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unless protected by approved conduit. If the service entrance conduit is a service mast, only two - <br />inch or larger rigid metal conduit or intermediate metal conduit will be used. <br />(13) A minimum of one grounding conductor, sized according to the NEC, will be installed in <br />any field- installed electrical conduit. This requirement is in addition to those prescribed by <br />article 250.64 . <br />(14) Flexible metal conduit (article 348) will not be used in wet locations. <br />(15) Color coding of conductors. Color coding of conductors will be as follows, with the <br />exception of control circuits other than switches: <br />TABLE INSET: <br />Single phase 120/240 volt wiring systems <br />A <br />B <br />N <br />Red <br />Black <br />White <br />TABLE INSET: <br />Three phase four wire 120/208 volt wiring systems <br />A <br />B <br />C <br />N <br />Red <br />Black <br />Blue <br />White <br />TABLE INSET: <br />Three phase three and four wire 120/240 volt delta wiring systems <br />A <br />B <br />C <br />N <br />Red <br />Orange <br />Black <br />White <br />TABLE INSET: <br />277/480 volt or 480 volt delta wiring systems <br />A <br />B <br />C <br />N <br />Brown <br />Yellow <br />Purple <br />Gray/White with 1 or more colored stripes <br />(16) Every light pole ten feet above adjacent grade shall have an eight -foot ground rod. <br />(17) Labeling: <br />a. Meter sockets shall be labeled with the business address, house number, apartment <br />number, lot number or duplex number of the unit to which the meter socket is connected. <br />b. At the time of final inspection, the meter sockets shall be labeled with permanent <br />labels that are of such a quality that the readability of the labels will not be affected by <br />