Pre site inspection 2391-52 scenario

[ruston]

I would say that all the members on here love their job and the challenges it brings. Once the understanding is there everything falls into place , the more understanding you get the easier it gets and the more you want to know......

 

[PEG]

I think you were correct. Ignoring the regs and requirements,for a minute,the tests to check the supply characteristics,are not onerous or particularly time consuming.

They can,on occasion,flag up issues,and lead us in other directions,sometimes directly concerned with safety,which is a primary reason for most of our governance.

I would hazard a guess,that the others on your course,giving you a hard time,were probably older,maybe considering themselves to have so much more experience,these tasks were unnecessary. They are wrong.

We can all shoe,a dead horse. It is probably easier.
But sooner or later,when we stick our hand out for payment,someone is going to ask if we checked...

 

[richy3333]

Had almost this situation in real life. Went to do an addition. Checked EFLI before starting and they’d lost their earth due to corrosion of conductors on the pole outside. DNO came straight out and fixed it.

 

[gazdkw82]

Passed the theory exam today. Very hard

 

[westward10]

Top job well done.

 

[westward10]

Earth fault loop impedance revision of ENA Engineering Recommendation P23 - https://electrical.----------/wiring-matters/issues/72/earth-fault-loop-impedance-revision-of-ena-engineering-recommendation-p23/ This is an interesting read for max Ze values probably one of the few places you will find it recorded, Engineers Recommendation P23/2:2018.

 

[H]

Passed the theory exam today. Very hard

Well done firstly

How and in what way was it difficult?

 

[ruston]

Well done mate , I just knew by your questions you had it in the bag

 

[gazdkw82]

Well done firstly

How and in what way was it difficult?

Understanding what the question is truly asking if the biggest challenge. Once you break the questions down it's usually simple but the questions are really tricky.

For example I had one that said something along the lines of "a 30ma RCD was tested at 150ma and found to trip at 500ma. What would this indicate"

Possible answers were,

A. The rcd provides efficient fault current protection

B. The rcd will be subject to noisance tripping

C. The rcd test button has been regularly checked

D. (Something along the lines of) the rcd is working perfectly.

It had me guessing because it's not obvious.

Some of the questions were difficult to find or work out. For example, if a earth electrode has a resistance of 27ohms, what would be the maximum rated rcd allowable on the installation....

Just a few examples. I can remember quitr a few but I'd be here all night.