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cliffed

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Just finished installing power sockets in It suites at a school.
All protected by 30 ma rcbo's ,circuits specified by electrical consultants,15 2 gang skts on each circuit.All working & no trip outs.
My reckoning was about 7 2 gang skts per circuit,what's your feelings on this.
Have I gotta change my reasoning on these circuits & follow suit.
 
A good idea would be to measure the actual earth leakage on the circuits with all sockets in use. I would be interested to know the results.

I used to do a lot of IT room installs for a previous company and the local authority spec was 6 double sockets per 32A ring circuit. This was based on one workstation (one pc and one monitor) per double outlet. I always thought this was a bit on the cautious side.
 
Depending on the size of board and number of circuits you can find yourself fast running out of earth terminals.
.... And it throws them out of sync when every other terminal is in the correct termination number wise.
 
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Depending on the size of board and number of circuits you can find yourself fast running out of earth terminals.
.... And it throws them out of sync when every other terminal is in the correct termination number wise.
Not a problem using 18 way TPN DB,all earths connected correctly for installation
 
Depending on the size of board and number of circuits you can find yourself fast running out of earth terminals.
.... And it throws them out of sync when every other terminal is in the correct termination number wise.

Carp just take your time jobs a good un, two earth terminals at the DB for either a Ring or Radial final circuit nothing difficult or out of the ordinary for a good Sparky, although it doesn't apply to the Domestic Installers.
 
Not a problem using 18 way TPN DB,all earths connected correctly for installation
I recently did a small(ish) office which had amongst other things 3 radial cct's with high integrity earthing fed from a 10 way single phase board. I installed an extra earth bar to accommodate the extra cpc's but didn't use it in the end as I found a different way of doing it and still achieve compliance with the regs.
 
I think this is where the Regs trips it self up in situations like this, apart from a few additional terminals for main earths, bonding etc, no standard DB can fulfill the requirements for high integratity earthing comprising more than a couple of circuits and unless the additional earth conductors are cable I'd, it would make it very confusing for the next person coming along at a later date.
 

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