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Wiring a metal container

cydodimead
I have a job where the client wants some power and lighting in 2 containers in the yard of their unit. Conveniently there happen to be a couple of 16A single phase commando sockets (protected by RCBO's 16A 30mA) on the exterior wall of the unit a couple of metres from where the containers are located. Would I be right to treated the container as a Caravan? Supply to unit is TN-C-S (PME) so I don't want to export the PME earthing to the containers. I'm thinking the following to meet requirements.


1. Swap RCBO's for MCB's

2. Put 2 pole 30mA RCD in line (perfect bit of trunking on inside of building where I can put an enclosure with the RCD)

3. Small DB inside Container with MCB for twin 13A socket, and 2nd MCB for lights. All protected by double pole RCD. Earth from 16A socket on building not connected to container DB.

4. Earth stake from container DB through tarmac ground soil. Could I link bonding from one container to the other?


Having never wired a caravan pitch, caravan or container I just wanted to be sure I have read the regs correctly?
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    UKPN:

    Quite correctly, you choose not to use the PME supply, The ESQCR regulations make it clear that this kind of structure, with a steel covering needs an independent earth. The DNOs requirement is 2 meters separation from any metalwork connected to the PME network, which I am confident you can establish. 

    Regards, UKPN ?Zap


     


    That is an interesting perspective. The ESQCR may have an impact on a customer but they do not apply to customers. As far as I can see the supplier is not to offer a PME terminal to a caravan or boat but I don’t see anything else mentioned. But that’s beside the point, once a supply is delivered to an installation then I doubt that the supplier will take a great deal of interest in what the customer connects to it thereafter. Maybe there is a UKPN scanner van that checks such things, if so there are a lot of caravans parked in driveways with orange leads going through walls and windows that should be investigated.! 


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  • 0
    UKPN:

    Quite correctly, you choose not to use the PME supply, The ESQCR regulations make it clear that this kind of structure, with a steel covering needs an independent earth. The DNOs requirement is 2 meters separation from any metalwork connected to the PME network, which I am confident you can establish. 

    Regards, UKPN ?Zap


     


    That is an interesting perspective. The ESQCR may have an impact on a customer but they do not apply to customers. As far as I can see the supplier is not to offer a PME terminal to a caravan or boat but I don’t see anything else mentioned. But that’s beside the point, once a supply is delivered to an installation then I doubt that the supplier will take a great deal of interest in what the customer connects to it thereafter. Maybe there is a UKPN scanner van that checks such things, if so there are a lot of caravans parked in driveways with orange leads going through walls and windows that should be investigated.! 


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