| A1 Electrical Services | 01745 720374 | | Hafod y Gan, Church Street, Llanfairtalhaiarn, Abergele, LL22 8SD |  Map & Directions |
| D B I Control | 01745 355797 | | PO Box 191, Kinmel Bay, Rhyl, LL18 5XD | | Map & Directions |
| Davies Bros | 01978 761296 | | Woodside, Wrexham Road, Cefn-Y-Bedd, Wrexham, LL12 9UW | | Map & Directions |
| Owen & Palmer Ltd | 01248 353515 | | Unit 12, Llandygai Industrial Estate, Llandygai, Bangor, LL57 4YH | | Map & Directions |
| Geoff Williams | 01745 591964 | | 12 Bryn Hafod, Rhuddlan, Rhyl, LL18 2TB | | Map & Directions |
| B & E Electrical | 01766 514973 | | Y Ffridd, Morfa Bychan, Porthmadog, LL49 9YR | | Map & Directions |
| Pareck Ltd | 01978 263636 | | Colliery Road, Rhostyllen, Wrexham, LL14 4EG | | Map & Directions |
| Lloyd Morris Electrical Ltd | 01978 291505 | | Ty Gwyn Lane, Wrexham, LL11 2UA | | Map & Directions |
| Dyffryn Electricals | 01492 641363 | | 12 Y Berllan, Llanrwst, LL26 0HR | | Map & Directions |
| Menai Electrical Ltd | 01248 353855 | | Station Buildings, Treborth, Bangor, LL57 2NX | | Map & Directions |
| A J Brown | 01766 810881 | | Pont Y Felin, Glan Y Wern Terrace, Chwilog, Pwllheli, LL53 6SN | | Map & Directions |
| Lloyd Morris Electrical Ltd | 01407 832202 | | Unit 3, Amlwch Industrial Estate, Amlwch, LL68 9BX | | Map & Directions |
| J W Jones & Son | 01492 531414 | | 3-5 Bay View Road, Colwyn Bay, LL29 8DW | | Map & Directions |
| M E Owen | 01492 581904 | | 15 Maelgwyn Drive , Deganwy, Conwy, LL31 9UY | | Map & Directions |
| Ges Controls Ltd | 01248 601005 | | Unit 8, Felin Fawr Industrial Estate, Bethesda, Bangor, LL57 4YY | | Map & Directions |
| Williams Engineering | 01341 422247 | | Unit 4, Marian Mawr Industrial Estate, Dolgellau, LL40 1UU | | Map & Directions |
| N M Archer | 01978 710722 | | Electricity House, Station Road, Overton, Wrexham, LL13 0EF | | Map & Directions |
| Elson | 01745 360662 | | Unit 5, Westbourne Centre, Wood Road , Rhyl, LL18 1DZ | | Map & Directions |
| E & K Lewis | 01286 880593 | | 16 Market Place, Penygroes, Caernarfon, LL54 6NN | | Map & Directions |
| W S Calder | 01492 518160 | | 8 Garth Road, Old Colwyn, Colwyn Bay, LL29 8AF | | Map & Directions |
| Cybi Electrical Contracting | 01407 762244 | | Cybi Buildings, St. Cybi Street, Holyhead, LL65 1DS | | Map & Directions |
| Pareck Ltd | 01978 840645 | | 55 Worsley Avenue, Johnstown, Wrexham, LL14 2TE | | Map & Directions |
| C M W Controls Ltd | 01978 661516 | | Bryn Lane, Wrexham Industrial Estate, Wrexham, LL13 9UT | | Map & Directions |
| Cambrian Electrical Engineers Ltd | 01341 422770 | | Cader Road, Dolgellau, LL40 1SG | | Map & Directions |
| G K Evans Electrical Contractors Ltd | 01745 888549 | | Nant Hall Road, Prestatyn, LL19 9LR | | Map & Directions |
| E Tobijanski | 01978 852298 | | Chain House , Chapel Lane , Llay, Wrexham, LL12 0PA | | Map & Directions |
| David Bird | 01286 676727 | | Cae Garw, Llanberis Road, Caernarfon, LL55 2DF | | Map & Directions |
| Calco Gravure Engineering Ltd | 01824 705731 | | Lon Parcwr Industrial Estate, Unit 8, Ruthin, LL15 1NJ | | Map & Directions |
| C Griffith | 01248 601173 | | 12 Garneddwen, Bethesda, Bangor, LL57 3PD | | Map & Directions |
| Fred Weston | 01745 350123 | | Rear Of, 18-20 Elwy Street, Rhyl, LL18 1BP | | Map & Directions |
| D L Evans | 01244 570692 | | Laurel Cottage, Burton Green, Rossett, Wrexham, LL12 0AW | | Map & Directions |
| D Parry & Son | 01492 516013 | | 14 West Road, Old Colwyn, Colwyn Bay, LL29 9DU | | Map & Directions |
| Peter Scott | 01766 831314 | | 12 Bowydd Street, Blaenau Ffestiniog, LL41 3HL | | Map & Directions |
| Colin Edwards | 01978 820957 | | Pendil, Llangollen Road, Acrefair, Wrexham, LL14 3RP | | Map & Directions |
| Jones Electrics Ltd | 01978 350279 | | 3 Churchlea, Rhosrobin, Wrexham, LL11 4RB | | Map & Directions |
| G Edwards | 01745 812703 | | Ar Graig, Tan Y Gwalia, Denbigh, LL16 3NN | | Map & Directions |
| D E Jones Electrical Solutions Ltd | 01490 412339 | | 3 Ffridd Y Gog, Corwen, LL21 9YE | | Map & Directions |
| Owen Electrical | 01286 871680 | | 6 York Terrace, Llanberis, Caernarfon, LL55 4TS | | Map & Directions |
| Falconer Electricals Ltd | 01766 540394 | | Blaen Cwm, Cwm Prysor, Trawsfynydd, Blaenau Ffestiniog, LL41 4TR | | Map & Directions |
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