Ground rods must be at least ________ feet long.

a. 6
b. 8
c. 10
d. 12


b. 8

Trades & Technology

You might also like to view...

As a consumer's disposable income rises, the proportion of income spent on food falls. This assertion is known as ________.

Fill in the blank(s) with the appropriate word(s).

Trades & Technology

Footlights in a stage that are designed to disappear into a storage recess when not in use must be designed so that _____.

a. their external temperature cannot exceed 125°F (51.6°C) b. the power supply is automatically disconnected when the lights are retracted c. no flammable materials are within 12 inches (30.5 cm) d. their wattage is automatically reduced when the lights are retr

Trades & Technology

Which of the following is true with regard to circuit breaker interrupting capacity ratings?

a. NEMA tests are certified by unbiased reviewers. b. UL tests now include NEMA ratings. c. The interrupting capacity of a circuit breaker is the same for all voltage levels. d. UL tests are self-certification.

Trades & Technology

Which of the following is the primary purpose of external audits?

a. Prepare financial documents and reports b. Examine the efficiency and appropriateness of the firm's financial and accounting procedures c. Verify the accuracy of the methods used to prepare financial documents d. Provide managers with information for improving the profitability of the firm's operations

Trades & Technology