Need to earth back boxes? Earth sleeves etc.

[HawkEye244]

FYI part P is a building reg, not something dreamt up by anybody in the trade. As for following advice given by hawkeye the next P you may meet is St. Peter.

Come now, you run a cable from one socket to the other, it's not rocket science. The fear mongering is tiresome. We all know how easy it is, if a spark gets offended because I can do their job, why come to a diy forum at all, just to slag off home diyers? Makes no sense, unless of course there are sparks here trying to pick up work with their constant put downs, and ''I'm better than you'' mentality.

Anyway, hiring someone from derry to do electrical work is a risk in itself

 

[Draughtsman]

Well, the site is called diyNOT.

And when I took the old ceilling eyeballs out (horrid things, can't put insulation over them) I used the existing cables for the new lights.

And the 'wrought iron' Juliette rail outside that door, I made that too.

 

[ban-all-sheds]

For the majority of meters that is true.

There are ways to measure voltage that depend on no current flowing in the meter. But if little if any use in electrical installations.



Lamps do have current flowing, but there are indicators that indicate by using electrostatic forces, no perceivable current flows other than that required to charge the capacitance of the indicator.

Don't you start as well.

This is bonkers, utterly utterly bonkers.

Claiming that a device which indicates some condition or other doesn't in fact indicate it because of how the indicating device produces indication when the condition triggers its operation.

Bonkers, utterly utterly bonkers.

 

[bernardgreen]

This is bonkers, utterly utterly bonkers.

The potentiometer and the Wheatstone bridge are two methods for making null measurements. The potentiometer is an instrument that measures an unknown voltage by opposing with a known voltage, without drawing current from the voltage source being measured.

and further reading to improve your knowledge.

https://electronics.stackexchange.c...asuring-methods-considered-to-be-very-precise

 

[ban-all-sheds]

FGS.

I have one of those electric twin-plate griddles.

When it gets to temperature a little green light comes on.

That green light is indicating that it has got to temperature. To start arguing that "no it doesn't, it indicates that current is flowing through the light" is bonkers. Utterly utterly bonkers.

What's wrong with you?

 

[mwatsonxx]

That's correct. Be aware that the same is not usually true of plastic switches (like light switches), since they have no earth connection, so cannot earth a back box via faceplate screws.

Kind Regards, John

More nonsense https://www.tlc-direct.co.uk/Produc...MImL758rX31gIVC7gbCh3ioAvvEAQYAyABEgIAqPD_BwE

 

[bernardgreen]

That green light is indicating that it has got to temperature.

or the device controlling the current through the indicator has gone short circuit.

 

[mwatsonxx]

To the op, earth wires must be terminated in all back boxes, whether they are steel or plastic is irrelevant. Plate fixing screws are not an acceptable method of earthing back boxes or metallic plates.

 

[Taylortwocities]

To the op, earth wires must be terminated in all back boxes

There is NO must about it. Please quote the regulation number to support your assertion.
It is good practice, and not required if the back box has at least one fixed lug..

 

[mwatsonxx]

There is NO must about it. Please quote the regulation number to support your assertion.
It is good practice, and not required if the back box has at least one fixed lug..

I don't play with the safety of others, Explain what happens when some replaces the metal screws with nylon screws.

 

[Taylortwocities]

The socket is earthed. Because that's where the earth wires go.
The back box is not an extraneous conductive part (its buried in the plaster). It is necessary for metal surface sockets etc (eg metalclad), but not otherwise.

Don't tell me that you go around removing socket fronts with the power still switched on?

Regulation number please, or change your must to "it's a good idea".

 

[mwatsonxx]

and not required if the back box has at least one fixed lug..

What reg is that?

 

[mwatsonxx]

Don't tell me that you go around removing socket fronts with the power still switched on?

How do you know the power is off?

 

[Taylortwocities]

What reg is that?

I asked you first. You show me yours, and then I'll show you mine.

 

[ban-all-sheds]

More nonsense https://www.tlc-direct.co.uk/Produc...MImL758rX31gIVC7gbCh3ioAvvEAQYAyABEgIAqPD_BwE

You aren't very good at this, are you....