The cable entry diameter for the 56PA720 (Australia) or PDL56PA720 (New Zealand)
has a minimum outside diameter of 7mm and a maximum of 16mm
Please go to the website via the following links below and check under the Documentation Tab for more information.
Australia - https://www.clipsal.com/products/detail?CatNo=56PA720&itemno=56PA720-EO&backto=/search?q=56PA720&tab-document-1=0
New Zealand - https://www.pdl.co.nz/products/detail?CatNo=PDL56PA720&itemno=PDL56PA720&backto=/search?q=56PA720&tab-document-1=0