What type of washers are used when attaching a line to the grounding bar?

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Multiple Choice

What type of washers are used when attaching a line to the grounding bar?

Explanation:
Attaching a line to the grounding bar needs a connection that stays tight and conducts well over time. A flat washer spreads the load and protects the surface of the grounding bar and conductor, giving a stable, clean contact area. A lock washer helps prevent the connection from loosening due to vibration or thermal cycling by biting into the metal and locking the bolt in place. Using both types ensures a strong, low-resistance ground path that remains secure, which is why this combination is the best approach. Using only one type or none can lead to loosening, poor contact, or damage over time.

Attaching a line to the grounding bar needs a connection that stays tight and conducts well over time. A flat washer spreads the load and protects the surface of the grounding bar and conductor, giving a stable, clean contact area. A lock washer helps prevent the connection from loosening due to vibration or thermal cycling by biting into the metal and locking the bolt in place. Using both types ensures a strong, low-resistance ground path that remains secure, which is why this combination is the best approach. Using only one type or none can lead to loosening, poor contact, or damage over time.

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