{"id":694183,"date":"2024-11-06T05:35:38","date_gmt":"2024-11-06T05:35:38","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/ul-497b2017\/"},"modified":"2024-11-06T05:35:38","modified_gmt":"2024-11-06T05:35:38","slug":"ul-497b2017","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/ul\/ul-497b2017\/","title":{"rendered":"UL 497B:2017"},"content":{"rendered":"<p><b>1 Scope<\/b><\/p>\n<p>1.1 These requirements cover protectors for data communications and fire-alarm circuits.<\/p>\n<p>1.2 As covered by these requirements, data communications circuit protectors and fire-alarm circuit protectors consist of single- and multiple-pair air-gap arresters, gas-tube arresters, or solid-state arresters, with or without fuses or other voltage-limiting devices.  Data communications circuit protectors and fire-alarm circuit protectors are intended to protect equipment, wiring, and personnel against the effects of excessive potentials and currents caused by lightning in communications alarm-initiating or alarm-indicating loop circuits.<\/p>\n<p>1.3 This standard does not cover the following:<\/p>\n<blockquote>\n<p>a)\u00a0\u00a0\u00a0\u00a0Lightning protective devices for the protection of primary distribution wiring systems and equipment such as AC branch circuit protection.<\/p>\n<p>b)\u00a0\u00a0\u00a0\u00a0Antenna discharge units for radio- and television-receiving appliances.<\/p>\n<p>c)\u00a0\u00a0\u00a0\u00a0Lightning conductor and air terminals for connection of lightning rods for building protection.<\/p>\n<p>d)\u00a0\u00a0\u00a0\u00a0Protective devices to be used on telephone lines or telephone lines connecting to the telecommunication networks.<\/p>\n<\/blockquote>\n<p>1.4 A product that contains features, characteristics, components, materials, or systems new or different from those in use when the standard was developed, and that involves a risk of fire, electric shock, or injury to persons shall be evaluated using the appropriate additional component and end-product requirements as determined necessary to maintain the level of safety for the user of the product as originally anticipated by the intent of this Standard.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Standard for Protectors for Data Communications and Fire-Alarm Circuits<\/b><\/p>\n<table style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/ul\/\"><b>UL<\/b><\/a><\/td>\n<td>2017-02-10<\/td>\n<td>27<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":694196,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2680],"product_tag":[],"class_list":{"0":"post-694183","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-ul","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/694183","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/694196"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=694183"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=694183"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=694183"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}