Client Brief

Our client Dollman Ralston instructed us to complete the design & installation of the electrical switch room. The existing switch room was under a permit to work scheme & we had to sign the key out/in daily.

Project Delivery

• 2no Schneider panel boards were installed on unistruts bolted to the wall.
• 300x300mm galvanized trunking was installed underneath both panel boards to house the single core supply cables & for us to gland off all the outgoing SWA supply cables.
• 300mm galvanized tray was bolted to the walls so we could bring the outgoing SWA supply cables down to the trunking.
• A 400amp switch fused isolator Glasgow was installed next to panel board 1 with 300mm singles feeding out the isolator to the panel board.
• A 630amp switch fused isolator Glasgow was installed next to panel board 2 with 400mm singles feeding out the isolator to the panel board.
• 900mm heavy duty ladder rack was installed from the ceiling to provide the outgoing cables a containment route to their destinations. This was suspended from the ceiling using threaded rods and unistruts.
• All cable terminations were torqued to the manufacturer’s recommendations.
• 2 new LV panel switch isolators were installed into the spare spaces inside the existing 1600amp LV switch panel. 1no 400amp switch & 1no 630amp switch.
• A new sub main cable 185mm 4core was terminated into the 400amp LV switch panel to feed panel board 2 (non-essential supplies).
• 2no 150mm 4 core SWAs wired in parallel were terminated into the 630amp LV switch panel to feed panel board 1 (essential supplies).
• All outgoing SWAs & earth cables from both panel boards were terminated into 3 phase distribution boards located in server rooms, plant rooms & kitchen area.

Project Duration

7 months

Project Cost

£57k

Materials / Technology

Eaton 400amp switched fused isolator. Eaton 630amp switched fused isolator. Schneider Acti9 3 phase distribution boards, RCBOs, MCBs. Schneider 3 phase panel boards, MCCBs. Legrand heavy duty ladder rack. Legrand medium duty cable tray. Legrand 300x300mm trunking. Prysmian Bicon CW glands. Schneider LV panel switch gear (1x 400amp & 1x 630amp).