Situation: 13.8KV pri has 4 6" flexed feeds into compartment. They are LFMC. It has been requested to change the flex to rigid, very labor intensive and costly.
Ok, this question is about the code saying that the maximum size of Flexible Metalic Conduit or Liquidtite is 4".
Why is this, Sealtite Anaconda or whoever the mnfr is, makes 5" and 6". I called the mfr and they said some applications use 5-6" like substations.
If you go to Enforcement in the front of the book, 90.2B to me says that a substation may not be covered under the NEC and 90.4 says that by special permission, the authority having jurisdiction may waive specific requirements in the code as long as safety is maintained.
Note, our facility is DOT regulated.
The transformers are already running,
I appreciate your comments and hope we all learn something of this.
The UL should just go ahead and approve 5 and 6" flexible conduit.
Ok, this question is about the code saying that the maximum size of Flexible Metalic Conduit or Liquidtite is 4".
Why is this, Sealtite Anaconda or whoever the mnfr is, makes 5" and 6". I called the mfr and they said some applications use 5-6" like substations.
If you go to Enforcement in the front of the book, 90.2B to me says that a substation may not be covered under the NEC and 90.4 says that by special permission, the authority having jurisdiction may waive specific requirements in the code as long as safety is maintained.
Note, our facility is DOT regulated.
The transformers are already running,
I appreciate your comments and hope we all learn something of this.
The UL should just go ahead and approve 5 and 6" flexible conduit.
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