HOLT Electricians Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

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What type of attachment plug is recommended for portable lamps?

Standard type

Polarized type

The polarized type of attachment plug is recommended for portable lamps because it enhances safety by ensuring that the electrical connection is made correctly. Polarized plugs have one blade that is wider than the other, which means they can only be inserted into the outlet in one direction. This design helps to ensure that the live (hot) wire connects to the lamp's switch, while the neutral wire connects to the lamp's socket. This arrangement minimizes the risk of electrical shock by reducing the likelihood of the lamp being energized when it is in the off position.

Using a polarized plug also minimizes the risk of short circuits and helps to protect the user from potential electrical hazards. Ensuring that devices like lamps are correctly powered reduces the chance of overheating and damage, contributing to safer home environments. Other types of plugs may not provide the same level of safety features that polarized plugs do.

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Universal type

High-voltage type

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