Hi,
i run a few different businesses from home and I thought I'd ask around on here before I call another electrician out for a second opinion.
ive just had a seperate consumer unit added as a sub panel from my main 200a breaker to a newly built building on my land which is going to be used as for commercial servers.
I run up to 30 servers at a time each with a 600w power supply. I resell webhosting to small business and a lot of other stuff. I host a lot of VPN servers which get a heck of a lot of traffic so my severs are always busy. Traffic flowing from all over the world.
I called a local electrician out last week to get the electrical installed for the whole warehouse he added all the sockets I needed however what really concerns me is fire safety so I made sure I triple checked with him informing him that in total I could be using 11000 watts and want to make sure I have room to expand aswell.
This is a fully functioning business so i so I know I need a lot of watts to run all this however I'm no electrician.
i checked the width of the cable he used from the consumer unit to the sub panel which is only a couple of meters due to the consumer unit being on my far wall and new outhouse 2m away from the main building.
The width is 13.5mm and after looking around converts to 6mm2 CSA.
is this size cable really enough to be constantly running this many watts?
Im calling out another electrician this week either way to be safe but I figured several opinions on here couldn't hurt
cheers
Thread is sounding more and more ridiculous, according to your opening post this work was done by this 'electrician' last week, where you triple checked, yet have no written contract. But now you are on about getting a 'second' electrician in because you think from google searching that the work was done wrong?
It certainly sounds more like a builder was asked to put in some electrics designed after googling "how to install power for an American server room" , then an electrician has refused to connect it up and issue a proper installation certificate, rather they've just done a PIR and issued a condition report. Then building control are not happy with signing off this "new building" without proper electrical certificates, so you are trying to figure out what you messed up on by trying to do a job on the cheap.
Mr Murdoch hit the nail on the head with his statement "
I simply don't believe you commissioned a spark to install a submain and CU for IT servers and they've come up with the solution you have outlined". And I can't think of any customers who would have the mindset that oh the work done last week was wrong, I had better ring a second electrician rather than calling the original person back to rectify their mistakes. It really is all to far fetched.
No initial written design or schedule of works, No consideration of division of installation to prevent single RCD power loss, (This is also needed just for a basic house re-wire, so should have been considered in the design for new sub-mains), No calculation of expected load and design current, No consideration of high CPC leakage currents, No proper installation certificate. They are just far too many simple basic design faults to suggest a competent electrician has been involved at the start of the job, that you supposedly triple checked they understood what you wanted.
Doc H.