These requirements cover antenna-discharge units for radio and television receiving equipment and amateur radio-transmitting and -receiving equipment@ to be employed in accordance with the National Electrical Code@ NFPA 70. An antenna-discharge unit ?C hereinafter referred to as a discharge unit ?C as covered by these requirements consists of a gap@ a fixed resistance or other discharge element@ or a combination of such features@ connected between each antenna lead-in terminal and a grounding terminal.