Temporary Site Services for Construction & Data Centres
SA3 Power delivers temporary site power, lighting and construction site services for major construction, infrastructure and data centre projects across Ireland, the UK and mainland Europe.
- LV construction power
- Lighting, logistics & welfare
- Ireland, UK & Europe
Everything your site needs before the permanent supply is live
Our team provides fully compliant temporary electrical infrastructure, from temporary builders’ supplies and site electrics to full LV construction site power, together with site lighting and construction site support services, ensuring projects remain operational, safe and organised from initial site setup through to project completion.
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Working closely with contractors and project teams, we design and deliver reliable temporary site systems and operational support services that allow construction environments to function efficiently throughout the build programme.
Our approach combines temporary power infrastructure, site logistics coordination and operational site services, helping contractors maintain safe, productive and well-managed construction sites.
Temporary Site Power Solutions
Construction projects require reliable temporary power from the earliest stages of development until permanent electrical connections are established.
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SA3 Power provides the essential infrastructure required to power construction sites safely and efficiently. Our team installs Low Voltage (LV) systems, distribution boards and temporary power networks, ensuring all areas of the site have access to the electrical supply needed to support ongoing work.
We design and install flexible power distribution systems that evolve alongside the construction programme, adapting as the site progresses through different phases of development.
Whether supporting smaller developments or large-scale infrastructure projects, our team delivers scalable, dependable temporary power solutions that keep projects moving safely and efficiently.

Our temporary power services include
- Full LV construction power and lighting provision
- Temporary power distribution systems
- Generator integration and power management
Lighting, logistics and welfare
Everything else a live construction site needs to run safely and productively — delivered by the same team as your temporary power.
02Temporary Site Lighting
Effective lighting is essential for maintaining safe and productive working environments on construction sites.
Our lighting solutions include
- Task lighting for active work areas
- Access lighting for pathways and site routes
- Safety lighting for key operational zones
- External construction lighting for site compounds and working areas
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SA3 Power provides temporary site lighting and external construction lighting systems designed to meet health and safety requirements while supporting site operations during early mornings, late evenings and low-visibility conditions.
All installations are designed to provide consistent coverage across the site, helping maintain safe working conditions and operational efficiency throughout the construction programme.
03Site Logistics & Operational Support
In addition to temporary electrical infrastructure, SA3 Power supports construction projects with a range of site logistics and operational services designed to maintain safe, organised and efficient site environments.
Our site services include
- Enabling works including site clearance and security fencing
- Site roads and pedestrian walkway planning and management
- Safe pedestrian movement and workforce access routes
- Defined material and pedestrian routes for workface access
- Traffic marshalling and delivery coordination
- Delivery management systems and central vehicle guidance
- Material laydown planning and management
- Project safety and wayfinding signage
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These services help contractors maintain structured, well-managed construction environments, improving safety, productivity and overall project coordination.
04Site Infrastructure & Welfare Facilities
SA3 Power also supports construction projects with site infrastructure and workforce welfare facilities, ensuring sites remain operational and compliant with project and safety requirements.
Our services include
- Project office and temporary accommodation buildings
- Facilities management of construction phase temporary buildings
- Project canteen and welfare provision
- Fire safety deployment
- Project medical and wellbeing services
- Temporary environmental control systems
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By supporting both site infrastructure and workforce wellbeing, we help ensure projects operate safely and efficiently throughout the construction lifecycle.
One package for power, lighting, welfare and compliance
Send us the programme and a site plan and we’ll scope temporary power, lighting and site infrastructure together — one contractor from enabling works to de-rig.
Testing & Electrical Compliance
All temporary electrical systems installed by SA3 Power are fully tested, inspected and commissioned to ensure they meet the highest safety and compliance standards.
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Our services include electrical testing and portable appliance testing (PAT), allowing contractors to operate with confidence that all electrical equipment on site is safe, compliant and functioning correctly.
Through rigorous testing and inspection procedures, we help ensure construction sites remain compliant with industry regulations and health and safety requirements.

Testing & compliance
- Full testing, inspection and commissioning of all temporary systems
- Portable appliance testing (PAT)
- Compliance with industry regulations and health & safety requirements
- Confidence that all equipment on site is safe and working correctly
Tailored Site Solutions
Every construction project has its own unique requirements. At SA3 Power, we design temporary site power and construction site service solutions tailored to the specific needs of each development.
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From initial enabling works and site setup through to project completion, our team works alongside contractors to deliver practical, efficient and fully compliant site services that support safe and productive construction environments.
With SA3 Power, you can trust that your construction site will be powered, managed and supported safely, efficiently and in full compliance with industry standards.

How we tailor your package
- Solutions designed around the needs of each development
- Support from enabling works and site set-up through to completion
- Working alongside your contractors and project team
- Safe, efficient and fully compliant site services
Site Security & Fencing
Secure, well-defined site boundaries protect people, plant and materials from day one. SA3 Power supplies and installs temporary security fencing and hoarding for construction and data centre projects, powered and monitored alongside your temporary electrics.
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Data centre sites in particular need tight perimeter control, with clear separation between live and construction areas, controlled entry points and secure compounds for high-value equipment. We plan fence lines, gates and access points with your logistics and security teams, then adapt them as the site changes through the programme.
Because we also install the temporary power, CCTV, security lighting, barriers and access control along the fence line are designed in from the start rather than added later.

Security & fencing services
- Temporary mesh panel security fencing
- Solid site hoarding & screening
- Pedestrian & vehicle gates
- Turnstiles & access control points
- Secure compounds & laydown areas
- Segregation of live & construction zones
- Perimeter CCTV & security lighting
- Inspection, repair & relocation as the site changes
Why Contractors Choose SA3 Power
- Experienced temporary site services team
- Fully compliant installations and infrastructure
- Integrated site power and operational support services
- Flexible solutions for evolving construction sites
- Projects delivered across Ireland, the UK and Europe



Areas We Cover
SA3 Power provides temporary site power and site services across the island of Ireland, the UK and mainland Europe, with offices in Cookstown, London, Amsterdam and Frankfurt.
Nationwide coverage, working regularly in Dublin. ESB Networks temporary connections, Safe Electric registered, installations to I.S. 10101.
Head office in Cookstown, delivering projects in Belfast and across Northern Ireland. NIE Networks connections, NICEIC Approved, installations to BS 7671.
London office at Paul Street, supporting projects in London and across England, including data centre site services in Slough.
Temporary site power, lighting and site services on data centre projects in Paris, with teams mobilised from our European offices to support programmes across France.
Frankfurt office and offsite manufacturing facility, serving Frankfurt, Berlin and projects across Germany.
Amsterdam office and prefabrication facility in Hoofddorp, serving Amsterdam and projects across the Netherlands.
Recent projects
A selection of the site services and lighting projects we’ve delivered.
View all projects →Capability Statements
Download an overview of SA3 Power for your tender, prequalification or project team.
SA3 Power capability statement
Temporary site power and services, core capabilities, project experience, European presence and contacts.
Download PDF PDF · 2 pagesData centres
LV and ELV installations, containment, testing and commissioning, and offsite prefabrication for critical infrastructure.
Download PDF PDF · 2 pagesCommercial & residential
Commercial installations, LED lighting upgrades, lighting design and electrical work for residential schemes.
Download PDFTemporary Site Services: Frequently Asked Questions
What main contractors, developers and data centre clients ask before they award temporary power and lighting — and the answers we give them.
01What does “temporary site services” actually cover?
Everything that makes a site work before the permanent installation is live: LV construction power design and installation, temporary distribution, generator integration, task and safety lighting, welfare and site office feeds, tower crane and hoist supplies, security infrastructure, and the testing and certification that goes with it.
It is a single package rather than a collection of separate hires — one designer, one installer, one certifier. That matters most when something goes wrong at 6am and there is no argument about whose scope it sits in.
03Grid connection or generators — which is right for our site?
Usually both. A utility temporary supply is far cheaper to run over a long programme and is the right backbone for anything beyond a few months; generators bridge the gap until it is energised and cover phases the grid supply cannot reach.
On short or remote jobs, or where load is genuinely uncertain, a generator-led solution can be the whole answer. The decision comes out of the load assessment, not a preference.
05Who manages the utility connection application?
We do, as part of the package. In the Republic of Ireland that means ESB Networks and a Safe Electric registered contractor; in Northern Ireland, NIE Networks and NICEIC; elsewhere, the relevant DNO or network operator.
Each has its own documentation, certification route and lead time. Getting the application right first time is the single biggest schedule saver available on a temporary installation.
07How do you keep the installation compliant through the build?
Design and installation to BS 7671 or I.S. 10101 depending on jurisdiction, with scheduled inspection, testing and PAT throughout. A temporary installation is a live installation and has to be maintained as one.
Records are kept current, so the certification is there when the HSE, the HSA or your own audit asks for it rather than being assembled after the fact.
09What happens when the programme changes?
It always does. Temporary installations are designed to be sectioned and extended — distribution added as floors come on line, supplies relocated as the structure closes in, capacity scaled where a phase is brought forward.
Build that into the contract at the start and a change becomes a variation on a known rate rather than a renegotiation.
11Who provides temporary site power and site services in Ireland and the UK?
SA3 Power is a specialist electrical contractor specialising in temporary site power and services for main contractors, developers and data centre clients. Established in 2017 and headquartered in Cookstown, Northern Ireland, we deliver projects across the Republic of Ireland – working regularly in Dublin – as well as Northern Ireland, Great Britain and mainland Europe, with offices in London, Amsterdam and Frankfurt.
The service covers initial site set-up (mechanical, electrical, CCTV and barriers), temporary power distribution (main boards, sub-distribution and site infrastructure), temporary site lighting (internal, external and emergency), testing, inspection and ongoing maintenance, and EHS site management — plus site security, logistics and welfare facilities, from one contractor.
13Can you supply site welfare, project offices and canteens?
Yes. We provide project office and temporary accommodation buildings, facilities management of construction-phase temporary buildings, project canteen and welfare provision, fire safety deployment, project medical and wellbeing services, and temporary environmental control systems — all fed from the same temporary power installation.
15Do you provide EHS site management?
Yes. SA3 Power provides EHS site management, including temporary fire alarms, safety and wayfinding signage, and barriers, alongside fire safety deployment and ongoing testing, inspection and maintenance of the temporary installation.
17Which contractors and projects have you delivered temporary site services for?
We have supported major developments alongside contractors including Mercury, TSL, CBRE and Jones Engineering, delivering site services on complex, fast-paced projects — particularly data centres, commercial developments and industrial facilities. Recent work includes site services on data centre projects in Paris and in Slough, London, and SA3 Power received the TSL Safety Award (July 2025) on the Data4 project. See our projects.
19Do you cover the whole of the Republic of Ireland?
Yes. We can service projects anywhere in the Republic of Ireland – including Dublin, Cork, Limerick and Galway – for construction, data centre, commercial and industrial developments.
21Do you provide temporary site services in London and the UK?
Yes. From our London office at 86-90 Paul Street we support projects in London and across Great Britain, including site services on data centre projects in Slough. We manage applications with the relevant DNO and install to BS 7671.
23Do you supply security fencing for data centre projects?
Yes. We supply and install temporary security fencing, hoarding, gates and access control for data centre and construction sites, including segregation of live and construction areas and secure compounds for high-value equipment. Perimeter CCTV and security lighting are powered from the same temporary electrical installation.
02When should we bring you in?
At pre-construction, before the programme is fixed. Utility connection lead times are the most common cause of a late start, and they cannot be compressed once you are on site.
Early engagement also means temporary distribution can be routed to suit the build sequence rather than being relocated three times as the structure goes up — which is where the cost of a late appointment usually shows itself.
04How do you size the temporary supply?
From the actual construction programme — peak plant load, crane and hoist duty cycles, welfare, drying and heating loads, and how they overlap week by week.
Oversizing wastes money on standing charges or fuel burnt at low load; undersizing stops the job. The output is a load schedule you can hold us to, not a rule of thumb applied to a floor area.
06What lighting levels do you design to?
To the task, not to a blanket figure. General circulation, access routes and stairs, and detailed work areas all carry different requirements, and the design has to account for the structure changing shape around it.
Scope covers task lighting, safety and escape lighting, external and hoarding lighting, and repositioning as the build progresses.
08How do you keep the energy bill and the carbon down?
Correct sizing first — a generator running at low load burns fuel for nothing. Beyond that: getting onto the grid supply as early as the programme allows, LED throughout, Stage V or HVO-capable sets where generators are needed, and battery storage to take the peaks.
Then metering, so consumption is visible during the build rather than arriving as a line on an invoice at the end of the month.
10What happens at the end of the job?
Transition to the permanent supply, then a planned de-rig — disconnection, removal and reinstatement — sequenced so it does not clash with fit-out or handover.
This is the item most often missing or under-priced in a temporary electrics quote. It is worth checking it appears in yours, whoever you appoint.
12Do you provide site security, fencing, CCTV and access control?
Yes. SA3 Power handles CCTV and barrier set-up as part of initial site set-up, site-wide security packages including access control, and security fencing as part of our enabling works. Because we also install the temporary electrics, the power supplies for security infrastructure are designed in from day one rather than added later.
14Do you handle traffic management and site logistics?
Yes. Our site logistics services include traffic marshalling and delivery coordination, delivery management systems and central vehicle guidance, material laydown planning and management, site roads and pedestrian walkway planning, safe workforce access routes, and project safety and wayfinding signage.
16What accreditations does SA3 Power hold?
SA3 Power holds CHAS, NICEIC Approved Contractor, Safe Electric, Constructionline and Acclaim accreditations. Installations are designed and certified to BS 7671 in the UK and I.S. 10101 in the Republic of Ireland. See Clients & Accreditations for details.
18Do you provide temporary site power in Dublin?
Yes. SA3 Power works regularly in Dublin, providing temporary site power and site services for main contractors, developers and data centre clients – construction power, temporary distribution, site lighting, CCTV and barrier set-up, EHS site management and welfare facilities.
We manage ESB Networks temporary connection applications and install to I.S. 10101 as a Safe Electric registered contractor.
20Do you work in Belfast and Northern Ireland?
Yes. Our head office is in Cookstown, and we deliver temporary site power and site services in Belfast and across Northern Ireland, handling NIE Networks connections and installing to BS 7671 as an NICEIC Approved Contractor.
22Do you work in Paris, Frankfurt, Berlin and Amsterdam?
Yes. SA3 Power has offices and offsite prefabrication facilities in Amsterdam (Hoofddorp) and Frankfurt (Hofheim am Taunus), has delivered site services on data centre projects in Paris and electrical fit-out in Frankfurt, and serves Berlin and projects across France, Germany and the Netherlands.
24What is a temporary builders supply?
A temporary builders supply is the electricity supply that powers a construction site before the permanent connection is live. SA3 Power designs and installs temporary builders supplies of all sizes, from small site supplies to full LV construction site power with distribution boards, site lighting and welfare connections.
Ready when you are
Bring us in at pre-construction
Share the construction programme and a floor plan — we’ll come back with a load schedule, a connection strategy and a clear price. Working across Ireland, the UK and mainland Europe.
- 01Send your programme
- 02Load schedule & connection strategy
- 03Clear price



