Examples of, anyone?

[Edd]

To be honest, a shaver socket does not really fit the bill as an example.
A better example would be a bell circuit that uses a transformer that fits into a CU.

Why do you say its not a good example? They have 2 outputs one of 230v and the other 110v, both fed from an isolating transformer, no earth conection. In my eyes its sole means of protection is electrical seperation, its not relying on selv or any other means. your bell example is using selv as its main means of protection.

 

[Deleted member 26818]

Why do you say its not a good example? They have 2 outputs one of 230v and the other 110v, both fed from an isolating transformer, no earth conection. In my eyes its sole means of protection is electrical seperation, its not relying on selv or any other means. your bell example is using selv as its main means of protection.

A shaver socket is not an individual item of equipment that is supplied via a separated source.
An item of equipment plugged into the shaver socket would be supplied by a separated source, however such an item would fall outside of the scope of BS7671.

 

[Edd]

however such an item would fall outside of the scope of BS7671.

Can you point to where please, as i have always put on Domestic EICR's that the shaver point was a form of electrical seperation. and on comersial I would use a site transformer as electrical seperation. The NIC has never told me I was wrong. But I always like it if they are

 

[Adam W]

I would have said a shaver socket is a better example than a door bell - a door bell would be SELV. Separated yes, but also ELV which wasn't asked for.
A shaver socket is probably the example they're looking for.
An isolating transformer supplying more than one item of equipment could be a site transformer.

 

[Deleted member 26818]

Both a shaver socket and a site transformer are examples of a source of electrical separated supplies.
However neither are individual items of equipment suplied by electrical separation.

 

[Edd]

Both a shaver socket and a site transformer are examples of a source of electrical separated supplies.
However neither are individual items of equipment suplied by electrical separation.

I see where you are coming from with that, but as theres a sepreate tick box for selv, if you had no selv in an instalation but you did have a shaver point, would you put N/A in the electrical seperation box? that then means the shaver point is not checked except for its bs number under BS 7671. The way I see it any Isolation transformer that supplys a piece of equipment with voltages greater than selv should be checked for electrical seperation. otherwise in your eyes it falls under no catogry at all. But I do see what you mean about it not being a piece of equipment

 

[stef]

Both a shaver socket and a site transformer are examples of a source of electrical separated supplies.
However neither are individual items of equipment suplied by electrical separation.

I disagree, they are supplied from the HV / LV tranny in a substation:biggrinjester:

 

[Adam W]

I seem to remember on the old schedule of inspections there were separate boxes for circuits supplying one item of equipment, and multiple items. On the new EICR SOI there are sections under locations containing a bath or shower for
'Where used as a protective measure, requirements of SELV or PELV met (701.414.4.5)' and
'Shaver sockets comply with BSEN61558-2-5 formerly BS3535 (701.512.3)'.

If for whatever reason you had some non-standard system of electrical separation it could be listed under comments, but I would think that would be too rare to warrant a dedicated box on the form.

 

[Eco Chap]

Sma's inverters are an example I use when installing pv circuits