The 2017 requirement for field marking of available fault current at service equipment rated 1,200A or more, installed in other than dwelling units, now includes which additional piece of information?
A) the date the fault-current calculation was performed
B) the field marking shall be of sufficient durability to withstand the environment involved
C) the field marking shall be legibly marked in the field with the maximum fault current
D) the calculation shall documented and made available to those authorized to design, install inspect, maintain, or operate the system
Find the Answer
Answer: D
Section 110.24(A) of the 2017 NEC has added an additional requirement for the available fault-current calculation to be documented and made available to those authorized to design, install inspect, maintain, or operate the system.
Owen is the owner and president of National Code Seminars and the holder of master electrician certifications in 46 states. He can be reached at [email protected].
