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.
452-2006由UL - UL 发布于 2006-11-02,并于 2015-12-25 实施。
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