Jake Hearne

Degree: BEng (Hons) Electrical & Electronic Engineering

Placement: Arup

Throughout the project I improved many software skills such as Dialux, AutoCAD and Amtech which will benefit me in the future.

Jake's host company Arup is an independent firm of designers, planners, engineers, consultants and technical specialists, working across every aspect of today’s built environment. Arup help their clients solve their most complex challenges – turning exciting ideas into tangible reality as they strive to find a better way and shape a better world.

This project involved a temporary construction site in the UK and Arup needed to provide a lighting design to the contractor for use on site for the foreseeable future. Arup needed to provide a lighting layout for the site which was sufficient whilst not affecting a conservation area some distance away from the site, by ensuring the illuminance level (The amount of light hitting a specific point) was kept below a certain level.

Jake has given us an overview of his involvement in the project:

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Inset: Dialux 3D lighting calculation view

"My role on the project was to carry out the lighting calculations for the site in addition to creating schematics, ducting layouts and performing cable calculations under the supervision of an electrical engineer. In addition to the lighting power requirements, the site also required new crane and welfare facility supplies. The lighting calculations were performed within a software named “Dialux” and the lighting requirements we aimed to achieve were outlined within the appropriate British standard and CIBSE documentation for outdoor spaces, see images 1 and 2 for an example of a floorplan and 3D view of the lighting calculation itself. Due to the layout and overall size of the construction site, the lighting was required to be mounted high level on columns to avoid obstructing any possible storage space for rebar below.

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Inset: Image 3 – Ducting Layout Snippet

"Following the completion of the lighting calculations within Dialux, I needed to use a CAD software named “AutoCAD” in order to place each luminaire in it’s appropriate position on the site drawing, this was a time-consuming task although it needed to be completed accurately as the lighting calculations would be invalid otherwise! To avoid running connections to the lighting columns above ground (which would obstruct the construction areas) the option to use ducts and run cables below ground was used. The ducting layouts involved following the NJUG or “National Joint Utilities Group” documentation to ensure services were running at the standard depth below ground, this would also ensure coordination between all services. LV power ducting would be ran to all crane supplies and then A+B ducts were supplied across the site to the lighting columns to ensure resiliency.

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Inset: Image 4 – Schematic Substation Snippet

"The use of “feeder pillars” was proposed across the site for minimising cable sizes and that way the substations along the edges would have a connection to these “feeder pillars” and from that the lighting would be powered. The ducting layout was completed within “AutoCAD” also, see image 3 for a snippet of the layout. To ensure all cable sizes met the BS7671 standard, I created separate models for each substation using a software named “Amtech”. Due to the size of the site, the models often flagged that a cable run was too long and therefore needed to be reduced via additional “feeder pillars.” Following the completion of the Amtech a schematic could be built, please see image 4 for a snippet of one substation schematic.

"Overall after completing the project I felt as if I had improved most of my key skills such communication, punctuality and software skills. The communication was a key element as I was required to communicate with my team on the estimated time of completion for the lighting calculations and I was also in constant communication with the electrical engineer that was supervising me for any technical questions. Throughout the project I also improved many software skills such as Dialux, AutoCAD and Amtech which will benefit me in the future."