Wrenches, We have a string of batteries being inspected by a local AHJ. In plan-check comments, I was asked to ensure that the flexible cable was UL-listed, so we made sure of this when it came from the suppliers. We used 4/0 RHW-2. Now our inspector is asking if "RHW-2 is fine-stranded in Article 400 of the NEC as required by 690.74?"
Article 400 doesn't explicitly define any cable types for use in battery systems, and the one general disclaimer is in 400.4: "Types of flexible cords and flexible cables other than those listed in the table shall be the subject of special investigation". Has anyone had a similar request before? Anyone done a "special investigation" on cables, and have results to share? Any other thoughts? Thanks for any help, -Phil Real Goods Solar
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