Fill in the blank.
The 2017 NEC requirement for arc-flash hazard warning for service equipment installed in other than dwelling units now includes additional information, such as __________.
A) nominal voltage
B) available fault current at the service overcurrent protective devices
C) the clearing time of the service overcurrent protective device based on the available fault current at the service equipment
D) the date the label was applied
E) all of the above
Find the Answer
Answer: E
As noted in Sec. 110.16(B) of the 2017 NEC, “In other than dwelling units, in addition to the requirements in (A), a permanent label shall be field or factory applied to service equipment rated 1,200A or more. The label shall meet the requirements of 110.21(B) and contain the following information:
“(1) Nominal system voltage
“(2) Available fault current at the service overcurrent protective devices
“(3) The clearing time of service overcurrent protective devices based on the available fault current at the service equipment
“(4) The date the label was applied”
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].
