Power on site from day one. We manage temporary supply applications, specify the correct capacity, and coordinate the transition to permanent supply.
Every temporary supply engagement follows a clear, managed sequence. Here is exactly what happens at each stage.
The most common and costly mistake with temporary supplies is undersizing. A minimum three-phase 63A supply is the starting point for most residential construction sites. Sites with tower cranes, concrete pumps, large hoists, or heavy plant running simultaneously will need significantly more. Getting the specification wrong means an abortive DNO visit, a programme delay, and additional cost to uprate. USP assesses the actual site power demand before submitting the application.
A straightforward LV temporary supply typically takes 4 to 12 weeks from application to energisation. Supplies that require highway excavation, traffic management, or works to existing DNO assets take longer. USP factors the temporary supply lead time into your overall programme from the outset and submits the application in parallel with the permanent connection application to avoid sequential delays on the critical path.
Where DNO lead times are long, site access is difficult, or the programme duration is short, a diesel or HVO generator may be the better option. Generator hire typically costs £200 to £500 per week including fuel, depending on size. For short programmes or remote sites, this can be more economical than a grid connection. USP can advise on generator sizing, hybrid grid-generator solutions, and the crossover point at which a grid connection becomes more economic.
The transition from temporary to permanent supply requires careful coordination. USP manages the sequencing of permanent energisation and temporary disconnection to minimise interruption to the site. Show homes and sales suites must be energised from the permanent supply before the temporary is removed. Where plot completions are occurring, the transition must not cut power to occupied or near-complete properties. USP plans the transition as part of the overall energisation programme.
The critical parameters that govern every temporary builders supply.
Temporary supply coordination as part of your complete electricity connection package.
Every electricity connection we deliver meets the highest industry standards. Worker safety, public safety, environmental responsibility, and project compliance from planning to sign-off.










50 Google Reviews
I contacted USP and within minutes had a chat with Justin who described exactly how the job would be done and provided a comprehensive quote including labour and materials and was able to start the work in just 7 days. Justin and his team were brilliant and did an amazing job. I can highly recommend USP.
Jack and Joel were absolutely amazing this morning and really put themselves out to dig a hole without having to dig another hole in my drive. More work for them but one happy customer.
From the initial quote through to work completion, Justin and his work partner were a mix of professional, knowledgeable, good-humoured, and clear in all explained (I felt an instant ease to agree to the work). The work itself was excellent and they left the place immaculate!
George and Jack come out today to move a gas meter. It wasn't a straightforward job, but they both took time to talk me through what they were doing and what the next steps are. Very friendly and polite and thought about the needs of our family.
Jack and George are great.
Bang on time, completed the work perfectly, no issues. Left the meter really neatly finished. Jack and Joel were very courteous and did a great job.
George and Jack turned up and did a first class job, very friendly and professional. Great job lads.
Jack and Joel were brilliant. Very polite, worked to my highest expectations. Left the area as clean and tidy, as was possible. And explained every step of the process to me, answering any questions I had.
Fantastic work from Jack and Johl.
Tell us about your project and we will advise on temporary supply specification and lead times within 24 hours.
Prefer to talk? Call 024 7542 6505 for immediate service.