Hi all, looking for a bit of advice and confirmation on my proposed plans for a SWA sub main to a ISO metal storage container. I've calculated the max demand in the ISO will be about 20A (300w of led lighting and 2 double sockets for chargers etc) It will be fed from a 3ph DB in another building. The cable run is 100 meters, I'm planning on using 16mm 2 core swa ( Volt drop calcs allow about 35A with 16mm) and installing a rod at the container (the vast majority of the cable run is at height, clipped to the building). The container will have a small 4 way board with RCD main switch.
The 16mm will be fed from a C32 breaker in the 3Ph board. Im installing double insulated 16mm tails and a 16mm earth from the 3ph DB to a meter (needs a meter installed) then from the meter to an adaptable box where I will terminate the SWA. Due to the fact that I'm using a rod at the other end, I'm planning on a 100ma S rcd for fault protection for the SWA (inside the adaptable box).
Can anybody see any glaring errors in my method? I have spoke to Napit and they were fine about my proposed plan, but they didn't mention the 100mA rcd.
Thanks in advance!
The 16mm will be fed from a C32 breaker in the 3Ph board. Im installing double insulated 16mm tails and a 16mm earth from the 3ph DB to a meter (needs a meter installed) then from the meter to an adaptable box where I will terminate the SWA. Due to the fact that I'm using a rod at the other end, I'm planning on a 100ma S rcd for fault protection for the SWA (inside the adaptable box).
Can anybody see any glaring errors in my method? I have spoke to Napit and they were fine about my proposed plan, but they didn't mention the 100mA rcd.
Thanks in advance!