Asking for information only - no forseeable plans!
What is the usual configuration for a light industrial electrical installation?
Following mostly from observation & guesswork - please correct as necessary:
Incomer, 3 phases and neutral + earth (depending on local earthing arrangements) Each phase fused at 100A (or whatever, but I'm guessing this is a common setup) Single meter, but recording consumption on each phase Single (or several) consumer unit(s) each carrying all 3 phases. Distribution of 3 phase to machinery (usually hardwired) is each on a seperate MCB - no rings Same with hard wired single phase machines -all spurs, no rings. All hardwired machines must have an isolator next to them (and an NVR?) There are also single phase (16A?) "blue" sockets for non-hardwired machines What's the rating on 3 phase connectors? Regular 3-pin socket outlets, where used, are connected onto a single phase per floor - ring mains used?. Lighting may be on a different phase per parallel strip to reduce strobing problems (loop in used like domestic?) RCD's - not used on hardwired machines, may be present on single phase outlets (never on 3 phase outlets?)
What would be a typical cost for a 3 phase new connection, assuming it's available nearby? Are standing charges and per unit charges similar to domestic tariffs?