What makes you question things?

[IAmSparkytus!]

Evening all,

Was thinking the other day about an installation I've seen where the 2 earths of a ring main at the DB were covered in one sheath of sleeving.

This made me wonder whether end to end tests would have been carried out or not. Would someone do the tests and then put the sleeving on?

I know I make off a board and then carry out the testing when all cables are terminated.

Are there any other things you all come across which make you question whether things might have been missed?

 

[SparkySy]

@Dustydazzler
This is done so that any cable that may have become damaged during installation is tested to earth as well. That way you can be sure there is definitely no faults through say the building steel ect that would have been missed by doing the test disconnected from the earth bar. If that makes sense

 

[GBDamo]

Am I being completely thick , but why? do you need to connect the earths to the earth bar to conduct your initial IR tests

at college we did dead tests prior to connecting circuits to the board

@Dustydazzler
This is done so that any cable that may have become damaged during installation is tested to earth as well. That way you can be sure there is definitely no faults through say the building steel ect that would have been missed by doing the test disconnected from the earth bar. If that makes sense

Although there is nothing to stop you IR testing circuit lives to incoming CPC, or MET if local, as well as circuit CPC to tick that box.

IR becomes a five point test (obviously not TPN) instead of three but the ease of access and not having to redress the CU makes it worth it.