Triple Plating an Isolator
Posted: Sun Oct 11, 2020 4:34 pm
Just for arguments sake because I'm pretty damn certain this is absolutely not ok because it defeats the wholesaler purpose of a device for isolation by still having live parts in the device after the isolator is off but I have a number of people arguing it's ok
So, what's your opinion? Is this ok? Or absolutely not?
For further reference the actual situation it's being done in is in PV installs where there inverter has a removable section for maintenance and repair, because there is external isolation device the DC is always live in this compartment so there argument is that the external AC isolation device they have installed is fine to be triple plated due to the live parts of AC also contained in this compartment
Furthermore under current rules as covered in a earlier post this external AC isolation device technically doesn't even need to be there, as it's actual isolation device is at the switchboard, could this also change things due to the secondary device not actually being needed for isolation so simply used as a functional switch that triple plating could be acceptable practice
So, what's your opinion? Is this ok? Or absolutely not?
For further reference the actual situation it's being done in is in PV installs where there inverter has a removable section for maintenance and repair, because there is external isolation device the DC is always live in this compartment so there argument is that the external AC isolation device they have installed is fine to be triple plated due to the live parts of AC also contained in this compartment
Furthermore under current rules as covered in a earlier post this external AC isolation device technically doesn't even need to be there, as it's actual isolation device is at the switchboard, could this also change things due to the secondary device not actually being needed for isolation so simply used as a functional switch that triple plating could be acceptable practice