When were 2 prong outlets used?

## When were 2 prong outlets used?

### Answer:

2 prong outlets were commonly used in the early to mid 20th century, before the widespread adoption of 3 prong outlets with grounding capabilities.

### Explanation:

1. 2 prong outlets were popular in the United States during the 1920s through the 1960s.

2. These outlets were designed to provide electricity to appliances and devices using only two slots for the plug.

3. However, 2 prong outlets lacked a grounding wire, which meant that they did not provide the same level of safety as modern 3 prong outlets.

4. Over time, as electrical safety standards improved, 3 prong outlets with an additional grounding slot became the norm.

5. The third prong in these outlets allows for excess electricity to safely discharge into the ground, reducing the risk of electrical shock or fire.

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