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Topic Title: Some design Critique needed! Topic Summary: Created On: 24 January 2013 07:29 PM Status: Post and Reply |
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 24 January 2013 07:29 PM
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Hello,
I would dearly like some feedback on my proposed solution for a new shed supply. Its a PME supply, shed is timber framed installed less than a foot from the gable end wall and the run is 28m. Current fuse board has no RCD protection and the earthing and bonding are 10mm. The main fuse is a 60 amp 1361. My proposed solution is to install a metal clad 32 amp isolator and run a 4mm two core armoured cable to the garage. The armourings will act as the downstream cpc. I was planning on feeding the 32 amp isolator via 16mm double insulated meter tails installed in pvc trunking. In the shed itself, potentially in the future a water supply may be needed as the shed is being used to manage business affairs. I decided to install a TT system and insulate /terminate the incoming earth armourings. I have not proposed to install rcd protection for the downstream armoured but have done so for the shed final circuits. Any feedback much appreciated!! Daniel |
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24 January 2013 07:47 PM
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Hello, I would dearly like some feedback on my proposed solution for a new shed supply. Its a PME supply, shed is timber framed installed less than a foot from the gable end wall and the run is 28m. Current fuse board has no RCD protection and the earthing and bonding are 10mm. The main fuse is a 60 amp 1361. OK My proposed solution is to install a metal clad 32 amp isolator and run a 4mm two core armoured cable to the garage. The armourings will act as the downstream cpc. I was planning on feeding the 32 amp isolator via 16mm double insulated meter tails installed in pvc trunking. Overcurrent protection and earth/fault short circuit protection on the SWA.? 16mm2 is a bit mental for a 32A supply with 4.0mm2 conductors In the shed itself, potentially in the future a water supply may be needed as the shed is being used to manage business affairs. I decided to install a TT system and insulate /terminate the incoming earth armourings. OK - where does the water supply come from and will it be metallic ? I have not proposed to install rcd protection for the downstream armoured but have done so for the shed final circuits. OK - no real problem with that - ensure you keep good seperation between the armouring and the shed earth marshalling terminal Any feedback much appreciated!! See above Daniel Regards OMS ------------------------- Failure is always an option |
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Some design Critique needed!
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