School testing.

[aaelectric]

Yes all sockets would be checked but not opened. A plug in tester would be used. Would you open every light to check connections if the last fitting has good connections?
what about stage lighting multicore swa. Would all of this need testing there is. 4 poles with stage lighting and 15 amp socket outlets all connected to a dimming panel

 

[UNG]

then he is not testing 100% as he agreed with client.

forgive me if Im wrong but doesnt an eicr also state a function test?

How can you perform a function test if you dont check all spckets and it takes no extra time to do r1+r2 then zs at each socket.

(use plug in tester rather than taking fronts off)

So you are still not inspecting 100% how does a plug in tester check the integrity and tightness of the terminals at a socket

It is very easy to spout about doing a 100% I & T but I'm begining to wonder if people have different interpretations of 100%
There always will on every I & T be some compromise as to completely 100% check one RFC with 20 sockets on would take some time on a large site with a few RFC's of similar size how many circuits are you going to I & T in a day as the customer watches the costs spiral

 

[shanky887614]

So you are still not inspecting 100% how does a plug in tester check the integrity and tightness of the terminals at a socket

It is very easy to spout about doing a 100% I & T but I'm begining to wonder if people have different interpretations of 100%
There always will on every I & T be some compromise as to completely 100% check one RFC with 20 sockets on would take some time on a large site with a few RFC's of similar size how many circuits are you going to I & T in a day as the customer watches the costs spiral

I will hold my hand up and say with this firm we have never done a 100% test and inspection.

while doing work experience at another firm they did, all fronts off and test at everything.

highest reading on test sheet.

the nic inspector didnt want the guys yo test everything during inspection, he wanted zs calculated?

honestly that wouldn't be right because of parallel paths etc.

 

[davesparks]

Yes all sockets would be checked but not opened. A plug in tester would be used. Would you open every light to check connections if the last fitting has good connections?
what about stage lighting multicore swa. Would all of this need testing there is. 4 poles with stage lighting and 15 amp socket outlets all connected to a dimming panel

Go on then, how do you go about testing the stage lighting installation?
How do you carry out a Zs test on the outgoing circuits of a hardwired dimmer? Or a patch able system for that matter?

Bearing in mind stage lighting installations for everything from school halls to Glastonbury festival are my specialist subject

 

[davesparks]

Davesparks sound advice however can you always trust previous test results? Especially if it's done by some other company of which you know nothing about.

This is why you compare your results to the previous results! If they match within a sensible tolerance then you would trust them. If the test results have got drastically better then question the previous test results. If they have got worse then you need to work out if it is due to degradation or poor testing last time .


People seem to forgot that one of the purposes of writing down your test results is to be able to track any changes in the installation.

 

[shanky887614]

Go on then, how do you go about testing the stage lighting installation?
How do you carry out a Zs test on a hardwired dimmer? Or a patch able system for that matter?

Bearing in mind stage lighting installations for everything from school halls to Glastonbury festival are my specialist subject

the problem is more people selling the service as a 100% test which missing bits out isnt

 

[davesparks]

I was going to ask about the stage lx installs earlier on but got distracted. You can't do the standard tests out of the book as the dimmer effectively forms a DB (24 ways of dimming at 10A each) but each way is controlled by a dimmer so you can't just plug a loop impedance tester in the end of it and get a sensible result!

But then some testing wombles will code the whole lot C2 due to it having 'obsolete' plugs and sockets! We use 15A round pin sockets to distinguish dimmer controlled sockets from regular sockets.

 

[aaelectric]

I was going to ask about the stage lx installs earlier on but got distracted. You can't do the standard tests out of the book as the dimmer effectively forms a DB (24 ways of dimming at 10A each) but each way is controlled by a dimmer so you can't just plug a loop impedance tester in the end of it and get a sensible result!

But then some testing wombles will code the whole lot C2 due to it having 'obsolete' plugs and sockets! We use 15A round pin sockets to distinguish dimmer controlled sockets from regular sockets.

So how would you test the multicore would you need to disconnect from dimmers? Last spark left this out as lim

 

[Rockingit]

You test the multicore and the plugs and sockets each end of it for all the normal dead tests - unplugged from any dimming - and do not even think about doing any live tests as even if you don't manage to destroy something then the results will be meaningless anyway.

 

[Rockingit]

And as Dave said, round pin 15A and 5A are perfectly safe and acceptable.