NM CID EL-1 Practice Questions - New Mexico CID EL-1 Electrical Distribution Systems, Including Transmission Lines Examination Exam

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NESC 2007 Rule 261 requires wood structures to meet different strength factors for Grade B and Grade C. The practical result is that a Grade B crossing structure, compared with a Grade C tangent structure on the same line, must:

be allowed to fail at a lower load because crossings are shorter have higher required strength (a larger pole class, more guys, or both) for the same weather load case ignore ice and wind because trains provide shielding use only Class 10 poles

Correct Answer:

have higher required strength (a larger pole class, more guys, or both) for the same weather load case

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