Journeyman Electrician Practice Exam

Which wiring method is also permitted for use in feeder or branch circuits where flexibility is required in artificially made bodies of water?

1. Type AC cable

2. Type MC cable

3. Extra-hard usage portable power cable

4. Type NM cable

The correct answer is: Extra-hard usage portable power cable

The correct option pertains to the use of extra-hard usage portable power cable, which is specifically designed to withstand harsh environments and any mechanical stress that may be encountered. In the context of artificial bodies of water, such as pools, spas, and fountains, equipment may require flexibility for movement while also needing protection against moisture and other environmental factors. Extra-hard usage portable power cable offers that flexibility and durability, making it suitable for feeder or branch circuits in such settings. Additionally, it's important to note that while other types of cable, like Type AC or Type MC, might be suitable in various electrical applications, they may not provide the same level of flexibility and durability as the extra-hard usage portable power cable. Type NM cable is typically used in dry locations and residential applications, making it less suitable for environments where there is water present. Therefore, the unique attributes of extra-hard usage portable power cable are crucial for ensuring safety and compliance in wet locations.