WHB range of isolators have dual 25mm screwed conduit entries top and bottom (up to 55 amp.) Allows four ways to surface wire the switch. 55 Amp. and above are also available with
32mm entries top and bottom. Example WHB355/32IP66, 440V 55A triple pole with 32mm conduit entries.
For further information, please refer to the below link: http://www.clipsal.com/Trade/Products/ProductDetail?catno=WHB355/32