2395 on Wednesday! Wish me luck.

[Sparkie30]

Yeah i wasnt 100% sure either. waffled something just for a punt really. I also walked out and all sorts of stuff were going through my head, like the SWA termination inspection. Was it just after about the termination or the glanding? I ended up putting ID of conductors, tightness of terminals, presence of cpc, correct polarity and if the insulation was still intact. Not sure if that was what if it was after.

if i remember correctly it said inspection of swa cable and its conductors, 3 phase and neutral
i put correct identification of conductors by means of sleeving
banjo fitted correctly and earthed to earth bar
correct type of swa gland is used either interior or exterior
check is correctly and securely fixed
the shroud is in place to protect the gland from moisture

think about it this test is mainly inspections

 

[Sparkie30]

If I recall it was to ensure the correct function of equipment under normal service conditions.

which question you referring to ?

 

[spark 68]

which question you referring to ?

Volt Drop

 

[Sparkie30]

Volt Drop

well it was question 4a and it was about the water heater circuit in a 13a fcu i think anyway. what was your volt drop ?
i worked it to be 6.8v

 

[spark 68]

well it was question 4a and it was about the water heater circuit in a 13a fcu i think anyway. what was your volt drop ?
i worked it to be 6.8v

I did the 2391 a while back

It is 3% for lighting and 5% for everything else generally

So for a water heater 11.5 V would be allowed.

 

[Sparkie30]

I did the 2391 a while back

It is 3% for lighting and 5% for everything else generally

So for a water heater 11.5 V would be allowed.

ok good on you 2391 boy. i thought you sat last night the exam. yes of course those are the right maximum permitted volt drop allowed.

 

[Silly Sausage]

Best of luck, My 2391-10 is framed

With the wife's pic behind?

 

[Silly Sausage]

one question that really got me was something like whats the purpose of the of confirming the volt drop? have to say my brain had nothing for that. left unanswered, 3 marks it was.

Apart from other answers already posted, would an excessive volt drop be indicative of a high Z esse?

 

[spark 68]

Apart from other answers already posted, would an excessive volt drop be indicative of a high Z esse?

No, because the CPC would only come into play during a fault, not during normal operation a high R1 and Rn maybe

 

[Sparkie30]

Apart from other answers already posted, would an excessive volt drop be indicative of a high Z esse?

there were no Z esse on the exam paper.

 

[Silly Sausage]

No, because the CPC would only come into play during a fault, not during normal operation a high R1 and Rn maybe

OK then, would it show up a dodgy Neutral?
Obviously have to be a loaded live test, L to N.

 

[spark 68]

OK then, would it show up a dodgy Neutral?
Obviously have to be a loaded live test, L to N.

I am not really sure what you are getting at Archy, we were told measuring the voltage at each end is not a valid test, it was to be calculated by measuring the resistance of the cable and estimating the length via the tables, working out your design current, then calculating your mV/A/m over a 1000.

 

[jic89]

if i remember correctly it said inspection of swa cable and its conductors, 3 phase and neutral
i put correct identification of conductors by means of sleeving
banjo fitted correctly and earthed to earth bar
correct type of swa gland is used either interior or exterior
check is correctly and securely fixed
the shroud is in place to protect the gland from moisture

think about it this test is mainly inspections

Ahh see I thought it had termination in bold which I took as the actual cores terminated in the terminals :dunce2:

 

[Diddy]

I think a combination of my "To comply with BS7671" answer AND as said to ensure "safe" operation of any connected load/equipment.

 

[Silly Sausage]

I am not really sure what you are getting at Archy, .............

Don't worry about it Sparks mate, I was rambling!!!