110V site transformers
Site transformers from 1kVA to 10kVA, 230V or 400V in, 110V centre-tapped to earth out.
Run 110V tools and lighting safely from any mains supply. Portable transformers from 1kVA to 3.3kVA, and a 10kVA three-phase site transformer. Used for: Running 110V power tools and site lighting safely from mains supplies.
Trade only. EW Group serves the electrical trade exclusively and is committed to protecting pricing within the trade. Open a trade account in under an hour.
Photo coming soonGuides
- What size site transformer do I need?
- Why do UK building sites use 110V?
- What size cable do I need? 110V cable size and voltage drop calculator
Also in: Site Temps · Electrical
Questions we get asked
What is 110V CTE?
110V CTE (centre tapped to earth) is the reduced low voltage supply used on UK construction sites. The site transformer's 110V output is centre-tapped to earth, so each live conductor is only 55V from earth (63.5V on a three-phase supply), and a shock is far less dangerous than from 230V mains.
How many festoon lights can I run off one transformer?
Each of our 50m LED festoon kits draws about 130W (20 heads of 6.5W). A 16A outlet at 110V supplies up to about 1,760W, so add up the kits on each outlet, leave headroom, and keep the total within the transformer's continuous rating. Check the festoon spec sheet for how many kits can be linked in one run, or ask us and we'll work it out for your site.
Need it tomorrow? Order by 1pm.
Send us your list, a drawing or just a description of the job. We'll come back with a quote within an hour and have it on its way next day, or ready to collect from Bristol or London.