (not repair of badly pitted contacts), what is the safest way to extend contact life?

✅ Before You Answer

• Identify which choice(s) are abrasive enough to change contact shape or remove significant metal • Consider which method could drive debris deeper into the mechanism rather than safely removing it • Confirm which method aligns with manufacturer guidance for routine (not heavy repair) cleaning of electrical contacts