Discuss New to site, looking for advice on supply to steel container . in the The Welcome Forum area at ElectriciansForums.net

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WTJ

Hi, Everyone and thanks for the welcome from Dan.
I had originally been asked to install a light in a small steel container, used as a tool store at a commercial premises. The container is situated outside, mounted on wooden sleepers on a concrete base. Its sandwiched between to large wooden sheds. The supply to the premises is PME. There is a distribution board fed from a sub main in the shed next door, which has bonding back to the intake.
I thought the best approach was to take the supply from a 16A 30mA rcbo in the shed consumer unit, via a fused spur and run a sheathed cable in plastic conduit, using plastic waterproof light fitting in the steel container, making it a double insulated installation, with no earth connection or bonding to the steel container.
However, the customer has now asked for a socket to be installed in the container, to enable charging of power tool batteries. Even though the socket would be a plastic outdoor type, I believe the regs. say that the installation cannot be class 2, if a socket is installed. Therefore would I have to earth and bond the steel container ? It is mounted on wooden sleepers, but the resistance between the steel container and the consumer unit inside the large shed next door measures approx. 12,000 ohms measured in damp conditions.
I would appreciate if anyone could give their opinion on this install. Thanks everyone.WTJ.
 
Bonding the container may be a problem as the cpc of the supply cable will have to have an equivalent csa of the required main protective bonding.
 
Bonding the container may be a problem as the cpc of the supply cable will have to have an equivalent csa of the required main protective bonding.
or TT the bloody container. disassociate the supply earth.
 
Thanks Andy. Do you know if it would also be advisable to earth the container via an earth rod, as it is off the ground and the supply is PME.
 

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