Rules for the Technical Engineering of Cable Radio and Television Systems Article 29
The head-end equipment of the system should have ground test meter protection device. For the safety protection of personnel and system equipment, the ground test meter device should have a ground test meter resistance of less than 15 Ω.For cable built on stilts in the following plumb-line ground response of electric shafts (ground test meter resistance should be less than 50Ω):1. Install underground up-leading electric shafts2. Install electric shafts for cable television amplifier and power supplier3. Install common stilt shafts for power transformer4. First and last electric shaft for every sector of the cable network built on stilt5. For continuous ten or more electric shafts of built on stilt cable network without any of the conditions mentioned above, every one in ten electric shafts.Subscriber taps or subscriber drop line should be equipped with ground test meter device and located as close as possible to ground buildings. Its ground test meter resistance should be less than 100Ω; adopters of subscriber taps ground test meter device, under the safety conditions of subscribers within the network establishment range area, may have maximum three subscriber taps sharing one ground test meter device.
中文原文 有線廣播電視系統工程技術管理辦法第29條
系統之頭端設備應有接地保護措施裝置，以保護人員及設備之安全，接地裝置之接地電阻應小於十五歐姆。
架空纜線在下列電桿之吊線應接地(接地電阻應小於五十歐姆)：
一、裝置地下引上之電桿。
二、裝置有線電視放大器及電源供應器之電桿。
三、裝置電力變壓器之共架桿。
四、每段架空線路的第一及最後一支電桿。
五、架空線路連續十支電桿以上均無上述各款情形者，每十支電桿之一。
訂戶分接器或訂戶引進線應有接地裝置，位置應儘量靠近建築物。
其接地電阻應小於一百歐姆；採訂戶分接器接地者，在確保網路建設涵蓋區域內之訂戶安全下，得以不超過三個訂戶分接器共用一處接地裝置。
架空纜線在下列電桿之吊線應接地(接地電阻應小於五十歐姆)：
一、裝置地下引上之電桿。
二、裝置有線電視放大器及電源供應器之電桿。
三、裝置電力變壓器之共架桿。
四、每段架空線路的第一及最後一支電桿。
五、架空線路連續十支電桿以上均無上述各款情形者，每十支電桿之一。
訂戶分接器或訂戶引進線應有接地裝置，位置應儘量靠近建築物。
其接地電阻應小於一百歐姆；採訂戶分接器接地者，在確保網路建設涵蓋區域內之訂戶安全下，得以不超過三個訂戶分接器共用一處接地裝置。