{"id":24298,"date":"2018-04-13T08:46:10","date_gmt":"2018-04-13T07:46:10","guid":{"rendered":"http:\/\/learntechnique.com\/?p=24298"},"modified":"2021-03-30T15:21:18","modified_gmt":"2021-03-30T14:21:18","slug":"how-is-ads-achieved-in-a-domestic-premises","status":"publish","type":"post","link":"https:\/\/learntechnique.com\/how-is-ads-achieved-in-a-domestic-premises\/","title":{"rendered":"How is ADS achieved in a domestic premises?"},"content":{"rendered":"

The protective measure Automatic Disconnection of Supply (ADS) is used in most electrical installations to provide protection against electric shock. This article provides an overview of how ADS is achieved in a typical domestic premises.<\/strong><\/p>\n

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The general requirements for ADS consist of provisions for basic and fault protection, which are considered as follows (Regulation 411.1 of\u00a0BS 7671\u00a0<\/em>refers):<\/p>\n

Basic protection<\/strong><\/p>\n

Basic protection is required to prevent contact with live parts and is generally verified by inspection. In domestic premises, contact with live parts may occur as a result of damage to cable insulation or enclosures or barriers are missing. For example, the possibility of contact with live parts may exist where a suitable barrier (as shown in Fig 1) has not been fitted in the spare ways in a consumer unit or unused entry holes in the enclosure are not suitably closed. For these reasons, all electrical equipment should comply with at least one of the provisions for basic protection described in Section 416 (Regulation 411.2 refers).<\/p>\n

For a domestic installation, the basic requirements for protection against the ingress of solid objects are that:<\/p>\n