Multi Utility

Our services include all onsite works as well as the offsite points of connection.

Multi Utility is the most efficient and effective method of installing multiple mains and service cables and pipes as they can all be installed and constructed in one trench in one visit. We will ensure that the impact of multiple utility installations is reduced to a minimum, allowing you to concentrate on the development of your site with limited or no disruption to your construction programme.

Your on-site cost-savings and efficiencies are maximised as we install all utilities in one common trench, resulting in backfilling and reinstatement only being required once instead of multiple times when working with single utility companies.

By choosing IUS to install your site utilities, you will reduce your internal management time as we will manage all aspects of the design, installation, construction, testing, commissioning, piecing-through, jointing and metering of all utilities.


IUS have a range of experience in this field. Read more about our expertise.

IUS is a turnkey contractor with the capability to survey and design all aspects of substation and feeder route activity, to deliver an optimum solution. We have a documented design management process across all our business sectors including Multi Utility, Independent Connections, Primary Major Project Substations and general High Voltage Contracting activities. The process defines quality system requirements and establishes and maintains a consistent approach to the design of electrical and where required, gas and water networks.

This ensures suitably qualified and experienced staff are engaged on the design, prevailing standards are adhered to and finalised designs are checked and approved before release. Our procedure defines responsibilities and routines, which shall be applied to your contract specific designs. All personnel involved within this procedure are made aware of their responsibilities and are adequately trained and competent to undertake designs allocated to them. Staff are trained and developed in accordance with our staff selection, training and development procedure.

With an approved design in place, IUS can meet all your electrical construction needs, with the ability to competitively procure High Voltage switchgear, transformers, cables and all ancillary items required within a substation. We have the necessary experience within our design and operational delivery teams to identify the appropriate apparatus to build an effective power solution. This can be an adoptable Independent Connection; a High Voltage Distribution Network; a Primary Major Project Substation or a Multi Utility scheme. Our policy establishes the standards to ensure that all procurement activities are carried out professionally, ethically and in compliance with all laws and legislative requirements. The policy also takes into consideration our commitment to safety, the environment and the principle of total quality. The Company adopt a consistent approach to best practice procurement procedures with robust processes and systems in place.

In advance of the site works, IUS will produce the necessary site-specific documentation to meet your construction requirements. Collated via our dedicated Project Manager, this will include method statements, risk assessments, HSQE plans, delivery programmes as well as reporting templates. The on-site works will be installed with Quality Assurance applied throughout the delivery phase. Also, via our Customer Charter, we seek Feedback on your experience with IUS.

Throughout our substation construction and maintenance activities, control of electrical safety on site is a vital part of the services IUS provides. Our in-house testing and commissioning staff have a wealth of experience regarding switching tasks, issuing and cancelling of safety documentation, testing electrical protection relays and commissioning new apparatus including High Voltage switchgear, DC systems, SCADA and remote-control devices.

When carrying out works for Distribution Network Operators, installing Independent Connections, constructing Primary Major Project Substations or completing High Voltage Contracting activity, our Senior Authorised Personnel have the necessary experience, training and competency to effectively manage an electrical network safely. Our capability also extends to our Multi Utility business where we will test and commission your electricity, water and gas networks.

In addition to designing, supplying, installing and testing & commissioning your substation apparatus, IUS can Operate and Maintain your High Voltage system. As defined in the Electricity at Work Act 1989, there is a requirement for High Voltage network owners to maintain electrical equipment in a safe condition. To achieve this IUS has the High Voltage authorised, competent and experienced personnel to complete substation inspections as well as planned maintenance of switchgear, transformers and ancillary apparatus. Our High Voltage Customer Service (HVCS) manage a multitude of clients across all sectors including renewables, health, education, water, petrochemical, pharmaceutical, defence and manufacturing industries.

We also carry out a range of services for Distribution Network Operators, where our operational staff has comprehensive knowledge of Distribution Safety Rules and Operational Practice Manuals. We can also provide added value services associated with power system protection studies, generator connections, harmonic surveys, power factor correction, partial discharge testing and transformer oil analysis. As your appointed Operation and Maintenance contractor IUS will provide the High Voltage authorised personnel for both planned works as well as fault diagnosis and emergency repair. Our aim is to engage collaboratively with your organisation to satisfy all current legislation including the HSG230 requirement to keep electrical switchgear safe. This will assist in allowing staff to work safely and maximise your High Voltage asset life cycle.

Generator Connection In Lieu Of Substation Connection For New Homes Development Toot Lane - Boston - Lincolnshire

Toot Lane - Boston - Lincolnshire

The scope of these works was to provide the Developer with a temporary supply as the Distribution ...


Gleeson Homes


Generator Connection in Lieu of Substation Connection for an 85 New Homes Development


Toot Lane - Boston - Lincolnshire

  • Two 50kVA 3 phase generators
  • Installation of MEMESgenerators
  • Connection of cut-out and breach joint termination
  • 10m earthing arrangements
  • Secured compound area created by Gleeson Homes

The scope of these works was to provide the Developer with a temporary supply as the Distribution Network Operator (DNO) was unable to provide the substation permanent connection, with new house owners ready to move in.

To enable power to be available it was agreed with the Developer and DNO that a generator and back up connection would be installed temporarily.


IUS installed two 50kVA 3 phase generators at the agreed point of temporary connection within the lockable compound provided by Gleeson Homes. This was coupled with a 200 Amp cut-out and a corresponding breach joint. The cut-out was housed within a lockable unit provided by the Developer. This work involved an IUS team, which included a Senior Authorised Person (SAP), Project Manager, Project Coordinator, Cable Jointers and an Electrical Fitter who was to test the earthing arrangement.

This element of the works was critical to the developer meeting their connection targets, and during adverse weather conditions, under the supervision of the IUS SAP the generators were connected to the mains supply successfully. All the Low Voltage connections activity as well as the relevant tests were carried out by appropriately trained, authorised and competent personnel.

Gleeson Homes Head of Technical and their Managing Director thanked IUS for carrying out this work and meeting their mid-year target completions which had been at risk. This enabled their customers to move into their brand-new Gleeson home.


Lovell Homes - Howden - Goole

Lovell Homes

The scope of works included the design, procurement and installation of UDE (Unit Distribution Equipment) substation ...


Lovell Homes


Substation for 174 New Homes Development


Selby Road - Howden - Goole

  • HV and LV network design
  • Installation of 11kV substation to include HV switchgear, 800kVA transformer and 5 way LV fuse board to supply 174 new homes
  • Construction to the adoptable standards of Northern Powergrid (Npg) and ESP Utilities Group (ESPUG)

The scope of works included the design, procurement and installation of UDE (Unit Distribution Equipment) substation consisting of Schneider Electric RN2-C HV switchgear, 800kVA transformer, complete with a close coupled 5-way LV board. The UDE, once energised, provided power to 174 new homes on the Saddlers Grange development in Howden. This substation is dual owned by Northern Powergrid (NPg) and ESP Utilities Group (ESPUG), therefore constructed to the adoptable standards of both parties.


IUS installed approximately 300m of 3 x 1 core 300mm aluminium XLPE cable from the substation location to the agreed point of connection, together with an 80m length of 70mm bare copper earth, which forms part of the HV earthing arrangement. IUS then carried out excavation works around the substation building to install this earthing system. The programme was critical as the housing developer had prospective homeowners eagerly waiting the handover of their new properties. IUS successfully met the expectations of Lovell Homes and their customers by executing our works within the allotted timeframes.

The IUS protection engineer carried out the pre-commissioning tests including primary and secondary injection testing. Once the UDE had been successfully tested our HV authorised cable jointers attended site to carry out the HV cabletermination and LV terminations at the 5-way LV board.

As well as IUS cable jointers and the protection engineer, other trained, authorised and competent members of the site delivery team included our electrical fitters and the Senior Authorised Person responsible for safety documentation. The key points of contact for Lovell Homes was the IUS project manager and project coordinator, who have the responsibility, as per there titles, for the management and coordination of all the works. The IUS team all contributed to the safe and successful energisation of an essential substation asset.


Case Studies

Our key services

Careers in IUS

Read More


IUS News

21st Consecutive RoSPA Gold Award
Achilles UVDB Audit
Zero Non-conformances