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A service entrance utilizes PVC conduit but there are two 90's and metal rather than PVC 90's are used. In many installations this is used to prevent the scoring of the inside of the PVC conduit as the wire passes through the bends. What conditions must be met to allow the use of the metal 90's in a PVC service entrance?
Be sure and include your code book sections to backup your answer!
Since the question deals with service conduits, the answer to this question can be found in Section 250.80.
Exception which relaxes the requirement to ground the metal elbow in such installations that are isolated from possible contact by a minimum cover of not less than 18 inches to any part of the metal component (90-degree elbow in this case).
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