Electrical Contracting News (ECN) August 2016 - Page 26

COMMERCIAL INSTALLATION requirements highlight that all enclosure requirements are different. In most general purpose indoor and outdoor installations mild steel is usually a suitable solution. Mild steel offers a cost effective solution for many applications and, when used with protective powder coatings, offers ingress and impact protection to provide resistance to corrosion when used in damp or wet environments. For continually wet and harsh environments, stainless steel enclosures have much better resistance to corrosion, while Glass Reinforced Polyester (GRP) does not corrode, has good UV resistance and offers ingress and impact protection equivalent to mild and stainless steel. One important factor when considering ATEX enclosures is that “ THE CORRECT DESIGN AND SELECTION OF CABLE MANAGEMENT PRODUCTS IS VITALLY IMPORTANT FOR THE LONGER TERM MAINTENANCE AND RELIABILITY OF AN ELECTRICAL INSTALLATION. although they comply with all of the IEC directives, each requires a certificate of conformity once a modification has been made. This must be supplied by the company or person making the modification and any installation needs to Enclosures are one of the ways businesses can protect themselves. be assessed to meet the requirements of the atmosphere. Enclosures are also secure and lockable meaning access can be controlled to a select group of people within a business. As some installations can often be dangerous and difficult to manage, having a secure enclosure means commercial buildings are protected against potential fire risks and costly downtime, as well as any tampering or misuse. The correct design and selection of cable management products is vitally important, not only for safety reasons, but for the longer term maintenance and reliability of an electrical installation. Ensuring that components are durable, have the correct ingress protection (IP) rating, resistance to corrosion, vibration and physical damage all lead to an installation that offers long term reliability, be it in a factory, hospital, office, shopping centre or school. The regulation BS7671 applies to all types of electrical installations systems in a building, including those of distribution circuits and final circuits, safety services and data and communications services. Installers and specifiers therefore have a duty of care in all sectors to ensure cabling and people are not exposed to preventable risks, especially if their customers are not aware of the regulation changes. The updated requirements outline the need for cabling near escape routes to be supported by non-combustible fasteners and fixings which are not liable to premature collapse in extreme heat. These changes mean that non-metallic cable ties, plastic wall plug fixings, plastic trunking and plastic cable clips are no longer compliant with the new regulations. Fastenings need to be tested and certificated to the recognised standards, and while installers and specifiers will now be well aware of these updates, business owners also need to understand and potentially change their existing systems. Cable requirements for commercial installations vary from business to business and while all installations are different, installers need to ensure that they are providing the most secure solution that adheres to all relevant legislation. Not only does this provide businesses with peace of mind that their building is compliant with regulations, but it also protects them against potential fire and explosions. Compliance In addition to ATEX approved enclosures, businesses must also adhere to Amendment 3 to the BS7671:2008 Requirements for Electrical Installations. The changes to the IET Electrical Regulations last year were widely reported and it is vital that installers are aware and communicate the updates to customers to ensure they are complying with legislation. Steve Slater has been in the electrical industry for more than 40 years, initially joining HellermannTyton in the Procurement department nine years ago. Now working as a product manager, Steve specialises in cable equipment engineering and new product development. 26 25-26 Commercial Installation – HT.indd 26 18/07/2016 10:34