Posted By Andrew Brown By 'Commando' you mean ceeform? Three phase or single phase? Current carrying capacity? I assume being an office its 16A single phase. My view is if its plug and socket no problem, just make sure all the equipment plugged into the floor box is turned off/ disconnected first. As i remember 16A single phase is rated for disconnection under load anyway above that you should turn off the load first. Supplies above 16A often have local isolation for the specific socket so this should be turned off also. In general there are two ways to make up an electrical system. The above is an example of a very simple temporary or flexible system. 1 Permanent system. Have a competent person design and assemble the system from components and then test the whole system. 2 Temporary or flexible system. Have a competent person design a modular system and assemble the components into modules. All modules are plug and socket and incorporate protection where required. Test all the modules. The system of tested parts can then be assembled by a trained person (not 16th edition). The suuply that you will be connecting to needs to have been tested also. Plug and play works well for simple systems but larger systems may still require a competent person to design it or check it.