What is in this article?:
- What's Wrong Here?
- Find the Answer
Hint: Is this a new type of splice box?
Find the Answer
Sam Terranova of JLT Electrical Construction in Schaumburg, Ill., found this installation in the front lawn area of a commercial office building. He noted that the wires were spliced in this mini LB, and the cover was missing.
This installation violates the requirements of 314.16(C) of the 2005 NEC, which provides guidelines on the installation of conductors in conduit bodies. Parts (1) and (2) of this section read as follows:
”Conduit bodies enclosing 6 AWG conductors or smaller, other than short-radius conduit bodies as described in 314.5, shall have a cross-sectional area not less than twice the cross-sectional area of the largest conduit or tubing to which it is attached. The maximum number of conductors permitted shall be the maximum number permitted by Table 1 of Chapter 9 for the conduit or tubing to which it is attached.”
”Only those conduit bodies that are durably and legibly marked by the manufacturer with their volume shall be permitted to contain splices, taps, or devices. The maximum number of conductors shall be calculated in accordance with 314.16(B). Conduit bodies shall be supported in a rigid and secure manner.”