D Thomas Electrical

22/02/2026

Why do we have yearly assessments?

To make sure we continue working to BS 7671 Wiring Regulations standards.

This allows us to self-certify our work, giving our customers peace of mind that every installation is compliant, safe, and completed to the highest standard.

Pam mae angen asesiadau blynyddol?

I sicrhau ein bod yn parhau i weithio yn unol â safonau Rheoliadau Gwifrau BS 7671.

Mae hyn yn ein galluogi i hunandystio ein gwaith, gan sicrhau i’n cwsmeriaid fod pob gosodiad yn gydymffurfio, yn ddiogel, ac wedi’i gwblhau i’r safon uchaf.

02/11/2025

Rydym newydd gwblhau’r gwaith trydanol ar yr uned laeth Newydd.

Roedd y gwaith yn cynnwys:

• Dyluniad a gosodiad trydanol llawn
• Bwrdd dosbarthu 3phase newydd
• Generadur wrth gefn wedi’i osod a’i brofi
• Rheoli ceblau ar drac dur
• Goleuadau ar hyd a lled yr orseddfeydd

Rydym yn ymgymryd â gwaith trydanol domestig, amaethyddol a masnachol.

We’ve just finished the electrical work on this new dairy unit, full design and install done.
Work includes:

• Full electrical design and installation
• New 3-phase distribution board
• Backup generator installed and tested
• Connection to new 3-phase supply
• Steel tray cable management
• Lighting throughout the parlour

We cover domestic, agricultural & commercial electrical work.

20/09/2025

Gwnewch eich cartref neu’ch busnes yn barod ar gyfer generator!

Gyda thoriadau pŵer yn dod yn fwy cyffredin, gallwn gyflenwi a gosod y generators cywir i’ch anghenion — o unedau petrol sy’n cadw goleuadau a gwresogi i rhedag, i systemau mawr 100kVA ar gyfer gofynion mwy.

Mae switsys newid dros dro awtomatig neu â llaw yn ei gwneud hi’n hawdd ac yn ddiogel newid rhwng y prif gyflenwad a’r generator

Cysylltwch â ni i drefnu ymweliad safle.

Make your home or business generator-ready today

With power cuts becoming more frequent, we can supply and install the right generator for your needs — from compact petrol-powered units that keep essentials circuits like lighting and heating running, to large 100kVA systems for bigger demands.

Automatic or manual changeover switches make it easy and safe to switch between mains and generator power.
Contact us to arrange a site visit

02/09/2025

Allan â’r hen Wresogydd Storio Economy 7,
i mewn â’r Heatstore newydd – hyd at 36% yn fwy effeithlon! ⚡🔥

Uwchraddiad sy’n dod â gwres mwy cyfforddus, ac costau rhedeg is

📩 Anfonwch neges atom i drefnu’ch uwchraddiad!

Out with the old Economy 7 Storage Heater,
in with the new Heatstore – up to 36% more efficient! ⚡🔥

An upgrade that delivers more comfort, and lower running costs

📩 Message us to book your upgrade!

13/08/2025

Supply newydd i bwmp dwr a soced 63amp allanol ar gyfer hen wagen.

New borehole water supply for the property, along with a 63A electrical hookup supply to an old wagon.

16/06/2025

Ein system solar cyntaf wedi orffan. 20 o baneli wedi iw osod ar to box profile yn defnyddio system renusol, gan gynnwys 15kwh o fatris.

Our first solar system finished. 20 panels installed on box profile roof using renusol system including 15kwh of batteries.

20/05/2025

Prosiect ychydig yn wahanol, estyniad gegin - industrial style! Wedi ei wneud efo galvanised conduits a socedi dur.

Something a little different, kitchen extension - industrial style! Finished with galvanised conduits and steel sockets.

10/03/2025

Gwasanaeth newydd ar gael, y platform yn codi hyd at 6.5m yn ddiogel. Cysylltwch am fwy o wybodaeth.

New service available, the platform reaches up to 6.5m safely. Get in touch for more information.

19/02/2025

D Thomas Electrical diolch am y gwaith mae’r van yn edrych yn dda.

04/02/2025

Rydym yn cynnig amryw o wasanaethau trydanol domestig, masnachol ac amaethyddol, gan gynnwys;

• Gwasanaethu ac atgyweirio
• Ailweirio a gosodiadau
• Profi ac ardystio trydanol (cymeradwywyd gan NAPIT)
• Profion PAT
• Adroddiadau cyflwr trydanol
• Gosod gwefrydd EV
• Synwyryddion mwg, gwres a charbon deuocsid
• Meysydd carafanau a phorthdai
• Goleuadau argyfwng
• Galwadau brys
• …a mwy.

Rydym wedi penderfynu newid enw’r busnes o Egni Electrical i D.Thomas Electrical fel bod o’n fwy personol a chofiadwy. Cysylltwch gydag unrhyw ymholiadau.

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We offer a range of domestic, commercial and agricultural electrical services, including;

• Servicing and repairs
• Rewires and installations
• Electrical testing and certification (NAPIT approved)
• PAT testing
• Electrical condition reports
• EV charger installation
• Smoke, heat and carbon dioxide detectors
• Caravan parks and lodges
• Emergency lighting
• Emergency call out
• …and more.

We’ve decided to change the business name from Egni Electrical to D.Thomas Electrical so that it’s more personal and memorable. Get in touch with any enquiries.

Trydanwr domestig, masnachol ac amaethyddol yng Ngwynedd.

Qualified electrician in Gwynedd covering domestic, commercial and agricultural works. NAPIT registered.