GROUNDED CONDUCTORS

70-33 means permitted by Section 400-22, shall be permitted whether or not the outlet to which it is connected is supplied by a circuit having a grounded conductor. Exception No. 4: A white or natural gray conductor of circuits of less than 50 volts shall be required to be grounded only as required by Section 250-5(a). 200-9. Means of Identification of Terminals. The identification of terminals to which a grounded conductor is to be connected shall be substantially white in color. The identification of other terminals shall be of a readily distinguishable different color. Exception: Where the conditions of maintenance and supervision assure that only qualified persons will service the installations, terminals for grounded conductors shall be permitted to be permanently identified at the time of installation by a distinctive white marking or other equally effective means. 200-10. Identification of Terminals. (a) Device Terminals. All devices provided with terminals for the attachment of conductors and intended for connection to more than one side of the circuit shall have terminals properly marked for identification. Exception No. 1: Where the electrical connection of a terminal intended to be connected to the grounded conductor is clearly evident. Exception No. 2: The terminals of lighting and appliance branch-circuit panelboards. Exception No. 3: Devices having a normal current rating of over 30 amperes other than polarized attachment plugs and polarized receptacles for attachment plugs as required in Section 200-10(b). (b) Receptacles, Plugs, and Connectors. Receptacles, polarized attachment plugs and cord connectors for plugs and polarized plugs shall have the terminal intended for connection to the grounded (white) conductor identified. Identification shall be by a metal or metal coating substantially white in color or the word "white" located adjacent to the identified terminal. If the terminal is not visible, the conductor entrance hole for the connection shall be colored white or marked with the word "white." Exception: Terminal identification shall not be required for 2-wire nonpolarized attachment plugs. (FPN): See Section 250-119 for identification of wiring device equipment grounding conductor terminals. (c) Screw Shells. For devices with screw shells, the terminal for the grounded conductor shall be the one connected to the screw shell. (d) Screw-Shell Devices with Leads. For screw-shell devices with attached leads, the conductor attached to the screw shell shall have a white or natural gray finish. The outer finish of the other conductor shall be of a 70-34 NATIONAL ELECTRICAL CODE solid color that will not be confused with the white or natural gray finish used to identify the grounded conductor. (e) Appliances. Appliances that have a single-pole switch or a singlepole overcurrent device in the line or any line-connected screw-shell lampholders, and that are to be connected (1) by permanent wiring methods; or (2) by field-installed attachment plugs and cords with three or more wires (including the equipment grounding conductor) shall have means to identify the terminal for the grounded circuit conductor (if any). 200-11. Polarity of Connections. No grounded conductor shall be attached to any terminal or lead so as to reverse designated polarity.