hello, I want to find out what exactly a gland is used for when installing a garage consumer unit. I have 16mm Steel Wire Armour cable going into my garage. I have chased the SWA up the wall to where I would like the unit to be. This was done through use of trunking, drilled it securly into the wall and then clipped in the SWA. Is the use of a gland to make the SWA more managable? By terminating in a seperate box placed next to the CU. Or does it serve a greater purpose?