rewiring

[7029 dave]

Used to use these on wooden switch boxes, believe you can't use them anymore.

View attachment 35596

 

[buzzlightyear]

drzsta ,how is the land of my fathers.

 

[telectrix]

drzsta ,how is the land of my fathers.

what planet?

 

[buzzlightyear]

only drzsta can give you the answer telectrix I will give you a clue dragon .

 

[AJAY198887]

IMO, he could be correct, wooden back boxes is a no no, in the sense if it needed rewiring they would need to be changed, is it red black pvc or VIR.? More info is needed regarding his test, could be low IR.

Yes sir the red and black wire are pvc and very good condition

 

[Dave the spark]

Yes sir the red and black wire are pvc and very good condition

How do you know that they're in good condition? Looking at them inside the dB or at a socket or switch tells you nothing I'm afraid. To know they are in good condition you need to put 500v through them and see what the meter tells you.

 

[Dave the spark]

Also, you would need to know if there is a CPC serving the length of the ring final circuit, which as there's no earth conductor and wooden boxes I would highly doubt it. Again though, this needs to be ascertained through the correct test procedures.

 

[davesparks]

Also, you would need to know if there is a CPC serving the length of the ring final circuit, which as there's no earth conductor and wooden boxes I would highly doubt it. Again though, this needs to be ascertained through the correct test procedures.

It's in steel conduit, therefore there must be a cpc at every point already

 

[davesparks]

Has anyone ever seen wooden back boxes??? I have seen plinths/pattress but never sunken box. I suspect this is metal conduit with singles drawn through. If so I may be possible to draw an earth through and change the boxes. A picture would soon scotch that conjecture.

Steel conduit is a cpc so why would you add another one inside it?

 

[buzzlightyear]

Yes sir the red and black wire are pvc and very good condition

picture would be nice.

 

[Pete999]

Steel conduit is a cpc so why would you add another one inside it?

I agree wooden boxes is a bit suspect, but saying that stranger things have been found, if it is indeen serviced by wooden boxes the conduit could not be used as the cpc as it wouldn't be continuous. But as others have inquired a picture and proof of the wooden box statement would put the debate to rest.

 

[Dave the spark]

It's in steel conduit, therefore there must be a cpc at every point already

I realise it's in steel conduit. How is the continuity met if they terminate in wooden boxes?

 

[Dave OCD]

It'll be that special treated low resistance wood they used in the old days.

 

[Pete999]

It'll be that special treated low resistance wood they used in the old days.

Now you are just being plain silly aren't you Dave? go and stand on the naughty step for the rest of the evening.

 

[Dave OCD]

Yes Pete, I think a little bit of silliness is needed every now and then.

 

[Dave the spark]

It'll be that special treated low resistance wood they used in the old days.

Nah mate, you're barking up the wrong tree...

 

[Dave OCD]

Not sure, they stocked them years ago in my local branch.

 

[Pete999]

Yes Pete, I think a little bit of silliness is needed every now and then.

I agree with that

 

[Des 56]

I suspect the wood is easily identified,it must come from the trees they use to catch those lightning bolts

 

[davesparks]

I agree wooden boxes is a bit suspect, but saying that stranger things have been found, if it is indeen serviced by wooden boxes the conduit could not be used as the cpc as it wouldn't be continuous. But as others have inquired a picture and proof of the wooden box statement would put the debate to rest.

The conduit can still be used as the CPC as long a suitable flylead is connected. There were, and still are suitable conduit fittings for connecting a fly lead to a conduit.

I realise they weren't available in the past but these days I use the piranha nuts on the end of steel conduit if I'm running it in to an insulated enclosure .