Supplementary Bonding - How was it wired?

[Midwest]

Taking a bond to the Bathrom lighting circuit was standard,not rare practice

I have seen literally hundreds of installations where the lighting has been done this way

Many of these had a rising cable near where the bathroom pull cord was located,if the terminal was not meaty enough,then a connector block was fitted
The supplementary bonding could also be found external to the Bathroom,in a nearby cupboard etc

Yes thanks seen bonding in nearby cupboard, just never seen it taken from a light, so I just wondered if that was ever practised and it seems it was.

 

[LeeH]

Hot to cold to rad to light CPC was the norm when I was at sparky school.

Not done any domestic work since then mind you.

 

[kingeri]

In my own bathroom, the pipework is all bonded together, together with the shower, towel rail and lighting CPCs. The 4mm goes up through the airing cupboard and into a downlight junction box.

 

[SPARTYKUS]

In my loft, all cpcs are twisted together. Outside the JBs. :shades_smile:

 

[Geoffsd]

just to know where else to check, before I test pipework continuity.

Wouldn't it be better to test first.

It may not be required.

 

[Midwest]

Wouldn't it be better to test first.

It may not be required.

That's what I'll do, but would be nice to see them in place before doing so.

 

[Guest111]

Years ago Ali windows were bonded,that stopped when a fault on a house made all the earths live and a window cleaner got electrocuted,I also remember when there was talk of making all metal outside lights have to be rodded,there was great debate about the aesthetics of a 6mm g/y running down the front wall of a house,needless to say it never happened but someone at the IEE obviously thought it was a good idea.

 

[tom79bmth]

Pretty sure on the 16th edition they made amendment to supplementary bonding where all circuits had to be linked IE shower lighting circuits I think it was about 10 years ago then it was changed back again

 

[Geoffsd]

That's what I'll do, but would be nice to see them in place before doing so.

But if the situation is such that supplementary bonding is not required then there will be nothing to see.

Testing/measuring is the only way to tell if it is required.

 

[Midwest]

Point taken

 

[guest119]

1985 doing the 15th 5 night update we were told to hose the bathroom window from outside then go indoors and measure the frames resistance to earth.
Any reading at all and it was to be bonded.

Boydy

 

[7029 dave]

Nobody has mentioned bonding the old cast iron baths back in the day.

 

[kingeri]

My old bath had an earthing terminal underneath it!

 

[Silly Sausage]

My old bath had an earthing terminal underneath it!

My bath has two big 230V motors underneath it.
Must get that panel put back on.

Not a supp bond in sight.

 

[Midwest]

I was going to do my continuity tests, and was quite confident that using the formulae from reg. 415.2.2; R< 50/Ia ,where in the case of a 6amp BS EN 60898 MCB Ia = 30amp. Therefore R=50/30 < (less than) 1.666ohms. However, talking to another electrician, he said the reading should be below 0.05ohms. Can anyone advise?