i just got the right amount of sockets and the right wiring and trips ( i have 8 trips at 20a each (240v ) puling less than 13a per trip )
how many machines do you have connected to each strip?
would you be kind enough to provide a link to what kind of strips you have?
thanks

http://www.electricalcounter.co.uk/products/Switches+%26+Sockets/Nexus+800+Series/Slim+Single+Plug+Socket+1+Gang+13+Amp+Switched+-+White+Plastic/1295468100?gclid=CKy01f_V1LcCFQ_LtAodhzAALgjust standard plug sockets wired on a ring main just like all other standard plug sockets in the uk
i just brought a load of plug sockets ( wall sockets 4 single plug sockets on each 20a trip ) i pull just over 4Amps per plug but only use 3 plugs on each trip ( 21 rigs at under 1kw each )
have all you guys conciderd the power factor ?
at a power factor of 1 240w at 240v would be 1Amp
at a power factor of 0.5 240w at 240v would be 2Amp ( some older psus dont have powerfactor corection bilt in to them )