Cable rating / part P

[thaxter]

Hi, I have a water still that is rated 3kw, the instructions say it must be wired for continuous 15amp running and needs to be wired through a double pole switch back to the board. Can I run this in 2.5 twin+E or should I go larger?

Also, this is an educational institution, can I do this without 'Part P' as it is not a 'dwelling'?

Thanks in anticipation

 

[securespark]

Is the institution based at a domestic address?

 

[thaxter]

No

 

[Spark123]

It does not fall into the scope of part p, it does however fall into the scopes of "The Electricity at Work regs" and "The Health and Safety at Work Act" to mention a couple. You should check it is OK for you to do this with the governing body of the institution and the insurance company before starting just to play it safe.
The cable size depends on how it is installed i.e. how it is mounted, ambient temp, run through thermal insulation, rewirable fuses and how long a cable run it is.

 

[Lectrician]

And assuming T+E????????

Hum - I wonder what the install is at the moment? Will T+E be the best choice?

 

[Albert]

And assuming T+E????????

Hum - I wonder what the install is at the moment? Will T+E be the best choice?

And do not forget that because it is not a domestic the circuit length can cause volt drop problem which means that all other specifications and values are ok but still you might have to use the next size cable.

 

[fattony]

[/quote]
And do not forget that because it is not a domestic the circuit length can cause volt drop problem which means that all other specifications and values are ok but still you might have to use the next size cable.[/quote]


Is there no volt drop on a domestic then

 

[Albert]

Is there no volt drop on a domestic then

The chance that you will have a domestic installation with a circuit length to cause a problem is very remoth although exists, I wonder how often you used in a domestic installation 2.5mm2 for lighting or 4mm2 for rings.
I did not say thet there is no volt drop what I said is that the length of the circuit in a comercial installation CAN CAUSE A PROBLEM, Which means that the Volt drop will not comply with the 4% limit.

Your remark in negative and was not necessary, I am sure that thaxter got it right...