RFC in lounge and dining room

[william1]

View attachment ring main table 1.pdf
i hope the table is attached i have to know what plug socket is the mid-point and what the R1+R2= can someone tell me?View attachment ring main table 1.pdf

 

[ETradesmen]

Plug 1?

always under the impression the highest reading is the mid point...


correct me if I'm wrong

 

[Silly Sausage]

I take it these are measurements taken with the cables cross connected, fig 8 style?
If so, good ring.
Do Zs test on every socket, apart from spur, to locate mid point which will be the highest reading.

 

[william1]

so the highest reading of the R1+Rn readings excluding the spur is the mid-point of the RFC, that bit came up right but i still got the other bit wrong its ATL practical training virtual programme quite cool if you know what your doing lol

 

[william1]

yh its virtual learning you have to do it all right or it wont let you move on to the next senario, if this was someones house id be on rouge traders lol

 

[ETradesmen]

So was I correct?

 

[william1]

yup

 

[william1]

so now i have a virtual schedule of test results sheet and i have to input the (R1+R2)?

 

[Silly Sausage]

No no no...
Your dead test with Line & Earth cross connected is to show the ring is good.
You've of course done your end to end tests...r1, r2 & rn.
R1 + R2 = (r1 + r2)/4 Note upper & lower case letters.
If it is a good ring, all your measurements will be the same at every socket, ones at spurs will be slightly higher.

I am the worst teacher in the world by the way!

 

[Sintra]

If those tables are from a training source their terminologies leave a lot to be desired.

 

[william1]

yes its 0.74ohms thanks and im so sorry for the table i had to do that myself i wish you could come here and do the rest of this programme for me lol

 

[Silly Sausage]

William, get your hands off those Essex blondes, go and buy yourself a copy of GN3 and get reading.
Terminally boring I know, but you only have to do it once!

 

[Sintra]

Don't quite know were you're getting the 0.74 for R1+R2 from if r1 is 0.27 and r2 is 0.45 you don't just add them together. Archy has already said R1+R2 = r1+r2/4

 

[william1]

NOT MORE BOOKS PLEASE LOL! i have a green bible and couple of other books i just got so frustrated because of all the terminologies like Zs Ze ohms r1 r2 rn i cant believe you can remember all this lol and to top it off i get where's the mid-point, i'm like in fridge next to carlsberg let me just go check lol

 

[william1]

it was right though i got all ticks :s

 

[Silly Sausage]

No more books.

You could be right there.
I reckon the only two you need are GN3 & 8.


The big green one you can twist it around for everthing you want!

 

[william1]

0.74 was a guess i did every test result i had even i did 0.27+0.45/4 and it comes up 0.3825 so i put this result in and i got a fail??

 

[Sintra]

Think you need a calculator it works out at 0.18

 

[Sintra]

0.27+0.45 = 0.72

0.72 / 4 = 0.18

 

[william1]

indeed it does lol drinking and maths and 1am dont go well together but the calculator won that argument, ill try it now.

 

[william1]

(0.27+0.45/4) comes to 0.3825 but (0.27+0.45)/4 comes to 0.18 oops

 

[william1]

so 0.18 is plug1 in my table which has a reading of 0.74 which is correct then?

 

[william1]

 

[william1]

LMAO when i clicked check line - line it clips both blue wires this programme is not good i thinks lol

 

[Sintra]

Sorry to be disheartening but that virtual thingy looks like a load of nonsense.

If your L-L reading is 0.27 ohms (r1), N-N reading is also 0.27 ohms (rn) and your E-E reading is 0.45 ohms (r2) then there is no way on this planet that your R1+R2 reading is 0.74 ohms. Even though this simulator says 0.74 is correct, trust me it's not.

The CORRECT R1 + R2 is 0.18 ohms

If you believe to much in that programme you will fail big style.

 

[william1]

my tutor has just confirmed that the senario is indeed wrong and that all you helpful sparkys were right so thanks alot to you all

 

[Sintra]

my tutor has just confirmed that the senario is indeed wrong and that all you helpful sparkys were right so thanks alot to you all

Thank god for that