| Owen Electrical | 01286 871680 | | 6 York Terrace, Llanberis, Caernarfon, LL55 4TS |  Map & Directions |
| B & E Electrical | 01766 514973 | | Y Ffridd, Morfa Bychan, Porthmadog, LL49 9YR | | Map & Directions |
| Cybi Electrical Contracting | 01407 762244 | | Cybi Buildings, St. Cybi Street, Holyhead, LL65 1DS | | Map & Directions |
| Jones Electrics Ltd | 01978 350279 | | 3 Churchlea, Rhosrobin, Wrexham, LL11 4RB | | Map & Directions |
| G T N Electrical Security Services | 01978 754884 | | Smithy House, Southsea Road, Southsea, Wrexham, LL11 6PP | | Map & Directions |
| Peter Scott | 01766 831314 | | 12 Bowydd Street, Blaenau Ffestiniog, LL41 3HL | | Map & Directions |
| Menai Electrical Ltd | 01248 353855 | | Station Buildings, Treborth, Bangor, LL57 2NX | | Map & Directions |
| Henry Williams | 01492 572666 | | Unit 15, Ffordd Sam Pari, Morfa Conwy Business Park, Conwy, LL32 8HH | | Map & Directions |
| C D S Electrical | 01244 577912 | | Eaton House, Burton Green, Rossett, Wrexham, LL12 0AW | | Map & Directions |
| M E Owen | 01492 581904 | | 15 Maelgwyn Drive , Deganwy, Conwy, LL31 9UY | | Map & Directions |
| Lloyd Morris Electrical Ltd | 01978 291505 | | Ty Gwyn Lane, Wrexham, LL11 2UA | | Map & Directions |
| Dob Electrical Ltd | 01248 600679 | | 3 High Street, Ogwen Terrace, Bethesda, Bangor, LL57 3AY | | Map & Directions |
| Gareth W Edwards | 01678 521128 | | Garwen, Rhyd Uchaf, Bala, LL23 7SD | | Map & Directions |
| D B I Control | 01745 355797 | | PO Box 191, Kinmel Bay, Rhyl, LL18 5XD | | Map & Directions |
| N W Edwards | 01978 757652 | | Springcroft, Waen Road, Coedpoeth, Wrexham, LL11 3PP | | Map & Directions |
| Kennedy Electrical Ltd | 01248 713165 | | Tall Trees, Lon Ganol, Llandegfan, Menai Bridge, LL59 5TL | | Map & Directions |
| Celec Ltd | 01691 774444 | | White House/black Park, Halton, Chirk, Wrexham, LL14 5BD | | Map & Directions |
| Geoff Williams | 01745 591964 | | 12 Bryn Hafod, Rhuddlan, Rhyl, LL18 2TB | | Map & Directions |
| G Edwards | 01745 812703 | | Ar Graig, Tan Y Gwalia, Denbigh, LL16 3NN | | Map & Directions |
| H R S Electrical | 01248 716701 | | 22 Ffordd Rhiannon, Llanfairpwllgwyngyll, LL61 5QB | | Map & Directions |
| Fred Weston | 01745 350123 | | Rear Of, 18-20 Elwy Street, Rhyl, LL18 1BP | | Map & Directions |
| C M W Controls Ltd | 01978 661516 | | Bryn Lane, Wrexham Industrial Estate, Wrexham, LL13 9UT | | Map & Directions |
| Davies Bros | 01978 761296 | | Woodside, Wrexham Road, Cefn-Y-Bedd, Wrexham, LL12 9UW | | Map & Directions |
| Don Hughes | 01978 757121 | | Fron Hedd, Penygelli Road, Coedpoeth, Wrexham, LL11 3RW | | Map & Directions |
| C H Livingstone Ltd | 01978 266858 | | Unit 4, Rivulet Road, Cambrian Price Industrial Estate, Wrexham, LL13 8DL | | Map & Directions |
| Colin Edwards | 01978 820957 | | Pendil, Llangollen Road, Acrefair, Wrexham, LL14 3RP | | Map & Directions |
| W S Calder | 01492 518160 | | 8 Garth Road, Old Colwyn, Colwyn Bay, LL29 8AF | | Map & Directions |
| J W Jones & Son | 01492 531414 | | 3-5 Bay View Road, Colwyn Bay, LL29 8DW | | Map & Directions |
| E & K Lewis | 01286 880593 | | 16 Market Place, Penygroes, Caernarfon, LL54 6NN | | Map & Directions |
| Pareck Ltd | 01978 840645 | | 55 Worsley Avenue, Johnstown, Wrexham, LL14 2TE | | Map & Directions |
| E W E Ltd | 01978 752275 | | Unit 21, Two Mile Industrial Estate, Quarry Road , Brynteg, Wrexham, LL11 6AB | | Map & Directions |
| Williams Engineering | 01341 422247 | | Unit 4, Marian Mawr Industrial Estate, Dolgellau, LL40 1UU | | Map & Directions |
| Owen & Palmer Ltd | 01248 353515 | | Unit 12, Llandygai Industrial Estate, Llandygai, Bangor, LL57 4YH | | Map & Directions |
| Cambrian Electrical Engineers Ltd | 01341 422770 | | Cader Road, Dolgellau, LL40 1SG | | Map & Directions |
| C Griffith | 01248 601173 | | 12 Garneddwen, Bethesda, Bangor, LL57 3PD | | Map & Directions |
| Malcolm Electrics | 01341 247597 | | Ty Gwyn, Ffordd Glan Mor, Talybont, LL43 2AR | | Map & Directions |
| Dyffryn Electricals | 01492 641363 | | 12 Y Berllan, Llanrwst, LL26 0HR | | Map & Directions |
| D L Evans | 01244 570692 | | Laurel Cottage, Burton Green, Rossett, Wrexham, LL12 0AW | | Map & Directions |
| Electromec Ltd | 01978 661781 | | Unit 5 Ridley Wood Industrial Complex, Bryn Lane, Wrexham Industrial Estate, Wrexham, LL13 9UT | | Map & Directions |
| Lloyd Morris Electrical Ltd | 01407 832202 | | Unit 3, Amlwch Industrial Estate, Amlwch, LL68 9BX | | Map & Directions |
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