| J P Electrical Installations Ltd | 01446 742867 | | 76 High Street, Barry, CF62 7DW |  Map & Directions |
| Woodland Electrical & Alarms | 01446 420333 | | 119 Woodlands Road, Barry, CF62 8EB | | Map & Directions |
| T D Edwards Ltd | 01443 409680 | | 26 Mackintosh Road , Pontypridd, CF37 4AG | | Map & Directions |
| Davies Electrical | 01656 735441 | | 2 George Street, Maesteg, CF34 0UU | | Map & Directions |
| Arb Electrical Ltd | 029 2062 3666 | | 55 Whitchurch Road , Cardiff, CF14 3JP | | Map & Directions |
| Lloyd Associates | 01656 766744 | | 92 Coychurch Road, Bridgend, CF31 2AP | | Map & Directions |
| P F Hooper | 01443 730512 | | Gwynfryn, Brynbedw Road, Tylorstown, Ferndale, CF43 3AE | | Map & Directions |
| Prolight Electrical | 01633 680585 | | 10 The Shires, Marshfield, Cardiff, CF3 2AX | | Map & Directions |
| Current Electrics | 01685 874065 | | 4 Clifton Court, Aberdare, CF44 7PD | | Map & Directions |
| A T Farrant | 029 2046 0825 | | 13 Princes Avenue, Roath, Cardiff, CF24 3SN | | Map & Directions |
| Tugbury Electrcial Services Ltd | 029 2061 9919 | | 372 North Road, Cardiff, CF14 3BP | | Map & Directions |
| High Admit Projects Ltd | 01443 218004 | | St. Davids House, Castellau Road, Beddau, Pontypridd, CF38 2RA | | Map & Directions |
| B R B Electrical | 029 2070 2326 | | The Lane, Tennyson Road, Penarth, CF64 2RY | | Map & Directions |
| C M B Electrical | 029 2077 7717 | | Unit 1, Wentloog Avenue, Lamby Industrial Park, Cardiff, CF3 2EX | | Map & Directions |
| Smith & Francis Ltd | 01656 784171 | | 13-15 New Road, Porthcawl, CF36 5DL | | Map & Directions |
| C G Bolton Electrical Ltd | 01633 680651 | | Woodvale, Mill Lane, Michaelston-Y-Fedw, Cardiff, CF3 6XT | | Map & Directions |
| Cardiff Power & Lighting | 029 2047 1849 | | Manor House, Ipswich Road, Cardiff, CF23 9AQ | | Map & Directions |
| B & W Electrical | 029 2049 1303 | | 24 Stallcourt Avenue , Cardiff, CF23 5AN | | Map & Directions |
| Aj Electrics | 01633 680251 | | Hill Crest, Newport Road, St. Mellons, Cardiff, CF3 2WH | | Map & Directions |
| Sola Electrical | 029 2085 0282 | | Welland Buildings, Penyrheol, Caerphilly, CF83 2AP | | Map & Directions |
| Aptec Systems Ltd | 029 2046 5660 | | 12 The Tudors, Melrose Avenue, Penylan, Cardiff, CF23 9BA | | Map & Directions |
| Kabel Management Services Ltd | 029 2051 1099 | | Georges Row, Dinas Powys, CF64 4LF | | Map & Directions |
| Jeff Steinz Electrical Contractors Ltd | 01656 860808 | | 24 Heol Croesty, Pencoed, Bridgend, CF35 5LR | | Map & Directions |
| Amser Group | 029 2047 3080 | | Unit 9, East Moors Road, East Moors Business Park, Cardiff, CF24 5JX | | Map & Directions |
| Dowding & Mills | 01656 645013 | | Unit A39, Kent Road , Bridgend Industrial Estate , Bridgend, CF31 3TU | | Map & Directions |
| Inspector Morse | 01656 784189 | | 48 Sandpiper Road, Porthcawl, CF36 3UT | | Map & Directions |
| A L G Electrical Ltd | 01443 742759 | | 87 Abercynon Road, Abercynon, Mountain Ash, CF45 4NG | | Map & Directions |
| K O Tech Corporation | 029 2036 2800 | | Parkway, Capital Business Park, Cardiff, CF3 2PX | | Map & Directions |
| B L Evans | 01685 876178 | | 14 Penybryn Street, Gadlys, Aberdare, CF44 8DR | | Map & Directions |
| E J Honeybun Ltd | 01443 485042 | | Smith House, Cardiff Road, Rhydyfelin, Pontypridd, CF37 5HP | | Map & Directions |
| Highlands Electrics Ltd | 01656 720330 | | 1 Attlee Street, Brynmenyn Industrial Estate, Brynmenyn, Bridgend, CF32 9TQ | | Map & Directions |
| Cowbridge & Vale Electrical | 01446 772468 | | Po Box 14, St. Mary Church, Cowbridge, CF71 7WA | | Map & Directions |
| Technical Testing Services | 01656 656145 | | 78 Heol West Plas, Coity, Bridgend, CF35 6BA | | Map & Directions |
| Roger Clarke & Co Electrical Contractors | 029 2061 2581 | | 8 Whitefield Road, Cardiff, CF14 2JG | | Map & Directions |
| P I Underwood & Son Ltd | 029 2062 3613 | | 18 Court Close, Cardiff, CF14 1JR | | Map & Directions |
| C & J Electrical Contractors Ltd | 01443 227870 | | 25 Hawthorn Road, Llanharry, Pontyclun, CF72 9JD | | Map & Directions |
| Mitie Engineering Services Cardiff Ltd | 029 2036 1963 | | Mitie House Springmeadow Business Park, Springmeadow Road, Rumney, Cardiff, CF3 2ES | | Map & Directions |
| D I C E Electrical Systems Ltd | 01656 662719 | | Unit 11/12, Crosby Yard, Bridgend, CF31 1JZ | | Map & Directions |
| Gomer Electrical Ltd | 029 2022 8384 | | Alfred Cook Building, Canal Parade, Cardiff, CF10 5RD | | Map & Directions |
| Electrical Design Installation Ltd | 029 2021 0693 | | 441 Coed-Y-Gores, Llanedeyrn, Cardiff, CF23 9UU | | Map & Directions |
| A J Crews & Co Ltd | 029 2049 9073 | | 131a Cottrell Road, Roath, Cardiff, CF24 3EX | | Map & Directions |
| C & D Electrical Services | 01446 796823 | | Penllwyn, Boverton, Llantwit Major, CF61 1UH | | Map & Directions |
| Sgd & Baynton Ltd | 029 2049 8666 | | Unit 1 Timberyard, East Molles Road, Cardiff, CF26 5EF | | Map & Directions |
| Oasis Engineering Ltd | 01685 387541 | | Unit 4 & 8 Valleys Enterprise Centre, Pant Industrial Estate, Dowlais, Merthyr Tydfil, CF48 2SR | | Map & Directions |
| R A Hitchings Electrical Contractors Ltd | 01446 773489 | | North Road, Cowbridge, CF71 7DF | | Map & Directions |
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