Board Change

[uksparks]

Hi,

Went to look at a board change this morning, all seems fine, nothing untoward, only thing was on the downstairs ring the CPC continuity was higher than I would have liked.

r1 = 0.39
rn = 0.41
r2 = 1.44

I was half expecting around 0.75 ish, how far over the expected do you accept without investigation? I would imagine its probably just a poor connection in a socket somewhere. Usually I would look and see if i tighten them all up a bit, but would it be acceptable to change the board would you say without doing anything and just making a note of it?

The Zs on all sockets were fine, just the continuity on the ring that's all. So really just wondering if you have an upper limit as to saying "yeah that will do" before you look into it.

Where do you draw the line of acceptable?
Cheers,

 

[davesparks]

My house was done like that until I changed it, it's only when I thought I'd replace all the faceplates then thought, damn who did this, it's a bit cowboy ish IMHO.

I don't know about cowboyish, it was a fairly common practice once. Usually the cpc which goes to the box first will be an unbroken conductor just folded to fit in the terminal, pretty unlikely to cause a high resistance.

I agree fully that it is not the right way to do it these days though.

 

[7029 dave]

I don't know about cowboyish, it was a fairly common practice once. Usually the cpc which goes to the box first will be an unbroken conductor just folded to fit in the terminal, pretty unlikely to cause a high resistance.

I agree fully that it is not the right way to do it these days though.

Agreed it was common practice. Late 80's to 90's. I never did.

 

[amckay]

My house was done like that until I changed it, it's only when I thought I'd replace all the faceplates then thought, damn who did this, it's a bit cowboy ish IMHO.

I don't know about cowboyish, it was a fairly common practice once. Usually the cpc which goes to the box first will be an unbroken conductor just folded to fit in the terminal, pretty unlikely to cause a high resistance.

I agree fully that it is not the right way to do it these days though.

That's how I was taught in college in 2011. WAS...

 

[shanky887614]

straight to socket. what is the point in connecting it to backbox? you need to take the faceplate off to get to it so? and usually its not connected to anything metalic so no issue

 

[davesparks]

Because earthing of back boxes was standard practice in those days, it's how I was taught.
These days it is not a requirement, but many people still consider it to be good practice.

It is a debate that has gone on since time immemorial, and I don't suppose it will stop anytime soon

 

[shanky887614]

Because earthing of back boxes was standard practice in those days, it's how I was taught.
These days it is not a requirement, but many people still consider it to be good practice.

It is a debate that has gone on since time immemorial, and I don't suppose it will stop anytime soon

true but cpc in/out on socket then flying lead to backbox would be my choice

 

[uksparks]

I always earth the backbox, and always take all to the faceplate first then a flylead.