Electrical Contracting News (ECN) March 2017 - Page 51

UPS & POWER DISTRIBUTION SPECIAL FEATURE of exceptions to this rule. For example, temporary power for fairgrounds is covered by BS7671 alone without the explicit need for BS7909. These complexities mean event organisers can easily get lost in guidelines, making it essential that contractors understand the relevant legislation and double check the compliance of equipment. This can be easily done by consulting the certification that is supplied with the product. Temporary power for fairgrounds is covered by BS7671 alone without the explicit need for BS7909. Even after the event begins, a contractor’s work is not finished. Setting up Once compliance has been confirmed, contractors can begin to set up distribution equipment. In most cases, the installation process is straightforward as organisers will have purchased plug and play power systems that provide simple assembly and connection. Yet there are several application and environmental factors contractors must consider. In the initial brief provided, the event organiser should have supplied a diagram mapping where everything at the event will be set up. Contractors use this to determine where each application is and to determine the best means of distributing power to them. Understandably, the set-up process at an event can be hectic as many structures are being installed simultaneously. Electrical contractors can minimise disruption by beginning the process of fitting distribution equipment after the initial set-up begins, allowing other fitters to have established the groundwork for structures first. It is not uncommon for last minute layout alterations to occur, leading to contractors having to move equipment around accordingly. Contractors must therefore be versatile and able to easily reposition equipment on an ad hoc basis, which is why most event organisers will purchase plug and play electrical equipment so that it is fast and efficient to assemble and take down without the need for heavy duty tools. Likewise, contractors must consider the environment when installing equipment. Event organisers can easily get lost in guidelines, making it essential that contractors understand the relevant legislation. For instance, running cables long distances between stages at a festival may not be advisable due to the number of vehicles travelling along trackways. Similarly, all cabling must be fitted safely and securely with minimal crossing of walking spaces to avoid posing a health and safety risk to attendees. Environmental considerations are also important for power distribution units, which are prone to being damaged during setting and packing due to the discrete colouring of enclosures. It is for this reason that we regularly urge organisers to use event power distribution units with bright enclosures to ensure visibility. Nibley Festival Even after the event begins, a contractor’s work is not finished. As anybody that attended the 2015 Nibley music festival — which famously lost power mid-afternoon on the second day and wasn’t restored for the remainder of the show — can attest, problems with power distribution equipment during events are not unheard of. As such, contractors must be on hand to help restore power in a timely and efficient manner. The first step to doing this is by ensuring that there are additional cable runs available to extend or replace existing lines as necessary. Cabling is a likely cause of failure during large scale events, so having a back up will minimise the impact of power cuts. However, the most effective way for contractors to resolve issues with other equipment, such as transformers and distribution units, is to have an emergency event power supplier on hand. For example, ide Systems’ rental service, can provide same-day delivery of replacement equipment to ensure that power is restored effectively. While the process of physically installing temporary event power systems is relatively straightforward, the surrounding considerations are more complicated. With the right preparation and planning, contractors can work with organisers to provide stable power and help foster the overall growth of the event industry. March 2017 | 51