Examples of, anyone?

[the pict]

Can anyone give me examples of
"Use of electrical seperation to supply an individuall item of equipment",
and as above for more than one, I have read through 418.3 etc but I cannot find an example, I know that it is outside the remit of BS7671 to provide examples for everything, the book would run to several volumes, however a few examples would help
Pict

 

[BigBreakfast]

Think of selv for one as an example .

 

[the pict]

Yes in a domestic situation the shaver point is selv but it is the "provision of a SELV circuit" I should have asked what in your experience in a commercial environment are examples you have come across equipment wise and why was it seperated and how,
Pict

 

[Richard Burns]

A shaver point is not SELV it is separated but it is not ELV.

 

[the pict]

Absoulutly correct Richard, I stand corrected, I was thinking of the seperated aspect, but I really must pay more attention, more caffiene required
Pict

 

[DaveyD]

a few examples would help
Pict

Hi Pict, What about an isolating transformer in a radio/tv repair workshop.
Regards, Dave

 

[the pict]

Good one Davey, to be honest I am struggling to find any other than similar to your suggestion probably schools colleges etc, elv lighting apart
Pict

 

[stef]

Hi pict, try 110 V tranny for electrical hand tools, low voltage transformer for 12v downlighters, high/ low voltage transformers in substations, transformers for door bells, mobile phone chargers from the 90s ( not the modern ones you get today cos they aren't sepparating, really), ...

 

[StuSpiers]

Blackely units in schools.

Although they don't supply one item they are for bench sockets usually.

 

[stef]

Learned something new, had to google this Blakely unit to see what it was.

 

[RogertheBodger]

Electric arc welding set, Neon signs.

 

[ackbarthestar]

Separated circuits, as suggested by others, don't have to be SELV.

Any circuit that employs the use of a isolating transformer where there is no earth return path on the secondary side. Hand tools, pumps compressors, used in cable tunnels where there is restricted access/movement see section 706

 

[Risteard]

A shaver socket is an example of electrical separation supplying an individual item.

 

[Deleted member 26818]

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.

 

[silverfox1]

Worked on some operating theatres where the equipment was all supplied via Isolated Power Supply panels.