Sadly the jaws on the Nipex do not meet and the bevel of the 'cutting' edge is so shallow that it is more like a crimper. Farnell are refunding me the cost and leaving me with the duff tool as it is not worth the returns cost etc.
Knipex 7AWG cable stripper jaws
Knipex 7AWG cable stripper effect on 6mm cable 
Initial ring-main distribution box 
Distribution box for computer workstation. The overlap with the 230v Mains: external is that they both take power from the inverter via a fuse box. There the fuse box feeds two internal circuits. The extension connection goes to the previously used three gang flying extension, now pretty much fixed to the wall and a 6A fuse that feeds a line to a) a junction box from where a cable goes through the wall to a 2 gang socket,
Wooden 2 gang socket
and to
b) feed to another junction box to a 2 gang socket installed above the tool bench, and also
c) feeds a third 2 gang socket in the corner of the computer desk.
Cable running to 2gang socket at computer station Have laid 13A cable to an external rubber housed 13A socket. This has a 13A plug in the toolroom which plugs into a 3 gang socket block which inturn plugs into the inverter.
Rubber housed external socket
External wiring from socket, with kinks to allow for expansion of wood and contraction of copper in winter. The entrance is through a 10mm piece of copper pipe.
Internal part of mains cable. The 13A plug is fitted with a 5A fuse as the 23ov source, the Victron 12|1200 inverter can only supply (1200w ÷ 230v < 5.2A
Flying lead that connects to inverter, via the white 3 gang socket block. This is a temporary arrangement.
Inverter set on open aluminium shelf for cooling