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Topic Title: Festival Power
Topic Summary: Testing ??
Created On: 16 August 2012 10:44 PM
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 20 August 2012 04:08 PM
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Avatar for OMS.
OMS

Posts: 19430
Joined: 23 March 2004

OMS was mentioning me as a (possible) sparks on another thread, but then I hate the chasing of walls!


Me too Dave - that's why we had electricians mates -

One of the key problems with safety related assessments, is that every party is loathe to say - "it's fine - it's low risk, move on to the more important stuff"

You see it every day in designers risk assessment - they tell competent contractors all about the risk of shock fire and burns, falls from heigh, back injuries lifting luminaires into place etc etc - these are not risks that cannot be seen by a competent person. The killers are putting bloody smoke detectors and down lights in the head of the stairwell (instead of over the accessible landing)

I see much the same in PIR's (or EICR's) - electricians simply don't want to believe, in the vast majority of simple installations, there is almost zero risk - the stats bear this out. It's just they have this overwhelming desire to "big up" the risks and from there we get all of the dross seen on reports

Regards

OMS

-------------------------
Failure is always an option
 30 August 2012 11:13 AM
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hesketh

Posts: 16
Joined: 05 November 2004

Hi All

Coming to this a bit late but as Contract Manager (and NICEIC QS) for a company who specialise in testing and signoff services for the event industry (and quite possibly the company Pete was working for as I think we were the only ones using tablets for testing on the Olympics for the temporary power supplier).
As previosuly stated the standard worked to is BS7909, which does reference BS7671. The key thing to remember is that temporary power systems for events are made up of pre-assembled parts all of which are tested prior to delivery. The main point of onsite testing is to confirm that the CPC is continuous, by way of a Zs measurement, that the RCDs operate and are set appropriately, as Pete said, the RCDs (with the exception of 32/1 and below) have a variable time delay and variable operating current.
Whilst no paperwork is completed on site, the software which we developed on the tablets doesn't just amass a huge nonsensical database, it allows us to turn the data entered by the operatives on site into a PDF certificate, similar but more detailed to that in BS7909, which is then presented to the client.

I fully acknowledge that there are probably companies out there who don't bother with testing, but in the same token it is 7 years since part p appeared and I guarantee there are still people out there who don't comply.
On that basis, I wouldn't want the electrical industry looking down its nose at the event world as though it is just a bunch of hippie-cowboys.
I can assure you it is not, we as a company have made a massive investment in developing the software we use to not only guide the tester through the process but identify errors during the testing process.

Jonathan Williams
IET » Wiring and the regulations » Festival Power

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