Master Electrician Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Enhance your knowledge for the Master Electrician Test with multiple choice questions and detailed explanations. Prepare efficiently with our quiz and boost your confidence for the exam day!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What is the minimum size equipment bonding jumper for receptacles on a 20-ampere branch circuit in a critical care area?

12 AWG
10 AWG
14 AWG
8 AWG

The correct answer is: 10 AWG

The correct answer is based on the National Electrical Code (NEC) requirements for equipment bonding jumpers in specific applications, such as critical care areas. For a 20-ampere branch circuit, the minimum size for the equipment bonding jumper must consider the allowable overcurrent protection and the potential fault current it may need to carry. In critical care areas, where electrical safety is paramount, the NEC stipulates that a bonding jumper should be able to safely conduct any fault current that may occur, ensuring that all metal parts remain at the same electrical potential and preventing electric shock hazards. For a 20-ampere circuit, the code requires that the minimum size bonding jumper is generally determined based on the largest overcurrent protection for the circuit. In this case, a 10 AWG bonding jumper is specified as meeting the requirement for a 20 amp circuit, particularly due to the increased safety standards in critical care environments where equipment reliability and health safety are essential. This attention to detail in bonding sizes helps ensure that any potential faults in the electrical system can be safely carried away, helping to protect both patients and medical equipment in critical care settings. Other choices may not comply with the NEC standards set forth for these sensitive areas.